Raspberry pi 定时天气播报

操作步骤：

• 简单的写了python脚本
• 添加定时计划里执行

百度的天气接口:http://api.map.baidu.com/telematics/v3/weather?location=city&output=json&ak=api_key

百度的语音合成接口：http://tsn.baidu.com/text2audio?tex=text&lan=zh&cuid=cuid&ctp=1&tok=token

python脚本内容

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import os
import urllib.request
import sys
import json
import time

#get token
def get_token():
    api_key="your api key"
    sec_key="your secret key"
    auth_url="https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id="+api_key+"&client_secret="+sec_key

    res = urllib.request.urlopen(auth_url)
    #print(res.read())
    json_data = res.read().decode('utf-8')
    #print(json_data)

    result = json.loads(json_data)['access_token']
    return result


def get_weather(city):
    api_key="your api key"
    weather_url="http://api.map.baidu.com/telematics/v3/weather?location="+city+"&output=json&ak="+api_key

    res = urllib.request.urlopen(weather_url)
    json_data = res.read().decode('utf-8')
    #print(json_data)
    json_data = json.loads(json_data)
    #get json data
    #check result status
    status = json_data['status']
    isTom = time.localtime().tm_hour>18
    index = 1 if isTom else 0
    initStr = '明天' if isTom else '今天'
    if status=='success':
        results=json_data['results'][0]
        pm25=results['pm25']
        weather_data=results['weather_data']
        date=weather_data[index]['date']
        weather=weather_data[index]['weather']
        wind=weather_data[index]['wind']
        temperature=weather_data[index]['temperature'].replace('~','到')
        if not isTom:
            return'{}是{} PM2.5是{} 天气{} {} 温度为{}'.format(initStr,date,pm25,weather,wind,temperature)
        else:
            return'{}是{} 天气{} {} 温度为{}'.format(initStr,date,weather,wind,temperature)
    else:
        return ''


token=get_token()
weather=get_weather('beijing')

if os.path.exists('/home/pi/weather/weather.txt'):
    with open('/home/pi/weather/weather.txt','wt') as f:
        f.write(weather)
        f.close()
        print(weather)
else:
    print('weather.txt not exists')


#tts
url='http://tsn.baidu.com/text2audio?tex='+weather+'&lan=zh&cuid=raspberrypi2&ctp=1&tok='+token

#print(url)
try:
    os.system('/usr/bin/mplayer "%s"' %(url))
except Exception as e:
    print('Exception',e)

添加到crontab 定时计划里,每天早上7：10执行

10 7 * * * /usr/local/bin/python3.5 /home/pi/weather/weather.py

v附录：百度天气API返回的JSON数据

{
  "error": 0,
  "status": "success",
  "date": "2016-02-25",
  "results": [
    {
      "currentCity": "beijing",
      "pm25": "33",
      "index": [
        {
          "title": "穿衣",
          "zs": "较冷",
          "tipt": "穿衣指数",
          "des": "建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"
        },
        {
          "title": "洗车",
          "zs": "较适宜",
          "tipt": "洗车指数",
          "des": "较适宜洗车，未来一天无雨，风力较小，擦洗一新的汽车至少能保持一天。"
        },
        {
          "title": "旅游",
          "zs": "适宜",
          "tipt": "旅游指数",
          "des": "天气较好，同时又有微风伴您一路同行。虽会让人感觉有点凉，但仍适宜旅游，可不要错过机会呦！"
        },
        {
          "title": "感冒",
          "zs": "易发",
          "tipt": "感冒指数",
          "des": "昼夜温差大，且空气湿度较大，易发生感冒，请注意适当增减衣服，加强自我防护避免感冒。"
        },
        {
          "title": "运动",
          "zs": "较适宜",
          "tipt": "运动指数",
          "des": "天气较好，无雨水困扰，较适宜进行各种运动，但因天气凉，在户外运动请注意增减衣物。"
        },
        {
          "title": "紫外线强度",
          "zs": "最弱",
          "tipt": "紫外线强度指数",
          "des": "属弱紫外线辐射天气，无需特别防护。若长期在户外，建议涂擦SPF在8-12之间的防晒护肤品。"
        }
      ],
      "weather_data": [
        {
          "date": "周四 02月25日 (实时：4℃)",
          "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/qing.png",
          "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/qing.png",
          "weather": "晴",
          "wind": "微风",
          "temperature": "7 ~ -5℃"
        },
        {
          "date": "周五",
          "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/duoyun.png",
          "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/qing.png",
          "weather": "多云转晴",
          "wind": "微风",
          "temperature": "8 ~ -3℃"
        },
        {
          "date": "周六",
          "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/duoyun.png",
          "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/yin.png",
          "weather": "多云转阴",
          "wind": "微风",
          "temperature": "6 ~ -3℃"
        },
        {
          "date": "周日",
          "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/duoyun.png",
          "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/qing.png",
          "weather": "多云转晴",
          "wind": "北风3-4级",
          "temperature": "6 ~ -4℃"
        }
      ]
    }
  ]
}

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