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GyroGearl00se / ESPHome-Froeling-Lambdatronic_3200

ESHome RS232 to TTL - ESP32 - Read data from Froeling / Lambdatronic 3200
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UART Pins ? #5

Closed wavoigt closed 10 months ago

wavoigt commented 11 months ago

You use UART0 (GPIO1, GPIO3) for communication with 3200. This UART is hardwired with the USB-RS232 converter on the board, whitch may cause problems in this case. UART0 is also used by ESPHome for Logging, and when i'm watching the serial data, i see both the readout commands for 3200 AND the logging messages. Wouldn't it be better to use UART1 (GPIO9, GPIO10) for the 3200?

GyroGearl00se commented 11 months ago

I used uart0 just out of convenience reasons, as the two pins are right next to each other. Uart1 on the wemos is offset by one pin in each direction.

I just soldered one row of pins to the board 😃

To avoid conflicts I've set the baudrate to 0 for ESPHOME logging. (See line 9 in froeling.yaml)

But sure.. you can use uart1 as well with pins 9+10.

I might consider doing the same the next time and give a feedback here. I'll be probably able to continue with this project beginning next year. The next couple of weeks are a little bit tight.

wavoigt commented 11 months ago

Thanks so much, i appreciate your effort !

wavoigt commented 11 months ago

I tested my ESP32 with UART2 (pins 16+17) because pins 9+10 are used for the flash memory. Now, all is working fine! 1 thing: you run the RS232 converter with 5V, you should run it with 3.3V from ESP board because of the correct logic levels.

GyroGearl00se commented 10 months ago

https://github.com/GyroGearl00se/ESPHome-Froeling-Lambdatronic_3200/compare/7d0cd987a3535cbc14ca1eef222ea5998f1166fc...3adf9fb5cb31bfb3f7da55e67e511cfc505df1b3

Today I finally moved to UART2 as well :)