Companion

ESPresense Companion is also bidirectional on MQTT.

Companion Reads

Companion subscribes to data coming from ESPresense nodes:

• espresense/devices/+ for BLE observations from nodes
• espresense/rooms/+/telemetry for node telemetry
• espresense/rooms/+/status for node availability

Companion Writes

Companion publishes processed outputs and configuration changes:

• Presence and location outputs for Home Assistant entities
• Node optimization and configuration updates through room .../set topics, such as max distance tuning

For the node topic reference and write examples, see MQTT Overview.