ESPHome firmware version

Returns the ESPHome framework version the firmware was compiled with.
This is useful for determining which URL format the device expects
(see the version compatibility table in the API overview above).

v2 → v3 URL change:

  • v2 (ESPHome < 2026.7): /text_sensor/esphome_version
  • v3 (ESPHome ≥ 2026.7): /text_sensor/ESPHome%20Version
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