LED Status Indicators¶

The onboard LED provides visual feedback on the device's status:

Color	Meaning
	Initializing on boot
	Connecting to Wi-Fi or in setup mode
	USB Mass Storage (MSC) mode active
	FTP mode active
	MQTT connected

LED Brightness¶

You can adjust the brightness of the status LED in two ways:

• Via Web API (Recommended):

  • Send a POST request to /led/brightness with a plain text integer between 0 and 255 in the request body.
  • This setting is saved to the device's configuration and will persist across reboots.

• Via Firmware Build Flags:

  1. Open platformio.ini: Open the platformio.ini file in the root of the project.
  2. Find LED_BRIGHTNESS: Locate the build_flags section and find the -D LED_BRIGHTNESS line. If it doesn't exist, you can add it.
  3. Change the Value: Set the value to a number between 0 (off) and 255 (maximum brightness).
  4. Rebuild and Upload: Save the file, then rebuild and upload the firmware for the change to take effect.

[env]
...
build_flags =
  ...
  -D LED_BRIGHTNESS=15

References¶