added command_rx for sstv for camera present

rpitx.py

@@ -201,6 +201,7 @@ if __name__ == "__main__":
 						print("Ready for next packet!")
 						
 					sleep(0.5)
+				except:
 					if GPIO.input(squelch) == False:
 						print("carrier received!")
 						command_tx = not command_tx
@@ -214,7 +215,6 @@ if __name__ == "__main__":
 						else:
 							print("Turning off transmit")
 							system("echo > command_tx False")
-				except:		  
 					sleep(0.5)
 		elif (mode == 'm'):
 			print("CW")
@@ -293,7 +293,9 @@ if __name__ == "__main__":
 					file = open("/home/pi/CubeSatSim/sstv_image_2_320_x_256.jpg")
 					print("First SSTV stored image detected")
 					system("/home/pi/PiSSTVpp/pisstvpp -r 48000 -p s2 /home/pi/CubeSatSim/sstv_image_2_320_x_256.jpg") 
+					if (command_tx == True):
 						print ("Sending SSTV image")
+						if (command_tx == True):
 						output(txLed, txLedOn)
 						output(pd, 1)
 						output (ptt, 0)
@@ -317,6 +319,8 @@ if __name__ == "__main__":
 					print("Photo taken")
 					system("/home/pi/PiSSTVpp/pisstvpp -r 48000 -p s2 /home/pi/CubeSatSim/camera_out.jpg") 
 					system("sudo rm /home/pi/CubeSatSim/camera_out.jpg > /dev/null 2>&1") 
+
+					if (command_tx == True):
 						print ("Sending SSTV image")
 						output(txLed, txLedOn)
 						output(pd, 1)
@@ -332,6 +336,21 @@ if __name__ == "__main__":
 
 						output(txLed, txLedOff)
 						output (ptt, 1)
+
+					if GPIO.input(squelch) == False:
+						print("carrier received!")
+						command_tx = not command_tx
+						print(command_tx)
+						if (command_tx == True):
+							print("Turning on transmit")
+							system("echo > command_tx True")
+#							output(txLed, txLedOn)
+#							sleep(0.5)
+#							output(txLed, txLedff)
+						else:
+							print("Turning off transmit")
+							system("echo > command_tx False")
+					
 					output(pd, 0)
 					system("sudo rm /home/pi/CubeSatSim/camera_out.jpg.wav > /dev/null 2>&1") 
 					sleep(1)