Send mesh data to Home Assistant

AdvancedMeshtasticAbout 1 hour

You'll need

Home Assistant with an MQTT broker
An ESP32 Meshtastic gateway (JSON isn't supported on nRF52)
Basic YAML editing

1. Set up the gateway

Follow Bridge your mesh with MQTT, pointing the gateway at your Home Assistant’s MQTT broker, and turn on JSON enabled.

2. Find your topics and node numbers

JSON messages arrive on topics like:

msh/US/2/json/<CHANNEL>/!<gateway-node-id>

Each message includes the sender’s node number in from. Find node numbers with MQTT Explorer or meshtastic --info.

3. Add sensors

Put MQTT sensors in a separate mqtt.yaml and include it from configuration.yaml:

mqtt: !include mqtt.yaml

# mqtt.yaml (replace the topic and node number with yours)
sensor:
  - name: "Ranch node battery"
    unique_id: ranch_node_battery
    state_topic: "msh/US/2/json/LongFast/!67ea9400"
    unit_of_measurement: "V"
    value_template: >-
      {% if value_json.from == 4038675309 and value_json.payload.voltage is defined %}
        {{ value_json.payload.voltage | round(2) }}
      {% else %}
        {{ this.state }}
      {% endif %}

The same pattern works for temperature, humidity, pressure, channel utilization and text messages; Meshtastic’s Home Assistant page has the full set.

4. Optional: send messages from Home Assistant

The docs show publishing to msh/US/2/json/mqtt/!<gateway-node-id> with a sendtext payload. That needs a channel named mqtt with downlink enabled on the gateway. Follow your local group’s rules before enabling downlink.

Sources

Checked on October 18, 2026.