Bartłomiej Zimoń

@nerdosity please paste debug log from serial connection :) what module you use?

@Omemanti so if it helps this could be hardware issue can you put here screenshot with flash configuration? and maybe photo of module?

thanks, now someone can confirm this please fill another issue for your mqtt problem or ... find similar one already filled ;)

Please describe your connections/wiring

please draw/explain your configuration, thanks

id device a or b is Arduino with ELClient library, it is possible :)

if so, esp-link need some improvement here ;) why not like this: - map tcp connection to virtual com port on PC with one of https://superuser.com/questions/54723/any-free-application-to-redirect-serial-communication-to-tcp-ip - pc -> virtual...

Please provide bootlog from serial port (from 2.2 and 3.0) Also please try latest beta firmware 3.1.x these old ones are not supported right now Will try to check if...

need to check... if it is possible

@liklev please test this firmware: [esp-link-v3.2.47.alpha.5-ga0d3bb3-dirty-Lucjan.tgz.zip](https://github.com/jeelabs/esp-link/files/3373069/esp-link-v3.2.47.alpha.5-ga0d3bb3-dirty-Lucjan.tgz.zip)