Debug Serial over WiFi (Serial2Telnet)
Posted: Tue Sep 30, 2025 4:38 pm
Since I have several projects far away from my PC and also a laptop will not suffice, I wrote some software to debug anything with RS232 output over the air.
Essentially a Serial to Telnet Interface.
You'll need a NodeMCU/ESP8266. Might work with ESP32 (Not Tested).
Just connect your projects' RS232 TX output to the RX input. You also need GND of course.
Power externally with a battery(pack), PSU or from your project if it has 5V or 3V3
Starts with a WifiManager. Connect to this AccessPoint with your phone/tablet. Enter the IP credentials of you network.
You can set the Baudrate via Telnet.
https://github.com/arjenv/Serial2Telnet
Essentially a Serial to Telnet Interface.
You'll need a NodeMCU/ESP8266. Might work with ESP32 (Not Tested).
Just connect your projects' RS232 TX output to the RX input. You also need GND of course.
Power externally with a battery(pack), PSU or from your project if it has 5V or 3V3
Starts with a WifiManager. Connect to this AccessPoint with your phone/tablet. Enter the IP credentials of you network.
You can set the Baudrate via Telnet.
https://github.com/arjenv/Serial2Telnet