add automatic camera change

poll_button.sh

@@ -30,21 +30,23 @@ gpiopin_led_r="2"		### var
 gpiopin_led_g="29"		### var
 
 
-playerproc="vlc"		### var
 cameracmd="/home/pi/birdcam/view_birdcam.sh"	### var
 
-buttonpolling="0.05"		### var
-buttontimeout="1"		### var
+buttonpolling="0.05"		### var: seconds
+buttontimeout="1"		### var: seconds
+countermax="1200"		### var: countermax=time/buttonpolling
 
 $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 $gpiopin_sw) -eq 1 ]; do
-#		echo "..."
+	while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
+		counter="$(($counter + 1))"
+		#echo "$counter"
 		sleep $buttonpolling
 	done
 
@@ -55,10 +57,12 @@ while true; do
 	echo "$camname started!"
 	sleep $buttontimeout
 
+	counter="0"
 	$gpiocmd mode $gpiopin_led_r out
 	$gpiocmd write $gpiopin_led_g 1
-	while [ $($gpiocmd read $gpiopin_sw) -eq 1 ]; do
-#		echo "..."
+	while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
+		counter="$(($counter + 1))"
+		#echo "$counter"
 		sleep $buttonpolling
 	done
 	
@@ -69,4 +73,4 @@ while true; do
 	echo "$camname started!"
 	sleep $buttontimeout
 
-done
+done