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Groups > sci.electronics.design > #518185 > unrolled thread
| Started by | mukhtar1042@gmail.com |
|---|---|
| First post | 2018-10-03 04:58 -0700 |
| Last post | 2018-10-03 18:19 -0700 |
| Articles | 18 — 8 participants |
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" Real time ECG monitoring of Patients using Wifi " mukhtar1042@gmail.com - 2018-10-03 04:58 -0700
Re: " Real time ECG monitoring of Patients using Wifi " gnuarm.deletethisbit@gmail.com - 2018-10-03 05:23 -0700
Re: " Real time ECG monitoring of Patients using Wifi " mukhtar1042@gmail.com - 2018-10-03 05:33 -0700
Re: " Real time ECG monitoring of Patients using Wifi " tabbypurr@gmail.com - 2018-10-03 06:35 -0700
Re: " Real time ECG monitoring of Patients using Wifi " mukhtar1042@gmail.com - 2018-10-03 07:59 -0700
Re: " Real time ECG monitoring of Patients using Wifi " Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2018-10-03 16:30 +0100
Re: " Real time ECG monitoring of Patients using Wifi " George Herold <gherold@teachspin.com> - 2018-10-03 08:21 -0700
Re: " Real time ECG monitoring of Patients using Wifi " mukhtar1042@gmail.com - 2018-10-03 08:28 -0700
Re: " Real time ECG monitoring of Patients using Wifi " gnuarm.deletethisbit@gmail.com - 2018-10-03 11:09 -0700
Re: " Real time ECG monitoring of Patients using Wifi " mukhtar1042@gmail.com - 2018-10-03 11:28 -0700
Re: " Real time ECG monitoring of Patients using Wifi " gnuarm.deletethisbit@gmail.com - 2018-10-03 11:34 -0700
Re: " Real time ECG monitoring of Patients using Wifi " Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-10-03 12:24 -0700
Re: " Real time ECG monitoring of Patients using Wifi " gnuarm.deletethisbit@gmail.com - 2018-10-03 13:00 -0700
Re: " Real time ECG monitoring of Patients using Wifi " Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-10-03 13:10 -0700
Re: " Real time ECG monitoring of Patients using Wifi " gnuarm.deletethisbit@gmail.com - 2018-10-03 15:56 -0700
Re: " Real time ECG monitoring of Patients using Wifi " jrwalliker@gmail.com - 2018-10-03 08:39 -0700
Re: " Real time ECG monitoring of Patients using Wifi " mukhtar1042@gmail.com - 2018-10-03 08:50 -0700
Re: " Real time ECG monitoring of Patients using Wifi " Jeff Liebermann <jeffl@cruzio.com> - 2018-10-03 18:19 -0700
| From | mukhtar1042@gmail.com |
|---|---|
| Date | 2018-10-03 04:58 -0700 |
| Subject | " Real time ECG monitoring of Patients using Wifi " |
| Message-ID | <a0c69f90-e6c7-46f3-89e0-f365cb8b2f9d@googlegroups.com> |
Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... Can somebody give me any suggestions !!
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| From | gnuarm.deletethisbit@gmail.com |
|---|---|
| Date | 2018-10-03 05:23 -0700 |
| Message-ID | <e8b26995-b91e-49e7-9910-d781ff43b5e6@googlegroups.com> |
| In reply to | #518185 |
On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > Can somebody give me any suggestions !! Your question is a bit vague, but I suppose that is because you are just getting started and have no understanding of any of the details? Can you share the circuit diagram you are working with? Do you at least appreciate that you will need to convert the analog signal to digital and you need to do a lot of (mostly analog) signal conditioning? Throw us a bone. This sounds a lot like a school project. Many here will be glad to help you, but only if you show you are doing most of the work yourself... or at least getting started on your own. Rick C.
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| From | mukhtar1042@gmail.com |
|---|---|
| Date | 2018-10-03 05:33 -0700 |
| Message-ID | <d1b137fb-6d56-4f4e-91ff-e84f7513ac27@googlegroups.com> |
| In reply to | #518187 |
On Wednesday, October 3, 2018 at 5:23:27 PM UTC+5, gnuarm.del...@gmail.com wrote: > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > Can somebody give me any suggestions !! > > Your question is a bit vague, but I suppose that is because you are just getting started and have no understanding of any of the details? > > Can you share the circuit diagram you are working with? Do you at least appreciate that you will need to convert the analog signal to digital and you need to do a lot of (mostly analog) signal conditioning? > > Throw us a bone. This sounds a lot like a school project. Many here will be glad to help you, but only if you show you are doing most of the work yourself... or at least getting started on your own. > > Rick C. I am using AD8232 ECG sensor ... Yeah , i think there will be converion of analog to digital signal in this project ... The main issue i thin k is the transmission of ECG signal from Arduino to another PC on a Graphical User Interface in real time to display the ECG signal in graphical form !
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| From | tabbypurr@gmail.com |
|---|---|
| Date | 2018-10-03 06:35 -0700 |
| Message-ID | <9ca578c9-ffbc-4937-b508-166de8e89a60@googlegroups.com> |
| In reply to | #518188 |
On Wednesday, 3 October 2018 13:33:50 UTC+1, mukht...@gmail.com wrote: > On Wednesday, October 3, 2018 at 5:23:27 PM UTC+5, gnuarm.del...@gmail.com wrote: > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > Can somebody give me any suggestions !! > > > > Your question is a bit vague, but I suppose that is because you are just getting started and have no understanding of any of the details? > > > > Can you share the circuit diagram you are working with? Do you at least appreciate that you will need to convert the analog signal to digital and you need to do a lot of (mostly analog) signal conditioning? > > > > Throw us a bone. This sounds a lot like a school project. Many here will be glad to help you, but only if you show you are doing most of the work yourself... or at least getting started on your own. > > > > Rick C. > > I am using AD8232 ECG sensor ... Yeah , i think there will be converion of analog to digital signal in this project ... The main issue i thin k is the transmission of ECG signal from Arduino to another PC on a Graphical User Interface in real time to display the ECG signal in graphical form ! Well wifi doesn't transmit analogue afaik, so I'm pretty sure there's going to be A->D. It does sound like you want someone else to do the project. NT
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| From | mukhtar1042@gmail.com |
|---|---|
| Date | 2018-10-03 07:59 -0700 |
| Message-ID | <e7e961ce-4e63-4fb1-9d8b-3bcc52364a1c@googlegroups.com> |
| In reply to | #518198 |
On Wednesday, October 3, 2018 at 6:35:30 PM UTC+5, tabb...@gmail.com wrote: > On Wednesday, 3 October 2018 13:33:50 UTC+1, mukht...@gmail.com wrote: > > On Wednesday, October 3, 2018 at 5:23:27 PM UTC+5, gnuarm.del...@gmail.com wrote: > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > Can somebody give me any suggestions !! > > > > > > Your question is a bit vague, but I suppose that is because you are just getting started and have no understanding of any of the details? > > > > > > Can you share the circuit diagram you are working with? Do you at least appreciate that you will need to convert the analog signal to digital and you need to do a lot of (mostly analog) signal conditioning? > > > > > > Throw us a bone. This sounds a lot like a school project. Many here will be glad to help you, but only if you show you are doing most of the work yourself... or at least getting started on your own. > > > > > > Rick C. > > > > I am using AD8232 ECG sensor ... Yeah , i think there will be converion of analog to digital signal in this project ... The main issue i thin k is the transmission of ECG signal from Arduino to another PC on a Graphical User Interface in real time to display the ECG signal in graphical form ! > > Well wifi doesn't transmit analogue afaik, so I'm pretty sure there's going to be A->D. It does sound like you want someone else to do the project. > > > NT I don't want someone else to do my project. I want someone to guide me about this A>D conversion & transmission of that digital data into graphical form in real time on a pc/laptop
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| From | Martin Brown <'''newspam'''@nezumi.demon.co.uk> |
|---|---|
| Date | 2018-10-03 16:30 +0100 |
| Message-ID | <pp2nb3$1bpq$1@gioia.aioe.org> |
| In reply to | #518188 |
On 03/10/2018 13:33, mukhtar1042@gmail.com wrote: > On Wednesday, October 3, 2018 at 5:23:27 PM UTC+5, > gnuarm.del...@gmail.com wrote: >> On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, >> mukht...@gmail.com wrote: >>> Hi fellows . I am doing a project of " Real time ECG monitoring >>> of Patients using Wifi " . >>> >>> I would like to know how can ESP8266 wifi module transmit the >>> analog recorded signal of the ECG of any patient wirelessly & >>> then display that signal digitally ( In form of Graph ... Proper >>> ECG signal ) through this wifi module by using a server, on >>> another Laptop/Android mobile ... basically , to display that ECG >>> signal acquired onto a Graphical User Interface on a laptop/pc. >>> [snip] >> Throw us a bone. This sounds a lot like a school project. Many >> here will be glad to help you, but only if you show you are doing >> most of the work yourself... or at least getting started on your >> own. >> >> Rick C. > > I am using AD8232 ECG sensor ... Yeah , i think there will be > converion of analog to digital signal in this project ... The main OK. So step one is get the basic hardware capture of the waveform working locally. You could try googling to find more info eg. https://learn.sparkfun.com/tutorials/ad8232-heart-rate-monitor-hookup-guide I expect there are others for popular platforms. I have a sneaky feeling you are supposed to be developing new code from scratch to do this. > issue i thin k is the transmission of ECG signal from Arduino to > another PC on a Graphical User Interface in real time to display the > ECG signal in graphical form ! Transferring it in realtime to a PC (or near realtime) may prove challenging if you are not allowed to buffer it and send in bursts. Displaying it on a remote PC is a separate part of the problem. The easiest way to do it depends on the tools you have available. -- Regards, Martin Brown
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| From | George Herold <gherold@teachspin.com> |
|---|---|
| Date | 2018-10-03 08:21 -0700 |
| Message-ID | <aa4f5412-3dc6-4765-ad4a-0b72acfb8ded@googlegroups.com> |
| In reply to | #518185 |
On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > Can somebody give me any suggestions !! School project or work project? how much time? If you don't know what to do it's often best to separate the problem into many smaller pieces. Input/convert data, transmit data, display data. You can start with any piece. Do you have any experience with any of that? George H.
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| From | mukhtar1042@gmail.com |
|---|---|
| Date | 2018-10-03 08:28 -0700 |
| Message-ID | <928eec83-0498-4ae3-a760-156e786ca71c@googlegroups.com> |
| In reply to | #518205 |
On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > Can somebody give me any suggestions !! > > School project or work project? how much time? > If you don't know what to do it's often best to separate the problem > into many smaller pieces. > Input/convert data, transmit data, display data. > You can start with any piece. > Do you have any experience with any of that? > > George H. Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ?
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| From | gnuarm.deletethisbit@gmail.com |
|---|---|
| Date | 2018-10-03 11:09 -0700 |
| Message-ID | <28a1b571-5eab-45be-8df7-d43c36dbe421@googlegroups.com> |
| In reply to | #518206 |
On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > Can somebody give me any suggestions !! > > > > School project or work project? how much time? > > If you don't know what to do it's often best to separate the problem > > into many smaller pieces. > > Input/convert data, transmit data, display data. > > You can start with any piece. > > Do you have any experience with any of that? > > > > George H. > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. Rick C.
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| From | mukhtar1042@gmail.com |
|---|---|
| Date | 2018-10-03 11:28 -0700 |
| Message-ID | <ca5cf242-8dc0-4032-a633-8e75c884b2b8@googlegroups.com> |
| In reply to | #518226 |
On Wednesday, October 3, 2018 at 11:09:55 PM UTC+5, gnuarm.del...@gmail.com wrote: > On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > Can somebody give me any suggestions !! > > > > > > School project or work project? how much time? > > > If you don't know what to do it's often best to separate the problem > > > into many smaller pieces. > > > Input/convert data, transmit data, display data. > > > You can start with any piece. > > > Do you have any experience with any of that? > > > > > > George H. > > > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? > > Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. > > Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. > > Rick C. Thanks a lot
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| From | gnuarm.deletethisbit@gmail.com |
|---|---|
| Date | 2018-10-03 11:34 -0700 |
| Message-ID | <fc3bcc39-efe8-4275-a962-fc8b34b848d8@googlegroups.com> |
| In reply to | #518227 |
On Wednesday, October 3, 2018 at 2:28:26 PM UTC-4, mukht...@gmail.com wrote: > On Wednesday, October 3, 2018 at 11:09:55 PM UTC+5, gnuarm.del...@gmail.com wrote: > > On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > > > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > > > Can somebody give me any suggestions !! > > > > > > > > School project or work project? how much time? > > > > If you don't know what to do it's often best to separate the problem > > > > into many smaller pieces. > > > > Input/convert data, transmit data, display data. > > > > You can start with any piece. > > > > Do you have any experience with any of that? > > > > > > > > George H. > > > > > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? > > > > Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. > > > > Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. A couple of the small wi-fi devices on eBay (and other places) are the ESP-8266 and ESP-01. The ESP-01 is a more capable and secure device but will use more power. I don't know that they actually use much less power than an rPi-W but they should. They will be a little harder to program than an rPi, but a lot of the grunt work has been done in terms of getting started. The ESP-8266 in particular has quite the community even if nothing like the rPi. I don't recall what they have for analog I/O, but I think it is at least multichannel if not any more precision than 10 bits. So you might still be using your ADC. Once you start designing hardware, this is a good group to get advice on minimizing noise which will be one of your biggest problems. Rick C.
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| From | Lasse Langwadt Christensen <langwadt@fonz.dk> |
|---|---|
| Date | 2018-10-03 12:24 -0700 |
| Message-ID | <34735ecd-cb2b-4d9e-a7cd-e65b996eb960@googlegroups.com> |
| In reply to | #518229 |
onsdag den 3. oktober 2018 kl. 20.35.03 UTC+2 skrev gnuarm.del...@gmail.com: > On Wednesday, October 3, 2018 at 2:28:26 PM UTC-4, mukht...@gmail.com wrote: > > On Wednesday, October 3, 2018 at 11:09:55 PM UTC+5, gnuarm.del...@gmail.com wrote: > > > On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > > > > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > > > > > Can somebody give me any suggestions !! > > > > > > > > > > School project or work project? how much time? > > > > > If you don't know what to do it's often best to separate the problem > > > > > into many smaller pieces. > > > > > Input/convert data, transmit data, display data. > > > > > You can start with any piece. > > > > > Do you have any experience with any of that? > > > > > > > > > > George H. > > > > > > > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? > > > > > > Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. > > > > > > Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. > > A couple of the small wi-fi devices on eBay (and other places) are the ESP-8266 and ESP-01. The ESP-01 is a more capable and secure device but will use more power. I don't know that they actually use much less power than an rPi-W but they should. They will be a little harder to program than an rPi, but a lot of the grunt work has been done in terms of getting started. The ESP-8266 in particular has quite the community even if nothing like the rPi. I don't recall what they have for analog I/O, but I think it is at least multichannel if not any more precision than 10 bits. So you might still be using your ADC. > > Once you start designing hardware, this is a good group to get advice on minimizing noise which will be one of your biggest problems. > > Rick C. ESP8266 has a 0-1V 10 bit adc, but it also has spi and i2c for simple things it is extremely simple because it is supported by the arduino software all you need is a ttl level serial port
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| From | gnuarm.deletethisbit@gmail.com |
|---|---|
| Date | 2018-10-03 13:00 -0700 |
| Message-ID | <19b7d198-b342-426d-ae59-066b786b443b@googlegroups.com> |
| In reply to | #518236 |
On Wednesday, October 3, 2018 at 3:24:26 PM UTC-4, Lasse Langwadt Christensen wrote: > onsdag den 3. oktober 2018 kl. 20.35.03 UTC+2 skrev gnuarm.del...@gmail.com: > > On Wednesday, October 3, 2018 at 2:28:26 PM UTC-4, mukht...@gmail.com wrote: > > > On Wednesday, October 3, 2018 at 11:09:55 PM UTC+5, gnuarm.del...@gmail.com wrote: > > > > On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > > > > > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > > > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > > > > > > > Can somebody give me any suggestions !! > > > > > > > > > > > > School project or work project? how much time? > > > > > > If you don't know what to do it's often best to separate the problem > > > > > > into many smaller pieces. > > > > > > Input/convert data, transmit data, display data. > > > > > > You can start with any piece. > > > > > > Do you have any experience with any of that? > > > > > > > > > > > > George H. > > > > > > > > > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? > > > > > > > > Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. > > > > > > > > Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. > > > > A couple of the small wi-fi devices on eBay (and other places) are the ESP-8266 and ESP-01. The ESP-01 is a more capable and secure device but will use more power. I don't know that they actually use much less power than an rPi-W but they should. They will be a little harder to program than an rPi, but a lot of the grunt work has been done in terms of getting started. The ESP-8266 in particular has quite the community even if nothing like the rPi. I don't recall what they have for analog I/O, but I think it is at least multichannel if not any more precision than 10 bits. So you might still be using your ADC. > > > > Once you start designing hardware, this is a good group to get advice on minimizing noise which will be one of your biggest problems. > > > > Rick C. > > ESP8266 has a 0-1V 10 bit adc, but it also has spi and i2c > > for simple things it is extremely simple because it is supported by the > arduino software all you need is a ttl level serial port I haven't worked with it but I read the major difference between this and the ESP-01 is security. It seems the ESP8266 was not designed with security in mind so might not be a good choice for medical applications. Rick C.
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| From | Lasse Langwadt Christensen <langwadt@fonz.dk> |
|---|---|
| Date | 2018-10-03 13:10 -0700 |
| Message-ID | <946bacfa-6f78-4f79-a38a-07504a9bb339@googlegroups.com> |
| In reply to | #518242 |
onsdag den 3. oktober 2018 kl. 22.00.44 UTC+2 skrev gnuarm.del...@gmail.com: > On Wednesday, October 3, 2018 at 3:24:26 PM UTC-4, Lasse Langwadt Christensen wrote: > > onsdag den 3. oktober 2018 kl. 20.35.03 UTC+2 skrev gnuarm.del...@gmail.com: > > > On Wednesday, October 3, 2018 at 2:28:26 PM UTC-4, mukht...@gmail.com wrote: > > > > On Wednesday, October 3, 2018 at 11:09:55 PM UTC+5, gnuarm.del...@gmail.com wrote: > > > > > On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > > > > > > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > > > > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > > > > > > > > > Can somebody give me any suggestions !! > > > > > > > > > > > > > > School project or work project? how much time? > > > > > > > If you don't know what to do it's often best to separate the problem > > > > > > > into many smaller pieces. > > > > > > > Input/convert data, transmit data, display data. > > > > > > > You can start with any piece. > > > > > > > Do you have any experience with any of that? > > > > > > > > > > > > > > George H. > > > > > > > > > > > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? > > > > > > > > > > Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. > > > > > > > > > > Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. > > > > > > A couple of the small wi-fi devices on eBay (and other places) are the ESP-8266 and ESP-01. The ESP-01 is a more capable and secure device but will use more power. I don't know that they actually use much less power than an rPi-W but they should. They will be a little harder to program than an rPi, but a lot of the grunt work has been done in terms of getting started. The ESP-8266 in particular has quite the community even if nothing like the rPi. I don't recall what they have for analog I/O, but I think it is at least multichannel if not any more precision than 10 bits. So you might still be using your ADC. > > > > > > Once you start designing hardware, this is a good group to get advice on minimizing noise which will be one of your biggest problems. > > > > > > Rick C. > > > > ESP8266 has a 0-1V 10 bit adc, but it also has spi and i2c > > > > for simple things it is extremely simple because it is supported by the > > arduino software all you need is a ttl level serial port > > I haven't worked with it but I read the major difference between this and the ESP-01 is security. It seems the ESP8266 was not designed with security in mind so might not be a good choice for medical applications. the only ESP-01 I know of is the most common board with a ESP8266 on it
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| From | gnuarm.deletethisbit@gmail.com |
|---|---|
| Date | 2018-10-03 15:56 -0700 |
| Message-ID | <9bf733ba-1dcd-421f-bdd5-adbc3ffd9f90@googlegroups.com> |
| In reply to | #518244 |
On Wednesday, October 3, 2018 at 4:10:15 PM UTC-4, Lasse Langwadt Christensen wrote: > onsdag den 3. oktober 2018 kl. 22.00.44 UTC+2 skrev gnuarm.del...@gmail.com: > > On Wednesday, October 3, 2018 at 3:24:26 PM UTC-4, Lasse Langwadt Christensen wrote: > > > onsdag den 3. oktober 2018 kl. 20.35.03 UTC+2 skrev gnuarm.del...@gmail.com: > > > > On Wednesday, October 3, 2018 at 2:28:26 PM UTC-4, mukht...@gmail.com wrote: > > > > > On Wednesday, October 3, 2018 at 11:09:55 PM UTC+5, gnuarm.del...@gmail.com wrote: > > > > > > On Wednesday, October 3, 2018 at 11:28:57 AM UTC-4, mukht...@gmail.com wrote: > > > > > > > On Wednesday, October 3, 2018 at 8:21:08 PM UTC+5, George Herold wrote: > > > > > > > > On Wednesday, October 3, 2018 at 7:58:18 AM UTC-4, mukht...@gmail.com wrote: > > > > > > > > > Hi fellows . I am doing a project of " Real time ECG monitoring of Patients using Wifi " . > > > > > > > > > > > > > > > > > > I would like to know how can ESP8266 wifi module transmit the analog recorded signal of the ECG of any patient wirelessly & then display that signal digitally ( In form of Graph ... Proper ECG signal ) through this wifi module by using a server, on another Laptop/Android mobile ... basically , to display that ECG signal acquired onto a Graphical User Interface on a laptop/pc. > > > > > > > > > > > > > > > > > > If somebody help me with the proper Arduino code , hardware & software schematics , Circuit diagram , proper connections ... > > > > > > > > > > > > > > > > > > I am unable to understand the circuit diagram of this project , and the main problem in this project is transmission of analog signal using arduino & a wifi module ... > > > > > > > > > > > > > > > > > > Instead of ESP8266 wifi module , can i use bluetooth module with arduino for transmission of ECG signal ... > > > > > > > > > > > > > > > > > > Can somebody give me any suggestions !! > > > > > > > > > > > > > > > > School project or work project? how much time? > > > > > > > > If you don't know what to do it's often best to separate the problem > > > > > > > > into many smaller pieces. > > > > > > > > Input/convert data, transmit data, display data. > > > > > > > > You can start with any piece. > > > > > > > > Do you have any experience with any of that? > > > > > > > > > > > > > > > > George H. > > > > > > > > > > > > > > Work project. I really want to know the A>D conversion of ECG signal in this case & the transmission of that digital data on another pc through wifi. Can someone tell me about this ? > > > > > > > > > > > > Ok, the easy way to do this is to use as much existing hardware and software as possible. I know the EKG signal (sorry, ECG - I'm old school, they started with the German abbreviation and I forget to say ECG now) doesn't have a very wide bandwidth, so will fit fine in an audio signal. You can use any device that will transmit audio over WiFi such as a Raspberry-Pi (rPi) or perhaps a much smaller and lower power single chip device like they sell for Bluetooth, but with WiFi instead (I think I've seen these on eBay, but not certain). An rPi-W is pretty small even if it needs a hundred mA or so to power it. > > > > > > > > > > > > Then you only have to write the app software on the PC and design a front end to isolate, amplify and filter the probe signals. I was going to say you won't need to use an ADC chip but the r-Pi only has a single channel of ADC. So maybe you'll need your ADC chip, I expect it has some specialized hardware to make the other needs easier to design. > > > > > > > > A couple of the small wi-fi devices on eBay (and other places) are the ESP-8266 and ESP-01. The ESP-01 is a more capable and secure device but will use more power. I don't know that they actually use much less power than an rPi-W but they should. They will be a little harder to program than an rPi, but a lot of the grunt work has been done in terms of getting started. The ESP-8266 in particular has quite the community even if nothing like the rPi. I don't recall what they have for analog I/O, but I think it is at least multichannel if not any more precision than 10 bits. So you might still be using your ADC. > > > > > > > > Once you start designing hardware, this is a good group to get advice on minimizing noise which will be one of your biggest problems. > > > > > > > > Rick C. > > > > > > ESP8266 has a 0-1V 10 bit adc, but it also has spi and i2c > > > > > > for simple things it is extremely simple because it is supported by the > > > arduino software all you need is a ttl level serial port > > > > I haven't worked with it but I read the major difference between this and the ESP-01 is security. It seems the ESP8266 was not designed with security in mind so might not be a good choice for medical applications. > > > the only ESP-01 I know of is the most common board with a ESP8266 on it Thank you for catching that. I meant the ESP32. This is a faster dual CPU with encryption hardware, but from the same folks as the ESP8266. Rick C.
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| From | jrwalliker@gmail.com |
|---|---|
| Date | 2018-10-03 08:39 -0700 |
| Message-ID | <8d5df944-4a7c-4608-92f1-bd9c359af282@googlegroups.com> |
| In reply to | #518205 |
On Wednesday, 3 October 2018 16:21:08 UTC+1, George Herold wrote: > > Can somebody give me any suggestions !! > > School project or work project? how much time? > If you don't know what to do it's often best to separate the problem > into many smaller pieces. > Input/convert data, transmit data, display data. > You can start with any piece. > Do you have any experience with any of that? > Something else to consider is how the requirements for your project fit in with readily available commercial devices that you might be able to adapt. That way, you might reduce the number of areas where you have to start from the beginning. For example, what is the frequency range of your ECG signal and what range of signal levels do you need to transmit? How does this compare with the performance of existing products that transmit audio over WiFi or Bluetooth. If they don't quite match can you adapt them so that they do? Will they distort the ECG in a way that matters? If this is a "school" project, then the most important question to answer is: "What does the examiner want?" You will almost certainly have been given some strong hints about this. Think about how marks will be allocated for different parts of the project and avoid spending too much time on the parts that are most fun at the expense of getting marks from other parts. Keep notes about how you made your design choices so you can include them in your report. That way you can get marks for things that may not have been fully completed. John
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| From | mukhtar1042@gmail.com |
|---|---|
| Date | 2018-10-03 08:50 -0700 |
| Message-ID | <cd3c0b97-3255-4400-a9fa-b21b60989e96@googlegroups.com> |
| In reply to | #518210 |
On Wednesday, October 3, 2018 at 8:39:51 PM UTC+5, jrwal...@gmail.com wrote: > On Wednesday, 3 October 2018 16:21:08 UTC+1, George Herold wrote: > > > > Can somebody give me any suggestions !! > > > > School project or work project? how much time? > > If you don't know what to do it's often best to separate the problem > > into many smaller pieces. > > Input/convert data, transmit data, display data. > > You can start with any piece. > > Do you have any experience with any of that? > > > Something else to consider is how the requirements for your project fit > in with readily available commercial devices that you might be able to > adapt. That way, you might reduce the number of areas where you have > to start from the beginning. > > For example, what is the frequency range of your ECG signal and what > range of signal levels do you need to transmit? How does this compare > with the performance of existing products that transmit audio over > WiFi or Bluetooth. If they don't quite match can you adapt them so > that they do? Will they distort the ECG in a way that matters? > > If this is a "school" project, then the most important question to > answer is: "What does the examiner want?" > > You will almost certainly have been given some strong hints about > this. Think about how marks will be allocated for different parts > of the project and avoid spending too much time on the parts that > are most fun at the expense of getting marks from other parts. > > Keep notes about how you made your design choices so you can include > them in your report. That way you can get marks for things that > may not have been fully completed. > > John Ok thanks
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| From | Jeff Liebermann <jeffl@cruzio.com> |
|---|---|
| Date | 2018-10-03 18:19 -0700 |
| Message-ID | <jhnard10ki5lpni2elkih04mucud54ltrn@4ax.com> |
| In reply to | #518185 |
On Wed, 3 Oct 2018 04:58:14 -0700 (PDT), mukhtar1042@gmail.com wrote: With all due respect, it is not a great idea to propose an implementation solution before you define what you are trying to accomplish and before you review how others have accomplished the same or similar thing. >Hi fellows . I am doing a project of " Real time ECG monitoring >of Patients using Wifi " . Note that most wireless cardiac monitors already use the 2.4Ghz wi-fi band for telemetry from 2400.96 to 2482.56MHz. There is also a 608.48 - 631.52MHz band available, but with fewer and narrower channels. However, these do NOT use 802.11b/g/n spread spectrum modulation. They use FM modulation and 80KHz wide channels on 600Mhz, and 320KHz wide channels on 2.4GHz (about 256 channels). The modulation is analog done with multiple V/F (voltage to frequency) converters crammed into the channel bandwidth. The V/F converters are inside the remote monitor. The modulation frequencies are demodulated in the receiver, and somehow converted to a digital format that can be displayed, stored, and recorded. The reason for doing it that way is the system should be able to handle 256 transmitters, each with up to 10 cables and contacts. 256 wi-fi transmitters in a single room will probably not work. A few years ago, I had the displeasure of having the two stents installed in my heart, which entitled me to take rehab classes. During rehab, I would beat myself up on various exercise machines while wearing one of these heart monitors. I think it was a Mortara Instruments X12P-2500 (FCC ID: HJR-X12P-2500) (now part of Hill-Rom Holdings). Here's the FCC ID page which has some good info on device: <https://fccid.io/HJR-X12P-2500> Looks like no block diagram or schematic, but at least they have a user manual: <https://fccid.io/HJR-X12P-2500/Users-Manual/Manual-490116> >I would like to know how can ESP8266 wifi module transmit the analog >recorded signal of the ECG of any patient wirelessly & then display >that signal digitally ( In form of Graph ... Proper ECG signal ) >through this wifi module by using a server, on another Laptop/Android >mobile ... basically , to display that ECG signal acquired onto a >Graphical User Interface on a laptop/pc. Wi-Fi is not a good solution. All 802.11 type wi-fi does is encapsulate 802.3 ethernet packets inside 802.11 wireless packets, deliver them to a similar wi-fi device, which then converts them back to ethernet packets. In other words, a wireless bridge. If you don't have ethernet packets to start with, then wi-fi is an added complexity that you probably don't need or want. >If somebody help me with the proper Arduino code , hardware & >software schematics , Circuit diagram , proper connections ... > >I am unable to understand the circuit diagram of this project >and the main problem in this project is transmission of analog >signal using arduino & a wifi module ... > >Instead of ESP8266 wifi module , can i use bluetooth module >with arduino for transmission of ECG signal ... > >Can somebody give me any suggestions !! All the aforementioned involve ethernet or wi-fi, which I consider superfluous. Keep it simple. In a 230Khz bandwidth, you can probably cram 5 channels (up to 10 sensors, some wired as differential) into this space at about 20 KHz/channel. So, you have 5 V/F converters (or one DSP chip) and 5 channels running at (for example) 10 -> 30KHz 35 -> 55KHz 60 -> 80KHz 85 -> 105KHz 110 -> 130KHz or something like that. These "tones" are transmitted by an analog FM 2.4GHz transmitter with a 256 channel synthesizer. See bottom of XP12P user manual for available frequencies. The FM modulated signals are received by an FM receiver, which demodulates each "tone", and converts them to a digital words using a simple digital counter (or a DSP chip). Once in digital format, you can feed the data to a computah through a multiplexor and draw pretty pictures on the screen. Note that there are other modulation formats that could be used effectively, but a V/F is probably the simplest. <http://www.analog.com/en/parametricsearch/11006> <http://web.mit.edu/6.101/www/s2014/projects/jbmaswan_Project_Final_Report.pdf> This is really ancient technology. There are probably patents available with more details. Good luck and feel free to ask if something isn't clear. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
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