https://github.com/cheton/iot-weather-display

IoT Weather Display with Johnny-Five
https://github.com/cheton/iot-weather-display

Last synced: 10 days ago
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IoT Weather Display with Johnny-Five

• Host: GitHub
• URL: https://github.com/cheton/iot-weather-display
• Owner: cheton
• License: mit
• Created: 2015-09-21T02:58:59.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2022-04-24T02:37:31.000Z (over 2 years ago)
• Last Synced: 2024-10-29T16:26:41.122Z (20 days ago)
• Language: JavaScript
• Homepage:
• Size: 256 KB
• Stars: 4
• Watchers: 5
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# IoT Weather Display

IoT Weather Display with Johnny-Five

![iot-weather-display.jpg](iot-weather-display.jpg)

### Breadboard for "LCD - I2C PCF8574"

![docs/breadboard/lcd-i2c-PCF8574.png](docs/breadboard/lcd-i2c-PCF8574.png)

### Usage

Run with:

```bash

node index.js

```

The `index.js` file:

```js

var five = require('johnny-five');

var board = new five.Board();

var _ = require('lodash');

var moment = require('moment');

var request = require('request');

var WeatherDisplay = function(lcd) {

    this.lcd = lcd;

    // Current weather data (http://openweathermap.org/current)

    // http://openweathermap.org/weather-data

    //

    // Examples:

    // http://api.openweathermap.org/data/2.5/weather?units=metric&q=Taipei

    this._fetchWeatherData = function(callback) {

        var querystring = require('querystring');

        var qs = querystring.stringify({

            'units': 'metric', // metric or imperial

            'q': 'Taipei' // city

        });

        var url = 'http://api.openweathermap.org/data/2.5/weather?' + qs;

        request(url, function(err, rsp, body) {

            if (err || rsp.statusCode !== 200) {

                err = err || new Error(body);

            }

            var data = JSON.parse(body);

            callback(err, data);

        });

    };

};

WeatherDisplay.prototype.load = function() {

    var lcd = this.lcd;

    lcd.clear();

    lcd.cursor(0, 0).print('Loading...');

    this._fetchWeatherData(function(err, data) {

        lcd.clear();

        if (err) {

            lcd.cursor(0, 0).print('Loading data failed.');

            return;

        }

        var name = _.get(data, 'name');

        var dt = moment(_.get(data, 'dt') * 1000).format('YYYY-MM-DD hh:mm:ss');

        var weather = _.get(data, 'weather[0].main');

        var temp = _.get(data, 'main.temp').toFixed(1);

            tempMin = _.get(data, 'main.temp_min').toFixed(1),

            tempMax = _.get(data, 'main.temp_max').toFixed(1);

        var humidity = _.get(data, 'main.humidity');

        var windSpeed = _.get(data, 'wind.speed') * 3600 / 1000; // m/s -> km/h

        lcd.cursor(0, 0).print(dt);

        lcd.cursor(1, 0).print(name + ' (' + weather + ')');

        lcd.cursor(2, 0).print('T:' + temp + ' (' + tempMin + '-' + tempMax + ')');

        lcd.cursor(3, 0).print('H:' + humidity + '%  W:' + windSpeed + 'km/h');

    });

};

board.on('ready', function() {

    // I2C LCD, PCF8574

    var lcd = new five.LCD({

        controller: 'PCF8574',

        rows: 4,

        cols: 20

    });

    var weatherDisplay = new WeatherDisplay(lcd);

    this.repl.inject({

        lcd: lcd,

        weatherDisplay: weatherDisplay

    });

    weatherDisplay.load();

});

```