SMA Modbus

Introduction

The module provides easy access to the data provided by SMA devices with ModBus support.

It automatically establishes a new connection on disconnect, and parses incoming byte data to their respective format.

Typescript definitions are included out-of-the-box.

Usage

Common requests are included for some devices, such as:

• current battery percentage of Sunny Island devices
• power of Sunny Boy devices
• total production of Sunny Boy devices
• etc.

If more advanced requests are required, the library provides a easy method to access all registers with automatic data parsing.

The register values can be found on SMAs website under "Downloads" -> "Technical Information" -> "Modbus Interface". An Excel file containing all registers with datatype and description can be downloaded.

Examples

// require or import can be used to acquire the package
const SMA = require('sma_modbus');
let sunnyIsland = new SMA.SunnyIsland("192.168.188.60", 502);
sunnyIsland.getPower().then((x) => {
        console.log("Power: " + x + " W");
});

// Modbus addresses and datatypes can be found in the SMA docs
sunnyIsland.readModbus(40073, SMA.ModbusDatatype.uint16).then((x) => {
    console.log("Interface speed: " + x + " Mb/s");
});