Summary

NodeJS proxy to interact with Wallbox Pulsar, Pulsar plus - and maybe other wallboxes as well from https://wallbox.com/.

Supported interactions:

• Configurable root topic, here: "wallbox/"
• On a regular basis (polling required, API does not support subscribe) poll charger(s) and status from upstream API. Expose charger info via

wallbox/<chargerId>/status
wallbox/<chargerId>/locked
wallbox/<chargerId>/maxCurrent

• Status is derived from display name of Web API, typical messages are:

  • Paused by user
  • Charging
  • Done
  • Connected: waiting for car demand
  • Locked
  • Ready
  • waiting_to_unlock (Sorry for the spelling - but this comes from upstream!)
  • Error getting status (in case the mqtt proxy cannot connect to API)

• Actions supported

wallbox/<chargerId>/command lock
wallbox/<chargerId>/command unlock
wallbox/<chargerId>/command start
wallbox/<chargerId>/command pause
wallbox/<chargerId>/command maxCurrent <current>

Note: It seems as if it can take up to a minute (!) for the charger to change status, i.e. pause/start charging!

Configuration

Update config/config.json (see template file) to add Wallbox account info as well as MQTT broker information.

{
  "wallbox":{
    "username": "[email protected]",
    "password": "MyPassword",
    "pollInterval": "30"
  },
  "mqtt":{
    "host": "192.168.2.25",
    "port": 1883,
    "username": "[email protected]",
    "password": "MqttPassword",
    "rootTopic": "wallbox/",
  }
}

• pollInterval in seconds.
• rootTopic Topic prefix. For example, "wallbox" would emit "wallbox/2133132/status".

Getting Started

npm install
npm start

Next time it can be started directly using

node dist/client.js

Systemd autostart

/etc/systemd/system/wallboxMqtt.service

[Unit]
Description=Wallbox MQTT Brigde
Wants=network.target
After=network.target

[Service]
Type=simple
User=pi
Group=dialout
WorkingDirectory=/home/pi/wallbox-mqtt
ExecStart=/usr/local/bin/node dist/client.js
StandardOutput=null
Restart=always

[Install]
WantedBy=multi-user.target

systemctl daemon-reload

Manual start / stop via

service wallboxMqtt start

Enable auto start on system boot:

systemctl enable wallboxMqtt