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Re: UART connection between ATSAMD20 and ATtiny4313

From pozz <pozzugno@gmail.com>
Newsgroups comp.arch.embedded
Subject Re: UART connection between ATSAMD20 and ATtiny4313
Date 2023-05-09 17:08 +0200
Organization A noiseless patient Spider
Message-ID <u3dnkf$7v64$3@dont-email.me> (permalink)
References (8 earlier) <31a5543f-eb84-4c30-9f9e-d230e55f22dan@googlegroups.com> <u3a8t2$3q8ss$1@dont-email.me> <u3avvm$1ql$1@reader2.panix.com> <u3b739$3q8ss$2@dont-email.me> <u3bhcv$7go$1@reader2.panix.com>

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Il 08/05/2023 21:09, Grant Edwards ha scritto:
> On 2023-05-08, pozz <pozzugno@gmail.com> wrote:
>> Il 08/05/2023 16:12, Grant Edwards ha scritto:
>>> On 2023-05-08, pozz <pozzugno@gmail.com> wrote:
>>>> Il 07/05/2023 23:27, Rick C ha scritto:
>>>>
>>>>> I don't know about where you live, but doorbells in the US are
>>>>> powered from low voltage, so they don't require all the safety
>>>>> precautions.
>>>>
>>>> So you have a dedicated power supply for doorbells?
>>>
>>> Yes. A small transformer that costs a couple dollars. It allows use of
>>> far cheaper wiring and switches than would be required for 120V and
>>> avoids requirements for approved junction boxes, etc.
>>
>> I understand a small transformer is cheap, but anyway it's cheaper and
>> simpler not having it at all.
> 
> It's hard to see how the installed cost could cheaper. Using 16V
> allows use of much cheaper wire, you don't need to install junction
> boxes or conduit, the routing requirements for mains voltages don't
> apply, and you don't need a certified electrician to do the work.

Yes, of course. Anyway, most of the time the doorbell is installed by 
the certified electrician during a renovation or during construction of 
a new building. In this case, you already have a lot of cables and you 
can share already present conduits and junction boxes.


>> Here cables for doorbells are routed together with other cables, for
>> example for lightning, so they uses the same junction boxes.
> 
> There's a junction box on the outside of the house for light switches?

Only the frame for push-buttons. Junction boxes are inside the house. On 
the floor of 2-3 apartments, it could be a junction box for common 
assets, such as common lights, antennas, elevator and so on.


>> Moreover the push-button for the doorbell is identical to the one used
>> to switch on a lamp. It's not uncommon to have a 230Vac frame with
>> push-button for doorbell, push-button to activate outdoor lamps and a
>> RFID reader to disable the anti-burglar system. All these three elements
>> in a frame like this.
>>
>> [1] https://i.ebayimg.com/images/g/1q0AAOSw7Wtd4lsd/s-l1600.png
> 
> Those switches are on the outside of the house and one of them is the
> doorbell button?

Outside, not outdoor. Yes, one of this is the pushbutton of the doorbell.

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Thread

UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-04-26 16:56 +0200
  Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-26 17:57 +0200
    Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-04-26 22:40 +0200
      Re: UART connection between ATSAMD20 and ATtiny4313 Grant Edwards <invalid@invalid.invalid> - 2023-04-26 21:00 +0000
        Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-26 17:20 -0700
        Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-04-27 10:15 +0200
  Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-26 09:26 -0700
    Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-04-26 22:44 +0200
      Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-26 17:10 -0700
        Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-27 09:17 +0200
        Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-04-27 10:28 +0200
          Re: UART connection between ATSAMD20 and ATtiny4313 Andrew Smallshaw <andrews@sdf.org> - 2023-04-27 13:28 +0000
            Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-27 09:22 -0700
              Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-28 09:48 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-28 01:55 -0700
            Re: UART connection between ATSAMD20 and ATtiny4313 Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2023-04-27 20:18 +0300
              Re: UART connection between ATSAMD20 and ATtiny4313 Ulf Samuelsson <ulf.r.samuelsson@gmail.com> - 2023-04-27 23:03 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2023-04-28 09:58 +0300
              Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-27 17:45 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2023-04-28 10:00 +0300
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-28 00:21 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2023-04-28 11:43 +0300
                Re: UART connection between ATSAMD20 and ATtiny4313 Ulf Samuelsson <ulf.r.samuelsson@gmail.com> - 2023-04-28 11:10 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2023-04-28 17:26 +0300
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-28 02:14 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-28 02:19 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-28 14:51 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-28 16:41 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-29 18:01 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-30 02:37 -0700
          Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-27 09:02 -0700
            Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-28 15:01 +0200
              Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-04-28 16:44 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-04-29 17:59 +0200
  Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-03 18:16 +0200
    Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-03 09:40 -0700
      Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-04 10:34 +0200
        Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-05-04 12:31 +0200
          Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-05 10:51 +0200
            Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-05-05 12:59 +0200
              Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-05 18:01 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Dimiter_Popoff <dp@tgi-sci.com> - 2023-05-05 19:52 +0300
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-07 23:20 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-05 11:37 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-07 23:21 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-05-08 08:37 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-08 09:24 +0200
            Re: UART connection between ATSAMD20 and ATtiny4313 Grant Edwards <invalid@invalid.invalid> - 2023-05-05 20:16 +0000
              Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-07 23:17 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-07 14:27 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 David Brown <david.brown@hesbynett.no> - 2023-05-08 08:34 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Dimiter_Popoff <dp@tgi-sci.com> - 2023-05-08 13:46 +0300
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-08 09:38 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Grant Edwards <invalid@invalid.invalid> - 2023-05-08 14:12 +0000
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-08 18:13 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-08 11:39 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-09 17:04 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-09 14:32 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-10 08:55 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Grant Edwards <invalid@invalid.invalid> - 2023-05-08 19:09 +0000
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-09 17:08 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-08 07:32 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-08 18:27 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-08 11:52 -0700
                Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-09 16:52 +0200
                Re: UART connection between ATSAMD20 and ATtiny4313 Grant Edwards <invalid@invalid.invalid> - 2023-05-09 15:10 +0000
                Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-09 14:29 -0700
        Re: UART connection between ATSAMD20 and ATtiny4313 Rick C <gnuarm.deletethisbit@gmail.com> - 2023-05-04 06:21 -0700
          Re: UART connection between ATSAMD20 and ATtiny4313 pozz <pozzugno@gmail.com> - 2023-05-05 11:02 +0200

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