====  Basic Configuration (PTT and Squelch) ====
File ''/etc/rc.local''
Edit the file with the command (add at the end of the file, just BEFORE ''exit 0'')
<code bash>
sudo nano /etc/rc.local
</code>

<code bash> 
#CONFIGURATION PORT PTT & SQL

# Radio "VHF" GPIO 16:PTT - GPIO 19:SQUELCH
echo "16" > /sys/class/gpio/export &
sleep 2
echo out > /sys/class/gpio/gpio16/direction

echo "19" > /sys/class/gpio/export &
sleep 2
echo in > /sys/class/gpio/gpio19/direction
sleep 2
echo 1 >  /sys/class/gpio/gpio19/active_low  
# MODE A : Squelch is active when the signal from receiver come from 0V to +5V (or 0V => +x V) / Upper config 'active_low' line is NOT in the script (line commented with # at its begin)
# MODE B : Squelch is active when the signal from receiver come from +5V to 0V (or +xV => 0V ) / Upper config 'active_low' line is in the script (uncommented)
 

# Radio "LINK" GPIO 17:PTT - GPIO 18:SQUELCH
echo "17" > /sys/class/gpio/export &
sleep 2
echo out > /sys/class/gpio/gpio17/direction

echo "18" > /sys/class/gpio/export &
sleep 2
echo in > /sys/class/gpio/gpio18/direction
sleep 2
echo 1 >  /sys/class/gpio/gpio18/active_low
# MODE A : Squelch is active when the signal from receiver come from 0V to +5V (or 0V => +x V) / Upper config 'active_low' line is NOT in the script (line commented with # at its begin)
# MODE B : Squelch is active when the signal from receiver come from +5V to 0V (or +xV => 0V ) / Upper config 'active_low' line is in the script (uncommented)
 </code>

It is possible to test the configuration that way [http://wiringpi.com/ wiringPi].

The result must be conform with (instruction ''gpio readall''):


{{ :documents:gpio_states_svxcard.png?nolink |800px|Les états des ports GPIO pour la ''SVXLink Card''}}