Bartłomiej Zimoń

@Capiten with: RX(pin0) ----[>]---- TX pin? maybe test first if your mega board get some information from esp-link, upload this scetch via USB: ``` void setup() { Serial.begin(115200); } void...

use of diode depends on mega board design (usb bridge chip etc.) in fact it is possible to use avrdude directly with explicity stk500v2 protocol, but this uses direct connection...

https://github.com/jeelabs/esp-link/issues/480#issuecomment-577457913 please try it

@Capiten any update?

@jharwinbarrozo @baervers23 I can try to add signatues to test build if you want to try?

but you both need to reflash optiboot one more time ;)

@jharwinbarrazo @baervers23 mega 2560 + atmega32u4 added for test [esp-link-v3.2.47.alpha.22-g6895442-dirty-Lucjan.tgz.zip](https://github.com/jeelabs/esp-link/files/4100794/esp-link-v3.2.47.alpha.22-g6895442-dirty-Lucjan.tgz.zip)

why you need different port?

you can redirect it on localhost

what about 2323 port?