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The internet of things, or the internet that sings?

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Whatever, been playing with those POE powered sensors,
small box, yesterday and 2day was the turn for a CO sensor.

Using a MQ-7 sensor, small boxes arrived, could finally put something together:
 http://www.panteltje.com/pub/CO_sensor_POE_UDP_PCB_IMG_6203.JPG
The upside-down sub-board is an ebay ethernet module, but it only has a ENC28J60 chip on it and I already replaced the ethernet connetor,
so next time I will just use the chip.. simpler,
domne that in my LED controller.

Anyways, this is NOT for 48 V POE but for <= 24 V, mainly because of the LM2296
Use an other sjip for higher voltage,

This is what the ciruit looks like in pencil:
 http://panteltje.com/pub/CO_sensor_UDP_POE_circuit_diagram_IMG_6204.JPG

And the test code (do not use, I have changed the 60 / 90 second delays to just 4 seconds...
else testing takes so long.. 
 http://panteltje.com/pub/co_sensor_udp_MQ-7_first_test_do_not_use_.asm
  anyways that is clearly marked in the code as ; WAS TEST 
  other things need checking too)

So, it sends UDP to some IP address and you probably noted the 2 x 4 holes on the board,
well the firts 4 are for the PIC programmer, and the other 4 for logic level RS232 for config,
if you type 'h' it shows this menu:

Panteltje (c) co_sensor_udp_MQ-7-0.1
                                    
                                    
      Commands
AnnnENTER       set source IP address A.xxx.xxx.xxx  saved in EEPROM
BnnnENTER       set source IP address xxx.B.xxx.xxx  saved in EEPROM
CnnnENTER       set source IP address xxx.xxx.C.xxx  saved in EEPROM
DnnnENTER       set source IP address xxx.xxx.xxx.D  saved in EEPROM
EnnnENTER       set destination IP address E.xxx.xxx.xxx  saved in EEPROM
FnnnENTER       set destination IP address xxx.F.xxx.xxx  saved in EEPROM
GnnnENTER       set destination IP address xxx.xxx.G.xxx  saved in EEPROM
HnnnENTER       set destination IP address xxx.xxx.xxx.H  saved in EEPROM
LnnnnnENTER     set source port, saved in EEPROM                         
PnnnnnENTER     set destination port, saved in EEPROM
S               show data on serial out              
s               do not show data on serial out, default.
v               print status, IP address, ports, and MACs
WnnnnnENTER     CO alarm beeper level, default 17, to disable local alarm beeper use 65535
XnnnENTER       PWM 1.5V level, default 29                                                
h               help (this)               

On the receiving side you could do
# netcat -u -l -p 1082
and then it looks like this:
392
394
392
394
398
396
395
394
394

Thse are for now actually ADC steps (x/1024 at 4.096 V PIC internal reference output from sensor into resistor),
so you need to calibrate and do that log thing,
have not decided yet if I wil do that on board or at the RX end (an UDOP server is running for all the sensors)

The missing thing here (see circuit diagram) is the alarm beeper / driver transistor,
as my alarm beeper did not fit in the box,
maybe I will find a smaller one.

So, that was / is the weekend tronix.

Linux snort:
05/21-17:43:23.853504 01:02:03:04:05:0B -> B8:27:EB:0A:2C:43 type:0x800 len:0x40
192.168.178.82:1082 -> 192.168.178.73:1082 UDP TTL:128 TOS:0x0 ID:46078 IpLen:20 DgmLen:33
Len: 5
33 39 30 0D 0A                                   390..

Food pizza!
The smell of molten lead...
I am still alive...


PS you have to think of a MAC addres for this thing, it is a #define in the code.
I keep making my own MACs.

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Thread

The internet of things, or the internet that sings? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-21 15:46 +0000
  Re: The internet of things, or the internet that sings? Don Kuenz <g@crcomp.net> - 2017-05-21 23:07 +0000
    Re: The internet of things, or the internet that sings? Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-22 08:02 +0000
    Re: The internet of things, or the internet that sings? co_pic website now up Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 10:02 +0000
    Re: The internet of things, or the internet that sings? co_pic website now up Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 17:25 +0000

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