Install Rasbperry Pi OS 글타래는 아래 같이 구성되며 OS 설치, Service 구성 및 사용에 대해 작성한다.

1. Raspberry Pi 설치준비
2. Install Raspbian OS
3. Managing Service daemon
4. Basic OS Security for Server
5. Install & Configuration - Nginx, Node JS, Jupyter

2017-10-30: swap 추가, timezone 수정
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OpenweatherMap

날씨 정보를 제공하는 OpenAPI로 APi key를 발급받아 사용한다.

https://www.openweathermap.org/

Usage

OpenWeatherMap은 API 호출시 API Key를 APPID 파라미터로 전달한다. 예를 들어 서울의 날씨를 얻으려면

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api.openweathermap.org/data/2.5/weather?q={city name}
api.openweathermap.org/data/2.5/weather?q={city name},{country code}

그러나 한 API Key로 10분에 1번 호출 해야 한다.

API Key

4ecbcfa0c4210bfff11d93ea02cd9290

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http://api.openweathermap.org/data/2.5/weather?q=seoul,kr&appid=4ecbcfa0c4210bfff11d93ea02cd9290

API 가입

https://openweathermap.org/api 에서 원하는 API를 골라 Subscribe 한 후에 사용할 수 있다. 가입 자격에 따라서 API 호출 빈도가 달라진다.

Weather data

JSON
Example of API respond:

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{
  "coord": {
    "lon": 126.98,
    "lat": 37.57
  },
  "weather": [
    {
      "id": 701,
      "main": "Mist",
      "description": "mist",
      "icon": "50n"
    }
  ],
  "base": "stations",
  "main": {
    "temp": 276.15,
    "pressure": 1013,
    "humidity": 64,
    "temp_min": 276.15,
    "temp_max": 276.15
  },
  "visibility": 11265,
  "wind": {
    "speed": 5.7,
    "deg": 310
  },
  "clouds": {
    "all": 90
  },
  "dt": 1523044560,
  "sys": {
    "type": 1,
    "id": 7673,
    "message": 0.0075,
    "country": "KR",
    "sunrise": 1522962579,
    "sunset": 1523008779
  },
  "id": 1835848,
  "name": "Seoul",
  "cod": 200
}

Parameters:

• coord
  • coord.lon City geo location, longitude
  • coord.lat City geo location, latitude
• weather (more info Weather condition codes)
  • weather.id Weather condition id
  • weather.main Group of weather parameters (Rain, Snow, Extreme etc.)
  • weather.description Weather condition within the group
  • weather.icon Weather icon id
• base Internal parameter
  main
  main.temp Temperature. Unit Default: Kelvin, Metric: Celsius, Imperial: Fahrenheit.
  main.pressure Atmospheric pressure (on the sea level, if there is no sea_level or grnd_level data), hPa
  main.humidity Humidity, %
  main.temp_min Minimum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally). Unit Default: Kelvin, Metric: Celsius, Imperial: Fahrenheit.
  main.temp_max Maximum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally). Unit Default: Kelvin, Metric: Celsius, Imperial: Fahrenheit.
  main.sea_level Atmospheric pressure on the sea level, hPa
  main.grnd_level Atmospheric pressure on the ground level, hPa
  wind
  wind.speed Wind speed. Unit Default: meter/sec, Metric: meter/sec, Imperial: miles/hour.
  wind.deg Wind direction, degrees (meteorological)
  clouds
  clouds.all Cloudiness, %
  rain
  rain.3h Rain volume for the last 3 hours
  snow
  snow.3h Snow volume for the last 3 hours
  dt Time of data calculation, unix, UTC
  sys
  sys.type Internal parameter
  sys.id Internal parameter
  sys.message Internal parameter
  sys.country Country code (GB, JP etc.)
  sys.sunrise Sunrise time, unix, UTC
  sys.sunset Sunset time, unix, UTC
  id City ID
  name City name
  cod Internal parameter