From ba5e62dc96029f1e06d712d8900fefe09169777f Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Sat, 15 May 2021 15:44:26 -0400
Subject: [PATCH] added camera conditional for sstv

---
 rpitx.py | 42 +++++++++++++++++++++++++++++-------------
 1 file changed, 29 insertions(+), 13 deletions(-)

diff --git a/rpitx.py b/rpitx.py
index fee5501a..70ba8a2f 100644
--- a/rpitx.py
+++ b/rpitx.py
@@ -8,6 +8,16 @@ import sys
 from picamera import PiCamera
 from os import system
 
+try: 
+	camera = PiCamera()
+	print("Camera present")
+	camera_present = 1
+except:
+	print("No camera")
+	camera_present = 0
+finally:
+	print("Continuing")
+
 GPIO.setmode(GPIO.BCM)
 GPIO.setwarnings(False)
 GPIO.setup(22, GPIO.IN, pull_up_down=GPIO.PUD_UP)
@@ -71,19 +81,25 @@ if __name__ == "__main__":
 	    while 1:
 	    	system("(while true; do (sleep 5 && cat /home/pi/CubeSatSim/wav/sstv.wav); done) | csdr convert_i16_f | csdr gain_ff 7000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f 434.9e3 &")
 		GPIO.output(txLed, txLedOff)
-		system("raspistill -o /home/pi/camera_out.jpg -w 640 -h 496") #  > /dev/null 2>&1")
-		print("Photo taken")
-		GPIO.output(txLed, txLedOn)
-		system("sudo python3 -m pysstv --mode PD120 /home/pi/camera_out.jpg /home/pi/sstv_camera.wav") #  > /dev/null 2>&1")
-		GPIO.output(txLed, txLedOff)
-		print ("Sending SSTV photo")
-		time.sleep(1)
-		system("sudo killall -9 rpitx > /dev/null 2>&1")
-		system("sudo killall -9 csdr > /dev/null 2>&1")
-		system("sudo killall -9 cat > /dev/null 2>&1")
-		GPIO.output(txLed, txLedOn);		
-		system("cat /home/pi/sstv_camera.wav | csdr convert_i16_f | csdr gain_ff 7000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f 434.9e3") #  > /dev/null 2>&1")
-		
+		if (camera_present == 1):
+			system("raspistill -o /home/pi/camera_out.jpg -w 640 -h 496") #  > /dev/null 2>&1")
+			print("Photo taken")
+			GPIO.output(txLed, txLedOn)
+			system("sudo python3 -m pysstv --mode PD120 /home/pi/camera_out.jpg /home/pi/sstv_camera.wav") #  > /dev/null 2>&1")
+			GPIO.output(txLed, txLedOff)
+			print ("Sending SSTV photo")
+			time.sleep(1)
+			system("sudo killall -9 rpitx > /dev/null 2>&1")
+			system("sudo killall -9 csdr > /dev/null 2>&1")
+			system("sudo killall -9 cat > /dev/null 2>&1")
+			GPIO.output(txLed, txLedOn);		
+			system("cat /home/pi/sstv_camera.wav | csdr convert_i16_f | csdr gain_ff 7000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f 434.9e3") #  > /dev/null 2>&1")
+		else:
+			while 1:
+				GPIO.output(txLed, txLedOn)
+				time.sleep(60)
+				GPIO.output(txLed, txLedOff)
+				time.sleep(1)
 #		try:
 #			camera = PiCamera()
 #			camera.resolution = (640, 496)