Asynchronous requests example?

[ihormelnyk]

Asynchronous requests example?

[miksumin]

Look here - https://github.com/miksumin/OpenTherm/tree/master/examples/OpenThermMaster_Async

[ProphetOfDoom]

I know it's been a while since the above post, but I thought I'd add my recent observations.

I flashed the following Arduino sketch by the same author as above to my ESP32-DevkitC-V4 board with DiyLess ESP32/ESP8266 Thermostat Shield, connected to my (nearly new) Baxi 824 System Boiler.

https://github.com/miksumin/OpenTherm/tree/master/examples/OpenThermTestIDs

This produced the attached output, but worringly, left the boiler flashing an E83 (Communication Error) message, which repeatedly returned after disconnecting the ESP32 kit and power cycling the boiler to return to Hive 230v control. I couldn't find anything online on how to clear this error message, but eventually reasoned that it might have been due to the final request/response in the above sketch returning an error, as shown in the log. So, I then flashed the ESP32 with a simple sketch that periodically just gets the boiler temperature as shown below, and to my great relief, this cleared the boiler error message.

  // Get Boiler Temperature
  ch_temperature = ot.getBoilerTemperature();
  Serial.println("CH temperature is " + String(ch_temperature) + " degrees C");

Looking at the output log, it seems that my Baxi 824 System Boiler is OpenTherm 4.0, information I surprisingly couldn't find in any of the manuals or online!

Hope this helps someone.

arduino_output.log