go-modbus
Modbus client and server: TCP, RTU, ASCII, TLS and UDP, typed register codecs, pooling and retries.
go get github.com/otfabric/go-modbusCLI tools
sunspecctl
Detect, list, read and poll SunSpec inverters, meters and batteries, and serve a simulated device from a JSON file or a capture of a real one.
Protocols
- 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 and served over Modbus.
The README on GitHub has the full feature list, examples and changelog.
Related projects
go-sunspec
SunSpec over Modbus, both sides: discovers and decodes 112 built-in models into typed, scaled values, and serves simulated or real SunSpec devices.
go get github.com/otfabric/go-sunspecmodbus-simulator
Deterministic, stateful Modbus TCP and TLS device simulator driven by JSON fixtures, with fault injection, request traces and CI assertions.
modbusctl
Identify, fingerprint, scan, poll, decode and write Modbus devices. Record to MCAP and replay as a simulator.
go-serial
Cross-platform serial ports for RS-232 and RS-485, with a Modbus RTU preset.
go get github.com/otfabric/go-serialmodbus-interop
Modbus TCP reference stacks: libmodbus, PyModbus, digitalpetri, NModbus and tokio-modbus.
SunSpec Explorer
Connect to a SunSpec inverter, meter or battery and see every model it exposes fully decoded. Read once or poll, record and export, without ever writing to the device.