Raspberry GPIO's Setup: Difference between revisions
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Revision as of 03:43, 31 December 2020
At this moment only PTT is working, COR is a work in progress
Lets consider we are going to use
GPIO 17 (Pin 11) for COR input
GPIO 27 (Pin 13) for PTT Output
Install wiringpi
sudo apt-get install git-core sudo git clone https://github.com/WiringPi/WiringPi.git /opt/wiringpi cd /opt/wiringpi sudo ./build
Create an initialization file
Create the following file using nano:
sudo nano /usr/local/sbin/Init-GPIO.sh
Add the following code to the file
#!/bin/bash #script name - Init_GPIO # COR Input gpio -g mode 17 in # makes gpio 17 pin 11 on Raspberry pi 2/3 as input gpio -g mode 17 up # activates pull-up # PTT pin (Output) gpio -g mode 27 out # makes gpio 27 pin 13 as output gpio -g write 27 0 # Default to 0/Off
After making your changes type <CTRL> + <X> and then type <Y> followed by <Enter>. You will be back to the previous menu and choose <Back>.
Create the COR monitoring script
Create the following file using nano:
sudo nano /usr/local/sbin/COR-wfi.sh
#!/bin/bash gpio -g mode 17 in gpio -g mode 17 up while [ 1=1 ] do # wait int pin to go low gpio -g wfi 17 both COR=$(gpio -g read 17) if [ "$COR" = "0" ]; then gpio -g write 27 1 echo COR GPIO low/closed else gpio -g write 27 0 echo COR GPIO high/open fi done
After making your changes type <CTRL> + <X> and then type <Y> followed by <Enter>. You will be back to the previous menu and choose <Back>.
Create Event files
now create the following file using nano:
sudo nano /usr/local/sbin/PTT-GPIO-high.sh
Add the following lines to the file, in this example I am using GPIO 27 which is assigned to pin 13 on a Raspberry Pi Model 2/3.
#!/bin/bash gpio -g write 27 1
After making your changes type <CTRL> + <X> and then type <Y> followed by <Enter>. You will be back to the previous menu and choose <Back>.
Next create the following file using nano:
sudo nano /usr/local/sbin/PTT-GPIO-low.sh
Add the following lines to the file, in this example I am using GPIO 27 which is assigned to pin 13 on a Raspberry Pi Model 2/3.
#!/bin/bash gpio -g write 27 0
After making your changes type <CTRL> + <X> and then type <Y> followed by <Enter>. You will be back to the previous menu and choose <Back>.
Make the Init-GPIO and COR-wfi.sh scripts run at startup
you have to add a line to the rc.local file.
sudo nano /etc/rc.local
Before the exit 0 line you have to add:
# For AllStarLink /usr/local/sbin/Init-GPIO.sh /usr/local/sbin/COR-wfi.sh
After making your changes type <CTRL> + <X> and then type <Y> followed by <Enter>. You will be back to the previous menu and choose <Back>.
Set permissions to execute scripts
cd /usr/local/sbin sudo chmod +x Init-GPIO.sh sudo chmod +x COR-wfi.sh sudo chmod +x PTT-GPIO-high.sh sudo chmod +x PTT-GPIO-low.sh
Test GPIO pins
You can test PTT output by manually setting High or Low the PTT pin.
High:
sudo /usr/local/sbin/PTT-GPIO-high.sh
Low:
sudo /usr/local/sbin/PTT-GPIO-low.sh
Edit rpt.conf file
Now use nano to edit your rpt.conf file:
sudo nano /etc/asterisk/rpt.conf
On your node number stanza, i.e. [12345] add the following line:
events=events12345;
Then at the end of the file add the following stanza:
[events12345] sudo /usr/local/sbin/PTT-GPIO-high.sh = S|T|RPT_TXKEYED; sudo /usr/local/sbin/PTT-GPIO-low.sh = S|F|RPT_TXKEYED;
After making your changes type <CTRL> + <X> and then type <Y> followed by <Enter>. You will be back to the previous menu and choose <Back>.