GitHub - ethicstechOSS/Modbus-Slave: A library that allows your Arduino or MSP to communicate via Modbus protocol, acting as a slave. Supports serial (RS-232, RS-485), LoRa RN-2483 and IP via Ethernet (Modbus IP).
Modbus RTU Master Library tests with Arduino Part 1 – PDAControl
Una Soluzione Combinata per il Controllo delle Macchine | Eurotherm Limited
GitHub - liyanboy74/modbus: MODBUS RTU library for STM32 STM8 AVR LPC & more