怎么用树莓派搭建传感器物联网应用

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1. 挂载DS18B20

sudo modprobe w1-gpiosudo modprobe w1-therm

2. 安装Python的库单总线温度计访问库: w1thermsensor

pip install w1thermsensor

3. 新建一个iot.py文件敲入以下代码

#!/usr/bin/env python#coding=utf8import httplib, urllibfrom w1thermsensor import W1ThermSensorimport timeimport socket, serial, timeimport httplibimport jsonHOST = "open.lewei50.com"PORT = 80 user_key = '乐为物联的userkey'def send_data_to_yeelink(temp):                httpClient = None                try:                        params = json.dumps({'value': temp})                        headers = {"Content-type": "application/json"                    , "Accept": "text/plain",'U-ApiKey': 'Yeelink的api key'}                         print params                        httpClient = httplib.HTTPConnection('api.yeelink.net', 80, timeout=30)                        httpClient.request("POST", "/v1.1/device/设备id/sensor/传感器id/datapoints", params, headers)                         response = httpClient.getresponse()                        print response.status                        print response.reason                        print response.read()                        print response.getheaders() #获取头信息                except Exception, e:                        print e                finally:                        if httpClient:                                httpClient.close() def send_data(temp):                httpClient = None                try:                        params = json.dumps([{'Name': '传感器名称', 'Value': temp}])                        headers = {"Content-type": "application/x-www-form-urlencoded"                    , "Accept": "text/plain","userkey":user_key}                         print params                        httpClient = httplib.HTTPConnection(HOST, 80, timeout=30)                        httpClient.request("POST", "/api/V1/Gateway/UpdateSensors/01", params, headers)                         response = httpClient.getresponse()                        print response.status                        print response.reason                        print response.read()                        print response.getheaders() #获取头信息                except Exception, e:                        print e                finally:                        if httpClient:                                httpClient.close()while True:        for sensor in W1ThermSensor.get_available_sensors([W1ThermSensor.THERM_SENSOR_DS18B20]):                temp=sensor.get_temperature()                print("Sensor %s has temperature %.2f" % (sensor.id,temp ))                send_data(temp)                send_data_to_yeelink(temp)        time.sleep(120)

4. 运行python脚本

python iot.py

5. 如果温度读取成功且上传成功会打印相关消息.

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