ESP8266 Community Forum

Hello world I uploaded cnlohr client program from
https://github.com/cnlohr/esp8266_link_test
It’s runs perfect perhaps too well the problem is I think that code was meant for esp-01
But I eve managed to install it on NodeMCUesp8266 amica board and nowI can’t upload new code someone help I’m using esp tool in Ubuntu when I try to upload new code it says connecting and never connects or initiate upload
I did manage to jump I believe the d3 which is gpio 0 to ground and when I did that and attempted upload it said 0x20 invalid packet adresss

The code you installed was likely meant for the ESP-01 module, which may have different pinouts or functionality than the NodeMCUesp8266 amica board.

One potential solution could be to try reflashing the firmware on the NodeMCUesp8266 amica board using the esptool.py command-line tool. This will completely wipe the current firmware and allow you to start fresh with a new program.

Additionally, it is also important to ensure that the correct serial port is selected and that the board is in the correct mode (usually "flash" mode) before attempting to upload new code.