get
http://{deviceHost}/text_sensor/Device%20ID
Returns the unique device identifier, which is the device's MAC address expressed as a
12-character hexadecimal string (e.g., a1b2c3d4e5f6).
v2 → v3 URL change:
- v2 (ESPHome < 2026.7):
/text_sensor/device_id - v3 (ESPHome ≥ 2026.7):
/text_sensor/Device%20ID
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