LEDS
Pigeon RB700 Standard 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 (built into the POWER button) is under hardware control and indicates the state of UPS (see tab. 1). The PWR LED is controlled by a microcontroller, which monitors the value of the supply voltage and UPS state.
Table 1. The PWR LED states
| PWR LED | UPS STATE | OS STATE |
|---|---|---|
| 250 ms off, 250 ms on | UPS charging | Not running |
| Turned on | Power on | Running |
| 250 ms off, 100 ms on | Brownout detection | Running |
| 900 ms off, 100 ms on | Shutdown in progress | Running |
| Turned off | Power off | Not running |
USR and ACT LEDs can be controlled by the user.
LEDs built-in Ethernet sockets:
- Green - Ethernet status indicator. It blinks when network activity is detected,
- Yellow - Ethernet link indicator. It is always on when the Ethernet is connected.
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