#....
def main():
	#Initialize LoRa control ports (M0-M1, AUX)
        GPIO.setmode(GPIO.BOARD)
	GPIO.setwarnings(False)
	GPIO.setup(PIN_LORA_M0, GPIO.OUT)
	GPIO.setup(PIN_LORA_M1, GPIO.OUT)
	GPIO.setup(PIN_LORA_AUX, GPIO.IN, pull_up_down = GPIO.PUD_UP)	
	
	#Wait until AUX is high (Module is ready)
	if not wait_until_pin(PIN_LORA_AUX, GPIO.HIGH, 1.0):
		raise_error("LoRa module is busy!", -1, cleanup())
	else:
		print("LoRa module is available")
	
	#Set module mode (11) sleep
	GPIO.output(PIN_LORA_M0, GPIO.HIGH)
	GPIO.output(PIN_LORA_M1, GPIO.HIGH)
	if not wait_until_pin(PIN_LORA_AUX, GPIO.HIGH, 1.0):
		raise_error("Cannot set parameters", -1, cleanup())
	else:
		print("Parameters are set")
	
	#Send lora configuration parameters
	uart.reset_input_buffer()
	print("TX:", lora_params.hex(" "))
	uart.write(lora_params)
	uart.flush()
	time.sleep(0.1)
	
	#Validate lora configuration parameters
	uart.reset_input_buffer()
	print("TX:", cmd_params.hex(" "))
	uart.write(cmd_params)
	uart.flush()
	rx = uart.read(6)
	if rx != lora_params:
		raise_error("Unable to validate configuration parameters", -1, cleanup())
	else: 
		print("Config parameters:", rx.hex(" "))
		time.sleep(0.1)
	
	#Set module mode (00) transceiver
	if not wait_until_pin(PIN_LORA_AUX, GPIO.HIGH, 1.0):
		raise_error("LoRa module is busy!", -1, cleanup())
	else:
		print("LoRa module is available to transmit")
	GPIO.output(PIN_LORA_M0, GPIO.LOW)
	GPIO.output(PIN_LORA_M1, GPIO.LOW)
	time.sleep(0.01)	

	#....
        
main()

if _name_ == "__main__":
    main()