ESP32-C3 Super Mini cabel AddOn

A Cable Add-On to Communicate with Proprietary Mahr Hardware from 2000: The Mahr Extramess 2001Hardware SetupWe used two main hardware components:ESP32-C3 Super MiniA compact and inexpensive microcontroller that supports USB and UART communication: Buy on AliExpressM8 4-Pin CableUsed to connect the ESP32 to the Mahr Extramess 2001: Buy on AmazonThe ESP32 acts as a middleman between the legacy serial connection on the Mahr device and a computer via USB. It sends queries and parses incoming measurements, outputting them in a format suitable for logging or analysis.Why did we build this? Because the original cable from the supplier costs €111 — mostly due to a built-in FTDI controller — and the official software only allows one data request per second, which is far too slow for practical use.To solve this, we reverse-engineered the communication protocol between the MahrConnect software and the Mahr Extramess 2001. We discovered that the software only looks for a specific device name on t