Allows an Arduino to act as the "Controller," initiating requests to various sensors or PLCs on a network.

Overall, SimpleModbus is a reliable and easy-to-use library for communicating with Modbus devices. While it may lack advanced features, its simplicity and flexibility make it a popular choice among developers.

// Read 2 holding registers from slave ID 1, starting at address 0 modbus_request(1, READ_HOLDING_REGISTERS, 0, 2, readRegs); delay(100);

unsigned int readRegs[10]; unsigned int writeRegs[10];