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LEDS

Pigeon RB700 Essence has seven LEDs (including four built-in Ethernet sockets). Three of them are visible through the front panel:

  • PWR (green),
  • ACT (red),
  • USR (yellow).

The PWR LED is under hardware control and indicates the presence of the correct supply voltage. The PWR LED is controlled by the circuit, which monitors the value of the supply voltage.

USR and ACT LEDs can be controlled by the user.

LEDs built-in Ethernet sockets:

  • green - LINK - LED is on when a valid link is detected. LED blinks when transmit or receive activity is detected.

  • yellow - SPEED - LED is on when the Ethernet operating speed is 100Mbs, or during auto-negotiation. The LED is off during 10 Mbps operation or when the line is isolated.

Bash Configuration and LED Control

The default trigger for the ACT LED is 'heartbeat':

$ cat /sys/class/leds/ACT/trigger

none rc-feedback kbd-scrolllock kbd-numlock kbd-capslock kbd-kanalock kbd-shiftlock kbd-altgrlock kbd-ctrllock kbd-altlock kbd-shiftllock kbd-shiftrlock kbd-ctrlllock kbd-ctrlrlock timer oneshot [heartbeat] backlight gpio cpu cpu0 cpu1 cpu2 cpu3 default-on input panic actpwr mmc1 mmc0 rfkill-any rfkill-none

You can change the trigger:

$ echo mmc0 | sudo tee /sys/class/leds/ACT/trigger

or deactivate the trigger:

$ echo none | sudo tee /sys/class/leds/ACT/trigger

The LED can be turned on and off using the 'brightness' file:

$ echo '0' | sudo tee /sys/class/leds/ACT/brightness  # ACT LED turn off 
$ echo '1' | sudo tee /sys/class/leds/ACT/brightness  # ACT LED turn on 
$ echo '0' | sudo tee /sys/class/leds/USR/brightness  # USR LED turn off 
$ echo '1' | sudo tee /sys/class/leds/USR/brightness  # USR LED turn on