@NeverDie I would sure hope it would be faster, otherwise no point in doing it. You can change the circuit so that the ESP8266 doesn't even have power unless it gets an external trigger. From the video this needs some kind of external trigger either way. I would have to test it to be sure, but it sounds like it's booting fresh each time, so I don't see how it could be faster.

@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).