Got a simple ESPHome yaml that works with HA

xiao-esp32c3-light-sensor.yaml

@@ -0,0 +1,45 @@
+esphome:
+  name: xiao-esp32c3-light-sensor
+  friendly_name: XIAO ESP32C3 Light Sensor
+  platformio_options:
+    board_build.f_flash: 40000000L
+    board_build.flash_mode: dio
+    board_build.flash_size: 4MB
+
+esp32:
+  variant: ESP32C3
+  board: esp32-c3-devkitm-1
+  framework:
+    type: esp-idf
+
+logger:
+
+api:
+  encryption:
+    key: "IMbpaUOgYJWv7CbCDwNjkhPQYdDylPqulrXvHS5BOKg="
+
+ota:
+  - platform: esphome
+    password: "68124e613de22b373413d37452777c49"
+
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+
+  # Enable fallback hotspot (captive portal) in case wifi connection fails
+  ap:
+    ssid: "Xiao-Esp32C3-Light-Sensor"
+    password: "nNaTBzEaDn5g"
+
+captive_portal:
+
+i2c:
+  sda: GPIO6
+  scl: GPIO7
+  scan: true
+    
+sensor:
+  - platform: bh1750
+    name: "Lichtsterkte Lux"
+    address: 0x23
+    update_interval: 5s