The Weather Lamp

An IoT project using NodeMCU. The lamp (5050 SMD RGB Led Strip) changes light pattern depending to the weather forecast.

Getting Started

• Download the app:

  git clone git@github.com:ugobriasco/weather-lamp.git && cd ./weather-lamp
  cp ./src/nodemcu-lamp/config.h.template ./src/nodemcu-lamp/config.h

• Get an access token from https://openweathermap.org/api

• Edit the config file:

  vi ./src/nodemcu-lamp/config.h

  # Add API token to the HOSTNAME
  # Update SSID and PASSWORD

• Compile and flash the NodeMCU.
• Check the serial port under 115200 baud and get the IP assigned by wour WAN.
• Open your browser and GET that IP.

Type of weather supported

Weather conditions

Tag	OpenWeather ID range	Current Light behaviour	Planned Light behaviour	Example
Clear	800	Constant	Constant	☀️
Partly-cloudy	801, 802	Constant	Intermittent sinusoidal wave, low pitch	🌤
Overcast	701->762, 803, 804	Constant	Constant sinusoidal wave, low pitch	☁️️ 🌫
Patchy-rain	500 -> 504	Intermittent sinusoidal wave, low pitch	Intermittent white noise burst	🌦
light-snow	600, 611, 612, 615	Intermittent sinusoidal wave, low pitch	Intermittent white noise burst	🌦
Rain	520 -> 531	Intermittent sinusoidal wave, low pitch	White noise	🌧
Snow	511, 601, 602, 616 -> 622	Intermittent sinusoidal wave, low pitch	Intermittent white noise burst	🌨
Storm	200 -> 321, 771, 781	Intermittent sinusoidal wave, low pitch	White noise convolute with hard noise burst	⛈

source: https://openweathermap.org/weather-conditions#Weather-Condition-Codes-2

Temperatures

Tag	Light behaviour	Example
very-hot	Red	>= 30 °C
hot	Yellow	24-29 °C
mild	Green	13-23 °C
cold	Light Blue	5-12 °C
very cold	Deep Blue	< 4 °C

Operating modes

This application can be used in different ways.

Standalone mode

The lamp behaves autonomously, querying Open Weather API. This is the default mode, thus be sure to use the hostame and url defined in config.h. In this mode there is a pretty basic http client to handle basic functions via web-interface

Slave mode

The lamp queries a proxy server which returns the weather data. This allows the installation of multiple weather applications, centralising calls to the Open Weather API.

Proxy weather data

Change the Hostname in the config.h and ensure that whenever tha lamp GET it, it returns the following body:

{
    "lat": 52.51,
    "lon": 13.46,
    "timezone": "Europe/Berlin",
    "timezone_offset": 7200,
    "current": {...}
    "hourly": [  ## IMPORTANT!
        {},
        {}, ## The position in the houlry array should match config::FORECAST_IN_HOURS
        {
            "dt": 1603400400,
            "temp": 15.57,
            "feels_like": 12.58,
            "pressure": 1012,
            "humidity": 76,
            "dew_point": 11.36,
            "clouds": 78,
            "visibility": 10000,
            "wind_speed": 4.88,
            "wind_deg": 220,
            "weather": [ ## IMPORTANT!
                {
                    "id": 803,  ## IMPORTANT!
                    "main": "Clouds",
                    "description": "broken clouds",
                    "icon": "04n"
                }
            ],
            "pop": 0.14
        },
        {

Furtrhermore, it is possible to control the lamp from the proxy (e.g. a custom app toglges the lamp via proxy server). The API of the lamp:

  GET /ledOn
  --> Turns the lamp on

  GET /ledOff
  --> Turns the lamp off