128 lines
3.4 KiB
Python
128 lines
3.4 KiB
Python
#!/usr/bin/python
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# -*- coding:utf-8 -*-
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import RPi.GPIO as GPIO
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import paho.mqtt.client as mqtt
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import serial
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import time
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import os
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import csv
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from datetime import datetime
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# MQTT Broker settings
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mqttBroker = "65.108.199.212"
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myhost = os.uname()[1]
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client = mqtt.Client(myhost)
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ser = serial.Serial('/dev/ttyS0', 115200)
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ser.flushInput()
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rec_buff = ''
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time_count = 0
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# GPIO setup
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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gpio_initialized = False
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def setup_gpio(power_key):
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global gpio_initialized
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if not gpio_initialized:
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GPIO.setup(power_key, GPIO.OUT)
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gpio_initialized = True
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def send_at(command, back, timeout):
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rec_buff = ''
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ser.write((command+'\r\n').encode())
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time.sleep(timeout)
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if ser.inWaiting():
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time.sleep(0.01)
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rec_buff = ser.read(ser.inWaiting())
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if rec_buff != '':
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if back not in rec_buff.decode():
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print(command + ' ERROR')
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print(command + ' back:\t' + rec_buff.decode())
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return 0
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else:
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gps_data = rec_buff.decode()[13:-36]
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print(gps_data)
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client.publish("iiot/" + myhost + "/gps", gps_data)
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return gps_data
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else:
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print('GPS no está listo')
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return 0
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def parse_gps_data(gps_data):
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parts = gps_data.split(',')
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if len(parts) >= 4:
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lat = float(parts[0][:2]) + float(parts[0][2:]) / 60
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lon = float(parts[2][:3]) + float(parts[2][3:]) / 60
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if parts[1] == 'S':
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lat = -lat
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if parts[3] == 'W':
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lon = -lon
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return lat, lon
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return None, None
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def write_to_csv(lat, lon):
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timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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with open('gps_data.csv', 'a', newline='') as csvfile:
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writer = csv.writer(csvfile)
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writer.writerow([timestamp, lat, lon])
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def get_gps_position():
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rec_null = True
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print('Iniciando GPS')
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send_at('AT+CGPS=1,1', 'OK', 1)
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time.sleep(2)
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while rec_null:
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gps_data = send_at('AT+CGPSINFO', '+CGPSINFO: ', 1)
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if gps_data and gps_data != 0:
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if ',,,,,,' not in gps_data:
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lat, lon = parse_gps_data(gps_data)
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if lat is not None and lon is not None:
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write_to_csv(lat, lon)
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print(f"GPS data written to CSV: {lat}, {lon}")
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rec_null = False
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else:
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print('GPS no está listo')
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else:
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print('error')
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send_at('AT+CGPS=0', 'OK', 1)
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return False
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time.sleep(1.5)
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def power_on(power_key):
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print('SIM7600X is starting:')
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setup_gpio(power_key)
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time.sleep(0.1)
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GPIO.output(power_key, GPIO.HIGH)
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time.sleep(2)
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GPIO.output(power_key, GPIO.LOW)
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time.sleep(20)
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ser.flushInput()
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print('SIM7600X is ready')
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def power_down(power_key):
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if gpio_initialized:
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print('SIM7600X is loging off:')
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GPIO.output(power_key, GPIO.HIGH)
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time.sleep(3)
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GPIO.output(power_key, GPIO.LOW)
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time.sleep(18)
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print('Good bye')
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try:
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power_key = 6 # Replace with your actual power key GPIO pin number
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power_on(power_key)
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get_gps_position()
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power_down(power_key)
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except Exception as e:
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print(f"An error occurred: {e}")
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finally:
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if ser is not None:
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ser.close()
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if gpio_initialized:
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GPIO.cleanup()
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print("Script execution completed.")
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