Hello

I found the problem : the config is waiting for the pin number, it is obvious as it is called my-rs485-de-pin, and not the GPIO number... So GPIO 26 is pin number 37. I put 37 in the config and it is now ok :)

Hi

I understood that the HLK-PM01 can not be directly used out of the box, and that we need to solder it to a pcb with Varistor etc. but i may be wrong

I dont have the skills to do that for something potentially dangerous. I need something that can be used out of the box and connect it directly to a wemos mini d1