hansij66 / nibe2mqtt

Read Nibe S2125 heatpump via TCP Modbus and broadcast to MQTT

NIBE SMO S40 and S2125 heatpump to MQTT

MQTT client/parser for NIBE SMO S40 and S2125 heatpump. (I guess other Nibe S-series will work)

Inspired and reuse from https://github.com/yozik04/nibe-mqtt

You can download supported register list from SMO S40 This list can converted to json (see data directory, csv file is hard coded in convert_csv.py) Or use the one provided

Note, register map can change after SMO firmware upgrade

Usage:

• Copy systemd/nibe-s2125-mqtt.service to /etc/systemd/system
• Adapt path in nibe-s2125-mqtt.service to your install location (default: /opt/iot/nibe)
• Copy config.rename.py to config.py and adapt for your configuration (minimal: mqtt ip, username, password, RS485)
• sudo systemctl enable nibe-s2125-mqtt.service
• sudo systemctl start nibe-s2125-mqtt.service

Use http://mqtt-explorer.com/ to test & inspect MQTT messages

Requirements

• paho-mqtt
• pyModbusTCP
• influxdb
• python 3.x
• pandas, nibe, uni-slugify (for convert_csv)

Tested under Linux & Windows;

InfluxDB

• Use telegraf-nibe-s2125.conf as Telegraf configuration file to get Nibe MQTT data into InfluxDB

Licence

GPL v3

Versions

1.0.0

• Initial version

Limitations

• Nibe does not maintain a count on defrosts.
• A counter is implemented, reading back last value from InfluxDB v1 when parser is started
• Reading back last value from InfluxDB v2 is not supported yet
• If InfluxDB is not used, then counter is added to MQTT message