APsystems EZ1 MQTT gateway

This component is a Python package to gateway APsystems EZ1 inverter local API to MQTT, HomA and Home Assistant.

• Acknowledgements
• Basic Requirements
• Prerequisites
• Installation
  • Run as a service
• Configuration
  • ECU
  • MQTT
  • Timezone
• MQTT topics
• Changelog

Acknowledgements

This work is based on aps2mqtt (v1.2.0). Thanks for your work Florian L.! And thanks for the permission to switch to MIT license.

Basic Requirements

• Python (details see pyproject.toml)
• MQTT broker (e.g. Eclipse Mosquitto)
• APsystems EZ1 inverter

Prerequisites

The access to the local API is done by the APsystems-EZ1-API. Please configure the EZ1 inverter as described there.

Installation

Using a github release or a cloned git repo needs to install the dependencies manually.

clone https://github.com/hmueller01/APsystems-EZ1-mqtt
cd APsystems-EZ1-mqtt
python3.11 -m venv .venv
source .venv/bin/activate
# using pip
pip3 install -r requirements.txt
# using poetry
poetry install

Start it

python3 -m apsystems_ez1_mqtt -h

Run as a service

Using systemd, APsystems-EZ1-mqtt can be started automatically

[Unit]
Description=APsystems-EZ1-mqtt
After=multi-user.target

[Service]
Type=simple
User=user
Restart=on-failure
ExecStart=/path-to-your-venv/python3 -m apsystems_ez1_mqtt -c config.yaml

[Install]
WantedBy=multi-user.target

Configuration

APsystems-EZ1-mqtt configuration can be provided by a yaml config file or by environment variables (in a container context for example).

Using the yaml config you can copy provided template config-template.yaml e.g. to config.yaml.

Config at least the IP of the APsystems EZ1 inverter (APS_ECU_IP) and the MQTT broker settings (MQTT_BROKER_*).

If you do not need the HomA environment you can set HOMA_ENABLED: False.

If you do not need Home Assistant you can set HASS_ENABLED: False.

ECU

Key	Description	Example	Default value
APS_ECU_IP	IP of the ECU	"192.168.0.42"	None, this field id mandatory
APS_ECU_PORT	Communication port of the ECU	8050	8050
APS_ECU_UPDATE_INTERVAL	Time between the update polls	60	15
APS_ECU_STOP_AT_NIGHT	Stop ECU query during the night	True	False
APS_ECU_POSITION_LAT	Latitude of the ECU, used to retrieve sunset and sunrise ℹ️ Only used if stop at night is enabled	51.49819	52.5162 (Berlin)
APS_ECU_POSITION_LNG	Longitude of the ECU, used to retrieve sunset and sunrise ℹ️ Only used if stop at night is enabled	-0.13087	13.3777 (Berlin)
APS_ECU_TIMEZONE	Timezone of the ECU	"Europe/Berlin"	None (use system timezone)

MQTT

Key	Description	Example	Default value
MQTT_BROKER_HOST	Host of the MQTT broker	"broker.hivemq.com"	"127.0.0.1"
MQTT_BROKER_PORT	Port of the MQTT broker	8883	1883
MQTT_BROKER_USER	User login of the MQTT broker	"john-deere"	""
MQTT_BROKER_PASSWD	User password of the MQTT broker	"secret"	""
MQTT_BROKER_SECURED_CONNECTION	Use secure connection to MQTT broker	True	False
MQTT_BROKER_CACERTS_PATH	Path to the cacerts file	"/home/jd/.ssl/cacerts"	None
MQTT_CLIENT_ID	Client ID if the MQTT client	"foo"	""
MQTT_TOPIC_PREFIX	Topic prefix for publishing ℹ️ Only used if HomA is disabled	"/aps/"	""
HOMA_ENABLED	Enable HomA MQTT messages	False	True
HOMA_SYSTEMID	HomA system id ℹ️ Use inverter id if empty	"123456-solar"	''
HOMA_ROOM	HomA room to show data	"PV"	"Sensors"
HOMA_NAME	HomA name	"My PV System"	"Solar PV"
HASS_ENABLED	Enable Home Assistant MQTT messages	True	False
HASS_DEVICE_ID	Home Assistant id ℹ️ Use inverter id if empty		""
HASS_DEVICE_NAME	Home Assistant device name	"Solar PV Balkonkraftwerk"	"Solar PV"
HASS_NAME_PREFIX	Home Assistant name prefix	"Solar "	""
HASS_AREA	Home Assistant area name	"My PV System"	"Energie"

Timezone

Without any specific configuration, APsystems-EZ1-mqtt uses your system's timezone as a reference.

• It is recommented setting the timezone by the configuration variable APS_ECU_TIMEZONE for better processing.
• Alternatively, if set, the environement variable TZ is used.

MQTT topics

The APsystems-EZ1-mqtt topics depend on the configuration. If HomA is deactivated (HOMA_ENABLED: False) topics start with [MQTT_TOPIC_PREFIX], otherwise "/devices/[HOMA_SYSTEMID]/controls/" will be used.

• [topic start]Power - total amount of power (in W) being generated right now
• [topic start]Power P1 - power of channel 1 (in W) being generated right now
• [topic start]Power P2 - power of channel 2 (in W) being generated right now
• [topic start]Energy today - total amount of energy (in kWh) generated today
• [topic start]Energy today P1 - channel 1 amount of energy (in kWh) generated today
• [topic start]Energy today P2 - channel 2 amount of energy (in kWh) generated today
• [topic start]Energy lifetime - total lifetime amount of energy (in kWh) generated
• [topic start]Energy lifetime P1 - channel 1 lifetime amount of energy (in kWh) generated
• [topic start]Energy lifetime P2 - channel 2 lifetime amount of energy (in kWh) generated

If Home Assistant is enabled (HASS_ENABLED: True) Home Assistant auto config messages will be generated, like: "homeassistant/sensor/[object_id]/config"

Changelog

Version	Date	Author	Comment
0.1.0	2024-06-18	hmueller01	Inital version
0.2.0	2024-07-25	hmueller01	fix timeout issues
0.3.0	2024-09-07	hmueller01	migrated to new APsystemsEZ1 2.x API