add command_tx to aprs

rpitx.py

@@ -176,6 +176,7 @@ if __name__ == "__main__":
 						print("Packet ready!")
 					system("gen_packets -o /home/pi/CubeSatSim/telem.wav /home/pi/CubeSatSim/t.txt -r 48000 > /dev/null 2>&1")
 					system("cat /home/pi/CubeSatSim/t.txt")
+					if (command_tx == True):
 						output(txLed, txLedOn)
 #						output(pd, 1)
 						output (ptt, 0)
@@ -197,7 +198,19 @@ if __name__ == "__main__":
 					system("sudo rm /home/pi/CubeSatSim/ready")
 					if (debug_mode == 1):
 						print("Ready for next packet!")
+						
 					sleep(0.5)
+					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")
+						else:
+						if (command_tx == True):
+							print("Turning off transmit")
+							system("echo > command_tx False")
 				except:		  
 					sleep(0.5)
 		elif (mode == 'm'):