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-gpio sudo 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=utf8 import httplib, urllib from w1thermsensor import W1ThermSensor import time import socket, serial, time import httplib import json HOST = "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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