127 lines
3.2 KiB
Python
Executable File
127 lines
3.2 KiB
Python
Executable File
#!/usr/bin/python
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# -*- coding:utf-8 -*-
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import RPi.GPIO as GPIO
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import serial
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import time, os
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import csv
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from datetime import datetime
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# GPIO configuration
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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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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myhost = os.uname()[1]
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# CSV file settings
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csv_filename = f"gps_data_{myhost}.csv"
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csv_headers = ["Timestamp", "Latitude", "Longitude"]
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def convert_to_decimal(coord_str):
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coord = coord_str[:-2]
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direction = coord_str[-1]
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degrees = float(coord[:2] if direction in ['N', 'S'] else coord[:3])
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minutes = float(coord[2:] if direction in ['N', 'S'] else coord[3:])
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decimal = degrees + (minutes / 60)
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if direction in ['S', 'W']:
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decimal = -decimal
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return decimal
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def parse_gps_data(gps_string):
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parts = gps_string.split(',')
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if len(parts) != 4:
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return "Invalid GPS data"
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lat = convert_to_decimal(parts[0] + ',' + parts[1])
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lon = convert_to_decimal(parts[2] + ',' + parts[3])
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return f"{lat:.6f}", f"{lon:.6f}"
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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(csv_filename, mode='a', newline='') as file:
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writer = csv.writer(file)
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writer.writerow(["Test Timestamp", 0.0, 0.0])
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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("Raw GPS data:", gps_data)
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lat, lon = parse_gps_data(gps_data)
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converted_gps = f"{lat}, {lon}"
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print("Converted GPS data for Google Maps:", converted_gps)
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current_time = datetime.datetime.now()
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write_to_csv(current_time, lat, lon)
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return 1
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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 get_gps_position():
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rec_null = True
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answer = 0
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print('Iniciando GPS')
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rec_buff = ''
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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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answer = send_at('AT+CGPSINFO','+CGPSINFO: ',1)
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client.publish("iiot/"+ myhost +"/gps", rec_buff, 0)
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if 1 == answer:
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answer = 0
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if ',,,,,,' in rec_buff:
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print('GPS no está listo')
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rec_null = False
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time.sleep(1)
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else:
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print('error %d'%answer)
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rec_buff = ''
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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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# Create CSV file with headers if it doesn't exist
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if not os.path.exists(csv_filename):
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with open(csv_filename, mode='w', newline='') as file:
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writer = csv.writer(file)
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writer.writerow([timestamp, lat, lon])
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writer.writerow(csv_headers)
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try:
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get_gps_position()
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except:
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if ser != None:
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ser.close()
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GPIO.cleanup()
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if ser != None:
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ser.close()
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GPIO.cleanup()
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