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plusvic / simplebus2-intercom

General description of the Simplebus2 protocol used by some Comelit's intercoms. Hardware for retransmitting Simplebus2 messages over UART.
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PIC12F508 #3

Open pcalabrese opened 2 years ago

pcalabrese commented 2 years ago

Hi!, Very helpful and complete protocol description! Congrats!!

I was wondering if the PIC12F508 can be more easily replaced with a ESP8266 or other chip easier to find / program.

I've read about your first prototypes with 433MHz transceiver and/or ESP8266. Could you share more details about?

Still Many Thanks for your great job!

plusvic commented 2 years ago

Hi, in theory you can replace the PIC12F508 with an ESP8266, but it would need a new program for decoding the signal and probably a new circuit. The ESP8266 is a lot more power hungry than the PIC12F508, that's why I ended up using the latter.

My tests with the ESP8266 where very limited, I just tried to power it from the intercom line, but it dropped the voltage too much, so I decided to switch to the PIC12F508. In theory it could be done, as the intercom line is able to power much larger devices with video screens, which require a lot of power, but I'm not an electronics expert didn't know how to do it properly.

Gurkenflieger commented 1 year ago

Hello, do you still have your code from the ESP testing? I think that the voltage regulater overheats and it could be possible to implement a buck converter to drive an esp.

But overall i will first test the HC 12 and PIC layout. Unfortionately there is no easy way to implement HC 12 and ESPHome.

plusvic commented 1 year ago

I didn't wrote the code for the ESP, I dropped the idea of using ESP very early in the design phase.