So I have been a user of MySensors for as long as I can rememeber, probably 12 - 15 years. I am so gratteful to the peoplie that developed and nutured a complex system in a simple way.
I have hit a juncture - my gateway has failed.
Due to system location I need the wifi ethernet gateway,and have used a Lolin NodeMCU V3 for years. Now I need to reflash and I cannot get it to flash and operate with any software or IDE mix.

Is there a table of known variants of working Arduino IDE and boards and MySensors library that work together?

Alternatives to MySensors such as ESPhome will work for me, but losing the nRF2401 is going to be difficult, its robust and has worked almost flawlessly, I aslo dont wish rebuild 8 different projects around the house.

I can move to a ESP32, but the code so far fails to compile. I can use a D1 mini, lots of choice but almost no compatibility.

Any one got ideas?

@hard-shovel I had same issue and using older version worked for me too

I tried and tried with my serial gateway, and never got it to function porperly. The serial port was working I could see it and data, but OH3 just refused to recognise the data. After a week, I decided to abandon the serial and flashed a esp8266 attached the nRF to it and bobs my uncle as we say. It goes via MQTT, so takes a little more settting up but works fine. If you want more info I will dig out the pages I used to make it work.

I have an almost identical issue with me ESP MQTT gateway no longer connecting to nodes. Similar issues to start with in that it was good for a number of months then would stop, restart ok, then multiple restarts to begin working. I have now resorted to changing out the 24RF01 module and the ESP to try and locate the issue. Will let you know how I get on.

As this is the outside box, can you post pictures of the inside box controller, I think this is the key to get it on you vera box. I suspect the two buttons actually modulate a high frequency onto the two wires, as you still need to pass audio both ways and power to make it all work.