Reworked service to have dynamic mqtt topics (multiple em24 via ports) and added 3 phase functionality.

MQTT topics

Voltage L1: #prefix#/voltage1
Voltage L2: #prefix#/voltage2
Voltage L3: #prefix#/voltage3

Current L1: #prefix#/current1
Current L2: #prefix#/current2
Current L3: #prefix#/current3

Total Power: #prefix#/power
Power L1: #prefix#/power1
Power L2: #prefix#/power2
Power L3: #prefix#/power3

Import kwh: #prefix#/import
Export kwh: #prefix#/export

HZ: #prefix#/hz

Description

Works with Victron Energy ESS

Subscribe to a local MQTT broker and make energy data available on a Modbus server

sml_smartmeter --> MQTT broker --> em24 <-- Victron

Thanks to https://github.com/stephane/libmodbus

Installation

apt install libmodbus5 libmodbus-dev

cp em24.service /etc/systemd/system/
systemctl enable em24.service
systemctl start em24.service