added gps.py

This commit is contained in:
Adolfo Delorenzo 2024-07-05 09:12:43 -06:00
parent 5b1adee3ad
commit af4c79a19f

98
gps.py Normal file
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#!/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()
power_key = 6
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 is not ready')
return 0
def get_gps_position():
rec_null = True
answer = 0
print('Start GPS session...')
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)
if 1 == answer:
answer = 0
if ',,,,,,' in rec_buff:
print('GPS is not ready')
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()