#!/usr/bin/python # -*- coding:utf-8 -*- import RPi.GPIO as GPIO import paho.mqtt.client as mqtt import serial import time, os # MQTT Broker settings mqttBroker ="65.108.199.212" myhost = os.uname()[1] client = mqtt.Client(myhost) client.connect(mqttBroker, 1883) ser = serial.Serial('/dev/ttyS0',115200) ser.flushInput() rec_buff = '' rec_buff2 = '' time_count = 0 def send_at(command,back,timeout): rec_buff = '' ser.write((command+'\r\n').encode()) time.sleep(timeout) if ser.inWaiting(): time.sleep(0.01 ) rec_buff = ser.read(ser.inWaiting()) if rec_buff != '': if back not in rec_buff.decode(): print(command + ' ERROR') print(command + ' back:\t' + rec_buff.decode()) return 0 else: print(rec_buff.decode()) return 1 else: print('GPS no está listo') return 0 def get_gps_position(): rec_null = True answer = 0 print('Iniciando GPS') rec_buff = '' send_at('AT+CGPS=1,1','OK',1) time.sleep(2) while rec_null: answer = send_at('AT+CGPSINFO','+CGPSINFO: ',1) client.publish("iiot/"+ myhost +"/gps", answer, 0) if 1 == answer: answer = 0 if ',,,,,,' in rec_buff: print('GPS no está listo') rec_null = False time.sleep(1) else: print('error %d'%answer) rec_buff = '' send_at('AT+CGPS=0','OK',1) return False time.sleep(1.5) def power_on(power_key): print('SIM7600X is starting:') GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) GPIO.setup(power_key,GPIO.OUT) time.sleep(0.1) GPIO.output(power_key,GPIO.HIGH) time.sleep(2) GPIO.output(power_key,GPIO.LOW) time.sleep(20) ser.flushInput() print('SIM7600X is ready') def power_down(power_key): print('SIM7600X is loging off:') GPIO.output(power_key,GPIO.HIGH) time.sleep(3) GPIO.output(power_key,GPIO.LOW) time.sleep(18) print('Good bye') try: #power_on(power_key) get_gps_position() #power_down(power_key) except: if ser != None: ser.close() #power_down(power_key) GPIO.cleanup() if ser != None: ser.close() GPIO.cleanup()