Working with discrete outputs in Linux
The discrete output can be in one of two states:
Status |
Description |
|---|---|
0 |
Output off (relay off) |
1 |
Output on (relay on) |
Initialization:
Note
By default in Armbian Linux the GPIO pins are configured to sysfs mode at system boot and no additional configuration is required.
cd /sys/class/gpio
echo 456 > export
echo out > gpio456/direction
If you want to invert the output logic:
echo 1 > gpio456/active_low
Enable output:
echo 1 > gpio456/value
Output shutdown:
echo 0 > gpio456/value