Cartft FLEETPC-ARM-300 Reference Manual page 41

3.16 LED
There are 4x LEDs at the FLEETPC-ARM-300 front panel:
 When DC power is applied, PWR LED is on
 3G LED mode is in below table:
Mode Operating Status
1 No service/Restricted
service
2 Register to the network
3 Dial-up successfully
When FLEETPC-ARM-300 is connected to 3G/LTE network, the
LED is ON. In searching 3G/LTE network, the LED keeps
blinking.
 LED1, LED2 are connected to below iMX6 pads directly and can be turned on/off by
software.
LED name
LED1
LED2
// Linux commands to turn on/off LED1 or LED2:
# echo 1 > /sys/class/leds/led1/brightness
# echo 0 > /sys/class/leds/led1/brightness
# echo 1 > /sys/class/leds/led2/brightness
# echo 0 > /sys/class/leds/led2/brightness
ON(0.1s) - OFF(0.1s) - ON(0.1s) - OFF(1.7s)
2-second cycle
ON(0.1s) - OFF (1.9s)
2-second cycle
ON
iMX6 Ball iMX6 Pad Name
R7
W5 KEY_COL0
FLEETPC-ARM-300 Series
LED2 3G
LED1 PWR
LED ON/OFF
GPIO_3
// led1 off
// led1 on
// led2 off
// led2 on
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iMX6 Signal
GPIO1_IO03
GPIO4_IO06