Template:Networking trb141 manual input output status

ioman.acl.acl0
ioman.adc.adc0
ioman.dwi.dwi0
ioman.dwi.dwi1
ioman.gpio.dio0
ioman.gpio.dio1
ioman.gpio.iio
ioman.gpio.onewire
ioman.relay.relay0
ioman.relay.relay1

In order to read value use status command.

ubus call ioman.gpio.dio0 status
ubus call ioman.relay.relay0 status

To change input settings use update command and write the value.

ubus call ioman.gpio.dio0 update '{"value":"0"}'
ubus call ioman.gpio.dio0 update '{"value":"1"}'

To change relay settings use update command and write state.

ubus call ioman.relay.relay0 update '{"state":"open"}'
ubus call ioman.relay.relay0 update '{"state":"closed"}'

Reading I/O values from directory

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You can also collect I/O values straight from directories in your device.

Digital inputs, Relay outputs

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The following is a list of I/O directories in /sys/class/gpio/:

dwi1(dry wet) input 14; toggle 12 (to read value refer to gpio14, to change state dry/wet refer to gpio12)
dwi2(dry wet) input 15; toggle 38 (to read value refer to gpio15, to change state dry/wet refer to gpio38)
relay open 20; closed 22; (turn off gpio20 set to 0, turn on gpio22 set value to 1; and visa versa)
latching relay open 23; close 21 (turn off gpio23 set to 0, turn on gpio21 set value to 1; and visa versa)
dio0 (power socket) input 13; output 16 (direction can be changed, to read input use gpio13, to control output use gpio16)
dio1 (power socket) input 17; output 78 (direction can be changed, to read input use gpio17, to control output use gpio78)
iio (isolated input) input 1021 (to read value refer to gpio1021)

In order to read digital input value use cat command.

cat /sys/class/gpio/gpio14/value
cat /sys/class/gpio/gpio15/value
cat /sys/class/gpio/gpio1021/value

To change input state use echo command where "1" is "dry" state and "0" is "wet" state.

echo 0 > /sys/class/gpio/gpio12/value
echo 1 > /sys/class/gpio/gpio38/value

When one Relay output is open, the other one is closed, so turning on/off the output you will have to change value on both pins. For that echo command is used. Same principle applies to Latching Relay output.

echo 1 > /sys/class/gpio/gpio20/value & echo 0 > /sys/class/gpio/gpio22/value
echo 1 > /sys/class/gpio/gpio23/value & echo 0 > /sys/class/gpio/gpio21/value

ADC (Analog Input)

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ADC (Analog input) can be read from different directory, /sys/devices/qpnp-vadc-8/mpp4_vadc also using cat command, but received Result value has to be divided by 126582 to get number in volts.

cat /sys/devices/qpnp-vadc-8/mpp4_vadc 

One-wire

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To read one-wire sensor data you will need to follow these steps:

Set one-wire sensor value to 1 using ubus command.

 ubus call ioman.gpio.onewire update '{"value":"1"}'

After that list out connected one-wire devices in directory /sys/bus/w1/devices with ls command.

 ls /sys/bus/w1/devices

Choose sensor that you want to know values off and using cat command read them from /sys/bus/w1/devices/<device_name>/w1_slave directory.

 cat /sys/bus/w1/devices/<device_name>/w1_slave