树莓派温湿度发布到百度云MQTT

树莓派温湿度发布到百度云MQTT:

继上一篇文章( 树莓派与DHT-11温湿度传感器):修改Collect.py(collect函数返回温湿度信息) 如下:
Collect.py:

import RPi.GPIO as GPIO
import time
def collect():
    THdata = []
    channel = 4
    data = []
    GPIO.setmode(GPIO.BCM)
    time.sleep(2)
    GPIO.setup(channel, GPIO.OUT)
    GPIO.output(channel, GPIO.LOW)
    time.sleep(0.02)
    GPIO.output(channel, GPIO.HIGH)
    GPIO.setup(channel, GPIO.IN)
    while GPIO.input(channel) == GPIO.LOW:
        continue
    while GPIO.input(channel) == GPIO.HIGH:
        continue
    j = 0
    while j < 40:
        k = 0
        while GPIO.input(channel) == GPIO.LOW:
            continue
        while GPIO.input(channel) == GPIO.HIGH:
            k += 1
            if k > 100:
                break
        if k < 8:
            data.append(0)
        else:
            data.append(1)

        j += 1

    # print("sensor is working.")
    # print(data)
    humidity_bit = data[0:8]
    humidity_point_bit = data[8:16]
    temperature_bit = data[16:24]
    temperature_point_bit = data[24:32]
    check_bit = data[32:40]
    humidity = 0
    humidity_point = 0
    temperature = 0
    temperature_point = 0
    check = 0
    for i in range(8):
        humidity += humidity_bit[i] * 2 ** (7 - i)
        humidity_point += humidity_point_bit[i] * 2 ** (7 - i)
        temperature += temperature_bit[i] * 2 ** (7 - i)
        temperature_point += temperature_point_bit[i] * 2 ** (7 - i)
        check += check_bit[i] * 2 ** (7 - i)
    tmp = humidity + humidity_point + temperature + temperature_point
    if check == tmp:
        print("temperature :", temperature, "*C", " humidity :", humidity, "%")
        THdata.append(temperature)
        THdata.append(humidity)
        return THdata
    else:
        # print("wrong")
        time.sleep(1)
        return collect()

Publish.py:(change,topic为修改的部分,改成你自己的百度云MQTT实例即可)

import paho.mqtt.client as mqtt
import sys
import uuid
import Collect
import time

broker = change0'
port = 1883
username = 'change1'# 修改
password = 'change2'# 修改
clientid = 'temperature_publish' + str(uuid.uuid4())
topic = 'temperature'# 修改


def on_connect(client, userdata, rc):
    print('Connected. Client id is: ' + clientid)

def on_message(client, userdata, msg):
    msg = str(msg.payload, 'utf-8')
    print('MQTT message received: ' + msg)
    if msg == 'exit':
        sys.exit()

client = mqtt.Client(clientid)
# client.will_set('temperature', 'last will', 0, False)
client.on_connect = on_connect
client.on_message = on_message
client.username_pw_set(username, password)
print('Connecting to broker: ' + broker)
client.connect(broker, port)
client.loop_start()
time.sleep(3)
# client.loop_forever()
while True:
    rTHdata = test1.Collect.collect()
    client.publish(topic, "temperture :" + str(rTHdata[0]) + " *C   " + "humidity :" + str(rTHdata[1]) + " %")
    #设置发布间隔时间
    time.sleep(3)