A simple Modbus client library for Myriota edge devices. The library is intended to support Myriota edge devices (Master) communicating to Modbus sensors devices (slaves) via a serial interface (RS484/RS232). The library currently only supports RTU framing, however ASCII Framing maybe added in future releases.

Modbus Protocol Function Support

The library currently only supports a subset of the Modbus Protocol

Function Code	Supported
Read coils	✅
Read discrete inputs	✅
Read holding registers	✅
Read input registers	✅
Write single coil	✅
Write single register	✅
Read exception status	❌
Diagnostics	❌
Comm event counter	❌
Comm event log	❌
Write multiple coils	✅
Write multiple registers	✅
Report slave id	❌
Read file record	❌
Write file record	❌
Mask write register	❌
Read write multiple registers	❌
Read fifo queue	❌
Encapsulated interface transport	❌