birdcam-pi/poll_button.sh

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#!/bin/sh
vars="/home/pi/birdcam/vars"
gpiocmd="$(command -v gpio)"
if [ -z "$gpiocmd" ]; then
echo "Command gpio missing, try to install ..."
echo "Check internet connection ..."
pingserver="$(cat $vars | grep pingserver | cut -d'=' -f2)"
if ! ping -q -c1 $pingserver>/dev/null; then
echo "No internet connection ..."
exit 0
fi
wget https://project-downloads.drogon.net/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
rm wiringpi-latest.deb
# sudo apt update; sudo apt -y install wiringpi
gpiocmd="$(command -v gpio)"
if [ -z "$gpiocmd" ]; then
echo "cannot install wiringpi, exiting ..."
exit 0
fi
fi
gpiopin_sw="$(cat $vars | grep gpio_sw | cut -d'=' -f2)"
gpiopin_led_r="$(cat $vars | grep gpio_led_r | cut -d'=' -f2)"
gpiopin_led_g="$(cat $vars | grep gpio_led_g | cut -d'=' -f2)"
cameracmd="$(cat $vars | grep camerash | cut -d'=' -f2)"
buttonpolling="$(cat $vars | grep buttonpolling | cut -d'=' -f2)"
buttontimeout="$(cat $vars | grep buttontimeout | cut -d'=' -f2)"
countermax="$(cat $vars | grep countermax | cut -d'=' -f2)"
$gpiocmd mode $gpiopin_led_g out
$gpiocmd write $gpiopin_led_g 0
while true; do
counter="0"
$gpiocmd mode $gpiopin_led_r out
$gpiocmd write $gpiopin_led_g 1
while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
counter="$((counter + 1))"
#echo "$counter"
sleep $buttonpolling
done
$gpiocmd write $gpiopin_led_g 0
$gpiocmd mode $gpiopin_led_r in
camname="$(cat $vars | grep camparamr | cut -d'=' -f2)"
$cameracmd $camname &
echo "$camname started!"
sleep $buttontimeout
counter="0"
$gpiocmd mode $gpiopin_led_r out
$gpiocmd write $gpiopin_led_g 1
while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
counter="$((counter + 1))"
#echo "$counter"
sleep $buttonpolling
done
$gpiocmd write $gpiopin_led_g 0
$gpiocmd mode $gpiopin_led_r in
camname="$(cat $vars | grep camparam1 | cut -d'=' -f2)"
$cameracmd $camname &
echo "$camname started!"
sleep $buttontimeout
counter="0"
$gpiocmd mode $gpiopin_led_r out
$gpiocmd write $gpiopin_led_g 1
while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
counter="$((counter + 1))"
#echo "$counter"
sleep $buttonpolling
done
$gpiocmd write $gpiopin_led_g 0
$gpiocmd mode $gpiopin_led_r in
camname="$(cat $vars | grep camparam2 | cut -d'=' -f2)"
$cameracmd $camname &
echo "$camname started!"
sleep $buttontimeout
done