@neverdie I like the discussion as I like the ESP features, especially because of much mor RAM and Flash (also ESPnow etc.). However, I think the biggest problem so solve is not only to introduce a new protcol like ESPnow (which I and my friends have tried successfully) but the drastic code changes in MySesnors core as the ESP chips (8266, 8285, ESP32) do a reboot/wartstart after a deep sleep wakeup and that is completely different than AVR/ATMEGA chips like the 328p which continues right after the sleep command. I have a newer discussion with the MySensors main developers on that. So even if ESP8266 or ESP32 is yet supported, the sleep command is not supported (check the recent code, it will return false and does not sleep). Thus the ESP's can only be used as Gateways or always power on MySensors devices.

@m26872 said in Encapsulated transformers instead of traditional switching power supplies like Hi-Link: for me the sunny season is too short. I havn't yet tried to use solar batteries in winter so maybe I have the same problems (despite the fact that I'm living 3 degrees south of you), but I have backup solution for very cloudy winter days - regular battery charger.

Hi, nice projet. I am very interested in it. But why you are using 5 V and not 3.3 V? The ATmea328 works with 3.3 V too and the NRF have to use 3.3 V. The only restriction on 3.3 V is the clock limitation for the Atmega (8 MHz). But with no crystal it don't care. For example you could use an HLK-PM03 instead of HLK-PM01 and remove the linear voltage regulator. So you get more space an everything have the same voltage level. And another point is, it is recommended to use a capacitor (0.1 µF) to ground for each voltage pin (Vcc, Avcc, Aref).