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How do I add my monitor to Home Assistant

Asked by plantsense on 26 July 2026 Answered

On the monitor page, open Advanced settings and enter your Home Assistant MQTT broker address, and the username and password. Save, and the monitor connects and announces itself. It then appears in Home Assistant automatically, with its moisture, status and needs watering entities, no configuration files needed.

2 answers

    1. The MQTT broker address is the address of the machine running your MQTT broker, not the PlantSense monitor. For most people that is Home Assistant itself, running the Mosquitto add-on, so the broker address is simply your Home Assistant’s local IP.

      To find it:

      If you use the Mosquitto add-on in Home Assistant, the broker address is your Home Assistant IP address. You can find that in Home Assistant under Settings, then System, then Network, or on your router’s list of connected devices. It usually looks like 192.168.1.x.

      Enter that IP as the broker address on the monitor’s Home Assistant section, leave the port at 1883, and use the MQTT username and password you set when you installed Mosquitto (these are the MQTT credentials, not your Home Assistant login).

      If your broker runs on a separate machine, use that machine’s IP address instead.

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