Protocol libraries

go-sunspec

SunSpec over Modbus: discovers 112 built-in models and decodes typed, scaled values. Includes the sunspecctl CLI.

Install

go get github.com/otfabric/go-sunspec

Modbus: The most widely deployed protocol in industrial automation: meters, inverters, batteries, drives and PLCs.
SunSpec: Standard register maps for solar inverters, meters, batteries and other DER equipment, read over Modbus.

The README on GitHub has the full feature list, examples and changelog.

Modbus client and server: TCP, RTU, ASCII, TLS and UDP, typed register codecs, pooling and retries.

go get github.com/otfabric/go-modbus

Deterministic, stateful Modbus TCP device simulator driven by JSON fixtures, for integration tests.

Identify, fingerprint, scan, poll, decode and write Modbus devices. Record to MCAP and replay as a simulator.

Cross-platform serial ports for RS-232 and RS-485, with a Modbus RTU preset.

go get github.com/otfabric/go-serial

Modbus TCP reference stacks: libmodbus, PyModbus, digitalpetri, NModbus and tokio-modbus.