→ GND ├── Pin 5 (Green - TX) → Pin 3 (optional, for future LED control) ├── Pin 6 (Yellow - RX) → Pin 2 (Arduino RX from keyboard) └── Pin 8 (Red - +5V) → VCC (+5V) Note: You only need to connect 3 ...

A generic firmware for an ESP32 to be used as a Modbus TCP/IP gateway for any modbus RTU device. Default RX/TX pins for the TTL-RS485 communication are used from hardware-serial2 (check pinout of your ...