Wi-Fi signal strength (dBm)

GET http://{deviceHost}/sensor/WiFi%20Signal

Returns the Wi-Fi received signal strength indicator (RSSI) in dBm. More negative values
indicate a weaker signal (e.g., -50 dBm is strong, -85 dBm is weak).

v2 → v3 URL change:

• v2 (ESPHome < 2026.7): /sensor/wifi_signal_rssi (note: this label was inconsistent
  with the actual entity name "WiFi Signal"; both resolved to the same entity)
• v3 (ESPHome ≥ 2026.7): /sensor/WiFi%20Signal