aps2mqtt 1.2.0

Access APSystems ECU data over MQTT

APS2MQTT

Allows you to access your APsystems Energy Communication Unit (ECU) data by MQTT. This MQTT bridge queries the ECU directly at regular interval for new data, parse the returned data and publish them over MQTT.

In this way you can integrate your APsystems devices with whatever smart home infrastructure you are using.

:warning: It currently supports only one ECU.

Acknowledgements

This work is based on the awesome homeassistant-apsystems_ecur (v1.2.30). This couldn't have been done without their hardwork.

Prerequisites

See full version

• A compatible APSystems ECU
  • ECU-B
  • ECU-R
  • ECU-C
• Some inverters
  • YC1000/QT2
  • YC600/DS3/DS3-H/DS3-L/DS3D
  • QS1/QS1A

Your ECU needs to be fully configured by the EMA Manager and should have a fixed IP address. APS2MQTT should run on a machine in the same network (or in an accessible one) as the ECU.

ECU-C and modern ECU-R (ID starting with 2162) can be automatically restarted in case of connection error. For older ECU-R and for ECU-B, the restart need to be done manually.

Test your connection

See full version

You can test the connection between APS2MQTT and the ECU using Netcat. From your terminal, run the following command (assuming your ECU IP address is 192.168.1.42) to open the connection

nc -v 192.168.1.42 8899

ECU should response with an "open" message

192.168.1.42 (192.168.1.42:8899) open

Connection is now established, the ECU is ready to receive commands

APS1100160001END

If this command return with an APS message, you are ready to start APS2MQTT. If not, rebbot your ECU and try again.

Install

Binaries are available in the release asset or on PyPI. Using a virtual env is recommended for better insulation.

# with PyPI
pip3 install aps2mqtt
# manually 
pip3 install aps2mqtt-[version]-py3-none-any.whl

Start it

python3 -m aps2mqtt -h

Run as a service

Using systemd, APS2MQTT can be started automatically

[Unit]
Description=APS2MQTT
After=multi-user.target

[Service]
Type=simple
User=user
Restart=on-failure
ExecStart=/path-to-your-venv/python3 -m aps2mqtt -c config.yaml

[Install]
WantedBy=multi-user.target

Configuration

APS2MQTT configuration can be provided by a yaml config file or by environment variables (in a container context for example).

MQTT

Key	Description	Example	Default value
MQTT_BROKER_HOST	Host of the MQTT broker	"192.168.1.1", "broker.hivemq.com"	"127.0.0.1"
MQTT_BROKER_PORT	Port of the MQTT broker	1883	1883
MQTT_BROKER_USER	User login of the MQTT broker	"john-doe"	""
MQTT_BROKER_PASSWD	User password of the MQTT broker	"itsasecret"	""
MQTT_CLIENT_ID	Client ID if the MQTT client	"MyAwesomeClient"	"APS2MQTT"
MQTT_TOPIC_PREFIX	Topic prefix for publishing	"my-personal-topic"	""
MQTT_BROKER_SECURED_CONNECTION	Use secure connection to MQTT broker	True	False
MQTT_BROKER_CACERTS_PATH	Path to the cacerts file	"/User/johndoe/.ssl/cacerts"	None

ECU

Key	Description	Example	Default value
APS_ECU_IP	IP of the ECU	"192.168.1.42"	None, this field id mandatory
APS_ECU_PORT	Communication port of the ECU	8899	8899
APS_ECU_TIMEZONE	Timezone of the ECU	'Europe/Paris'	None (use system timezone)
APS_ECU_AUTO_RESTART	Automatically restart ECU in case of error	True	False
APS_ECU_WIFI_SSID	SSID of the ECU Wifi :information_source: Only used if automatic restart is enabled	"My Wifi"	""
APS_ECU_WIFI_PASSWD	Password of the ECU Wifi :information_source: Only used if automatic restart is enabled	"secret-key"	""
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 :information_source: Only used if stop at night is enabled	51.49819	48.864716 (Paris)
APS_ECU_POSITION_LNG	Longitude of the ECU, used to retrieve sunset and sunrise :information_source: Only used if stop at night is enabled	-0.13087	2.349014 (Paris)

Timezone

Without any specific configuration, aps2mqtt use your system's timezone as a reference.

• If you use aps2mqtt as a python application, setting the ECU timezone is recommended by setting the configuration variable 'APS_ECU_TIMEZONE' for better processing.

• If you are using aps2mqtt as a Docker image, you can configure the timezone for the whole container using the environement variable 'TZ'

Example

Unsecured connection

ecu:
  APS_ECU_IP: '192.168.1.42'
  APS_ECU_TIMEZONE: 'Europe/Paris'
  APS_ECU_STOP_AT_NIGHT: True
  APS_ECU_POSITION_LAT: 47.206
  APS_ECU_POSITION_LNG: -1.5645

mqtt:
  MQTT_BROKER_HOST: '192.168.1.12'
  MQTT_BROKER_PORT: 1883
  MQTT_BROKER_USER: 'johndoe'
  MQTT_BROKER_PASSWD: 'itsasecret'

Secured connection

ecu:
  APS_ECU_IP: '192.168.1.42'
  APS_ECU_TIMEZONE: 'Europe/Paris'
  APS_ECU_STOP_AT_NIGHT: True
  APS_ECU_POSITION_LAT: 47.206
  APS_ECU_POSITION_LNG: -1.5645

mqtt:
  MQTT_BROKER_HOST: 'broker.hivemq.com'
  MQTT_BROKER_PORT: 8883
  MQTT_BROKER_SECURED_CONNECTION: True

Using Docker Compose

services:
  aps2mqtt:
    image: fligneul/aps2mqtt:latest
    restart: always
    environment:
      - TZ=Europe/Paris
      - DEBUG=True
      - APS_ECU_IP=192.168.1.42
      - APS_ECU_STOP_AT_NIGHT=True
      - APS_ECU_POSITION_LAT=47.206
      - APS_ECU_POSITION_LNG=-1.5645
      - MQTT_BROKER_HOST=broker.hivemq.com
      - MQTT_BROKER_PORT=8883
      - MQTT_BROKER_USER=johndoe
      - MQTT_BROKER_PASSWD=itsasecret
      - MQTT_BROKER_SECURED_CONNECTION=True

MQTT topics

The aps2mqtt retrieve from the whole PV array as a whole as well as each individual inverter in detail.

ECU data

• aps/[ECU_ID]/power - total amount of power (in W) being generated right now
• aps/[ECU_ID]/energy/today - total amount of energy (in kWh) generated today
• aps/[ECU_ID]/energy/lifetime - total amount of energy (in kWh) generated from the lifetime of the array

Inverter data

• aps/[ECU_ID]/[INVERTER_ID]/online - True is the inverter is communicating with the ECU, False otherwise
• aps/[ECU_ID]/[INVERTER_ID]/signal - the signal strength of the zigbee connection
• aps/[ECU_ID]/[INVERTER_ID]/temperature - the temperature of the inverter in your local unit (C or F)
• aps/[ECU_ID]/[INVERTER_ID]/frequency - the AC power frequency (in Hz)
• aps/[ECU_ID]/[INVERTER_ID]/power - the current power generation (in W), sum of all panel power
• aps/[ECU_ID]/[INVERTER_ID]/voltage - the AC voltage (in V)
• aps/[ECU_ID]/[INVERTER_ID]/[PANEL_ID]/power - the current power generation (in W) of the selected panel