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Dan FeinAdam WilliamsAmy Fischlin
Published

RGB LED Weather Map 

The Spark brings the wunderground.com API to life

Full instructions provided5,028
RGB LED Weather Map 
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Things used in this project

Hardware components

Resistor 330 ohm
Resistor 330 ohm
To reduce NeoPixel burnout risk, add 300 - 500 Ohm resistor on first pixel's data input and minimize distance between Arduino and first pixel.
×1
Spark Core
Particle Spark Core
Fed data over wifi
×1
RGB addressable LEDs
×100
WS2801 controllers
In series
×100
5V 2A wall wart plug
Powering the whole installation
×1
1000 µf cap
To reduce NeoPixel burnout risk, add 1000 uF capacitor across pixel power leads,
×1

Story

Read more

Code

file_7505.txt

C/C++
Spark Core Code
#include "application.h"
//#include "spark_disable_wlan.h" (for faster local debugging only)
#include "neopixel/neopixel.h"

// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 100
#define PIXEL_TYPE WS2812B

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);
Adafruit_NeoPixel rain = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);
Adafruit_NeoPixel heat = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup() 
{
  strip.begin();
  Spark.function("rainbow", call_rainbow);
  Spark.function("heatmap", call_heatmap);
  Spark.function("rainmap", call_rainmap);
  strip.show(); // Initialize all pixels to 'off'
}
void loop() 
{
    //loop_rainbow(1);
    //loop_heatmap(3000);
    //loop_rainmap(3000);
    
}

int call_rainmap(String number) {
    
    
    rain.show();
    
    int delim_index = 0;
    int start_index = 0;
    int second_index = 0;
    //String loc = number.substring(0, delim_index);
    //String val = number.substring(delim_index+1, number.length());
    
    //uint16_t[] vals = new uint16_t[100];
    
    for(int i=0; i<5; i++) {
        
        delim_index = number.indexOf(':', start_index);
        second_index = number.indexOf(';', delim_index);
        
        String loc = number.substring(start_index, delim_index);
        String val = number.substring(delim_index+1, second_index);
        
        start_index = second_index+1;
        
        int pos = loc.toInt();
        int col = val.toInt();
        
        //uint16_t[i] = col;
        uint16_t num16 = pos;
        uint16_t col16 = col;
        rain.setPixelColor(num16, Wheel(col16 & 255));
    }
    
    rain.setBrightness(25);
    
    //rain.show();
    //rainbow(5);
    delay(20);
    return 0;
}

int call_heatmap(String number) {
    
    heat.show();
    
    int delim_index = 0;
    int start_index = 0;
    int second_index = 0;
    //String loc = number.substring(0, delim_index);
    //String val = number.substring(delim_index+1, number.length());
    
    //uint16_t[] vals = new uint16_t[100];
    
    for(int i=0; i<5; i++) {
        
        delim_index = number.indexOf(':', start_index);
        second_index = number.indexOf(';', delim_index);
        
        String loc = number.substring(start_index, delim_index);
        String val = number.substring(delim_index+1, second_index);
        
        start_index = second_index+1;
        
        int pos = loc.toInt();
        int temp = val.toInt();
        
        //uint32_t col = 0;
        uint16_t num16 = pos;
         
        if(temp < 30) {
            heat.setPixelColor(num16, 0, 164, 255);
        } else if (temp < 40) {
            heat.setPixelColor(num16, 255, 0, 255);
        } else if (temp < 45) {
            heat.setPixelColor(num16, 255, 127, 0);
        } else if (temp < 50) {
            heat.setPixelColor(num16, 255, 206, 0);
        } else if (temp < 55) {
            heat.setPixelColor(num16, 255, 254, 0);
        } else if (temp < 60) {
            heat.setPixelColor(num16, 230, 255, 1);
        } else if (temp < 65) {
            heat.setPixelColor(num16, 203, 255, 0);
        } else if (temp < 70) {
            heat.setPixelColor(num16, 174, 255, 0);
        } else if (temp < 75) {
            heat.setPixelColor(num16, 153, 255, 0);
        } else if (temp < 80) {
            heat.setPixelColor(num16, 127, 255, 0);
        } else {
            heat.setPixelColor(num16, 7, 255, 0);
        }
        
        //uint16_t[i] = col;
        //uint16_t num16 = pos;
        //uint16_t col16 = col;
        //heat.setPixelColor(num16, Wheel(col16 & 255));
        //heat.setPixelColor(num16, col);
    }

    heat.setBrightness(25);

    heat.show();
    //rainbow(5);
    delay(20);
    return 0;
}

int call_rainbow(String number) {
    rainbow(5);
}

void loop_rainbow(uint8_t wait) {
  uint16_t i, j, k;
  
  for(int k=0; k<wait; k++) {
    for(j=0; j<256; j++) {
        for(i=0; i<strip.numPixels(); i++) {
            strip.setPixelColor(i, Wheel((i+j) & 255));
        }
        strip.show();
        delay(20);
    }
    //delay(100);
  }
}

void loop_rainmap(int wait) {
    
    rain.show();
    delay(wait);
}

void loop_heatmap(int wait) {
    
    heat.show();
    delay(wait);
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  if(WheelPos < 85) {
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if(WheelPos < 170) {
   WheelPos -= 85;
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}

file_7506.js

JavaScript
Node.js script to call the API, send if over to the spark core, saving memory in the device.
/*jslint node: true */
"use strict";

var _ = require('underscore');
var request = require('request');
var spark = require('spark');
var async = require('async');


var map = [];

// Login as usual
var promise = spark.login({ username: 'xxxxxxxxxx', password: 'xxxxxxx' });


var fetch = function(loc, cb) {

 request(loc.url, function(error, response, body) {
    if (!error && response.statusCode == 200) {
//            console.log(body) // Print the google web page.
      var data = JSON.parse(body);
//        console.log(data.current_observation.station.name);
//        console.log(data.current_observation.temperature);
      if(data && data.current_observation) {
        var temp = data.current_observation.temperature;
        var precip_today = data.current_observation.precip_today;
        var color;
        /*
        if(precip_today) {
          color = 155;
        } else {
          color = 65;
        }
        */
        /*
        if(temp >= 60) {
          color = '255';
        }
        if(temp < 60) {
          color = '155';
        }
        */
        color = Math.floor(temp);
//        var command = index + ':' + color;
//        map[index].command = command;
        cb(null, color);

//        console.log(command);
//        console.log(color);
      } else {
        cb(null, '001');
      }
    } else {
      cb("error 1");
    }
  });

};

var spark_device = null;

var batch_send = function(command, cb) {

  console.log('sending command: ' + command);
  spark_device.callFunction('heatmap', command, function(err, data) {
    if (err) {
      console.log('An error occurred:', err);
      cb(err);
    } else {
      console.log('Function called succesfully:', data);
      cb(null);
    //                rec_call(device, index+1);
    }
  });
}



promise.then(
  function(token){
    // If login is successful we get and accessToken,
    // we'll use that to call Spark API ListDevices
    var devicesPr = spark.listDevices();

    devicesPr.then(
      // We get an array with devices back and we list them
      function(devices){
        console.log('API call List Devices completed on promise resolve: ', devices);
        var device = devices[0];
        spark_device = device;

        async.map(map, fetch, function(err, results) {
          if(err) {
            console.log('async map error occurred:', err);
          } else {
            console.log('results found');
            console.log(results);
            var command = "";
            var count = 4;
            var it = 0;
            var command_set = [];
            _.each(results, function(el, index) {
              command += index + ':' + el + ';';
              if(it < count) {
                it++;
              } else {
                command_set.push(command);
                command = "";
                it = 0;
              }
            });
//            command_set.push(command);
            console.log(command_set);
            console.log(command);

            async.eachSeries(command_set, batch_send, function(err) {
              if(err) {
                console.log("error occurred: " + err);
              } else {
                console.log("no errors!");
              }
            });
            
            
          }
          //rec_call(device, 0);

         });

      },
      function(err) {
        console.log('API call List Devices completed on promise fail: ', err);
      }
    );
  },
  function(err) {
    console.log('API call completed on promise fail: ', err);
  }
);

function rec_call(device, index) {
  if(index > 99) return;
  var command = map[index].command;
  console.log("index: " + index);
  device.callFunction('rainbow', command, function(err, data) {
    if (err) {
      console.log('An error occurred:', err);
    } else {
      console.log('Function called succesfully:', data);
      rec_call(device, index+1);
    }
  });
}



function blah() {

  var locations = [
    {'lat':'34', 'lon': '-111'},
    {'lat':'37', 'lon': '-112'},
    {'lat':'41', 'lon': '-123'},
    {'lat':'45', 'lon': '-122'},
    {'lat':'47', 'lon': '-122'},
    {'lat':'45', 'lon': '-119'},
    {'lat':'42', 'lon': '-119'},
    {'lat':'40', 'lon': '-118'},
    {'lat':'38', 'lon': '-118'},
    {'lat':'33', 'lon': '-116'},
    {'lat':'35', 'lon': '-115'},
    {'lat':'33', 'lon': '-114'},
    {'lat':'34', 'lon': '-113'},
    {'lat':'36', 'lon': '-113'},
    {'lat':'39', 'lon': '-114'},
    {'lat':'41', 'lon': '-117'},
    {'lat':'45', 'lon': '-116'},
    {'lat':'47', 'lon': '-117'},
    {'lat':'47', 'lon': '-114'},
    {'lat':'46', 'lon': '-110'},
    {'lat':'42', 'lon': '-112'},
    {'lat':'40', 'lon': '-111'},
    {'lat':'39', 'lon': '-111'},
    {'lat':'35', 'lon': '-110'},
    {'lat':'32', 'lon': '-110'},
    {'lat':'31', 'lon': '-109'},
    {'lat':'33', 'lon': '-108'},
    {'lat':'36', 'lon': '-108'},
    {'lat':'39', 'lon': '-108'},
    {'lat':'41', 'lon': '-108'},
    {'lat':'45', 'lon': '-107'},
    {'lat':'46', 'lon': '-108'},
    {'lat':'47', 'lon': '-104'},
    {'lat':'46', 'lon': '-103'},
    {'lat':'42', 'lon': '-104'},
    {'lat':'40', 'lon': '-104'},
    {'lat':'38', 'lon': '-105'},
    {'lat':'34', 'lon': '-106'},
    {'lat':'32', 'lon': '-106'},
    {'lat':'30', 'lon': '-103'},
    {'lat':'33', 'lon': '-102'},
    {'lat':'35', 'lon': '-102'},
    {'lat':'39', 'lon': '-101'},
    {'lat':'40', 'lon': '-101'},
    {'lat':'43', 'lon': '-100'},
    {'lat':'47', 'lon': '-101'},
    {'lat':'48', 'lon': '-98'},
    {'lat':'45', 'lon': '-98'},
    {'lat':'41', 'lon': '-98'},
    {'lat':'40', 'lon': '-99'},
    {'lat':'36', 'lon': '-99'},
    {'lat':'34', 'lon': '-99'},
    {'lat':'33', 'lon': '-97'},
    {'lat':'30', 'lon': '-100'},
    {'lat':'28', 'lon': '-98'},
    {'lat':'29', 'lon': '-95'},
    {'lat':'33', 'lon': '-96'},
    {'lat':'35', 'lon': '-94'},
    {'lat':'37', 'lon': '-94'},
    {'lat':'40', 'lon': '-93 '},
    {'lat':'43', 'lon': '-94'},
    {'lat':'47', 'lon': '-94'},
    {'lat':'46', 'lon': '-90'},
    {'lat':'42', 'lon': '-91'},
    {'lat':'38', 'lon': '-90'},
    {'lat':'36', 'lon': '-91'},
    {'lat':'33', 'lon': '-92'},
    {'lat':'30', 'lon': '-93'},
    {'lat':'29', 'lon': '-90'},
    {'lat':'33', 'lon': '-88'},
    {'lat':'34', 'lon': '-88'},
    {'lat':'39', 'lon': '-87'},
    {'lat':'40', 'lon': '-87'},
    {'lat':'44', 'lon': '-86'},
    {'lat':'42', 'lon': '-86'},
    {'lat':'38', 'lon': '-86'},
    {'lat':'35', 'lon': '-86'},
    {'lat':'33', 'lon': '-86'},
    {'lat':'30', 'lon': '-85'},
    {'lat':'33', 'lon': '-85'},
    {'lat':'35', 'lon': '-85'},
    {'lat':'39', 'lon': '-85'},
    {'lat':'42', 'lon': '-84'},
    {'lat':'45', 'lon': '-83'},
    {'lat':'39', 'lon': '-82'},
    {'lat':'38', 'lon': '-82'},
    {'lat':'33', 'lon': '-82'},
    {'lat':'31', 'lon': '-81'},
    {'lat':'28', 'lon': '-82'},
    {'lat':'25', 'lon': '-80'},
    {'lat':'29', 'lon': '-79'},
    {'lat':'33', 'lon': '-80'},
    {'lat':'43', 'lon': '-80'},
    {'lat':'39', 'lon': '-80'},
    {'lat':'43', 'lon': '-80 '},
    {'lat':'45', 'lon': '-80'},
    {'lat':'46', 'lon': '-80'},
    {'lat':'46', 'lon': '-70'},
    {'lat':'42', 'lon': '-71'},
    {'lat':'33', 'lon': '-44'}
  ];


  var high = -999;
  var low = 999;
  for(var i=0; i<locations.length; i++) {
    console.log(i);
    var point = locations[i]
    map[i] = {}
    map[i].loc = point;
    map[i].url = 'http://api.wxug.com/api/xxxxxAPIKEYxxxx/conditions/v:2.0/lang:EN/units:english/q/' + point.lat + ',' + point.lon + '.json';
    //console.log(map[i]);
    /*
    request(map[i].url, function(error, response, body) {
      if (!error && response.statusCode == 200) {
//            console.log(body) // Print the google web page.
        var data = JSON.parse(body);
//        console.log(data.current_observation.station.name);
//        console.log(data.current_observation.temperature);
        if(data && data.current_observation) {
          var temp = data.current_observation.temperature;
          if(temp > 70) {
            high = temp;
          }
          if(temp < low) {
            low = temp;
          }
          console.log("high: " + high);
          console.log("low: " + low);
        }
      }
    });
    */
  }
}

blah();

Credits

Dan Fein
6 projects • 52 followers
Information omnivore, Human potential optimist, Pathological Enabler.
Contact
Adam Williams
1 project • 6 followers
Contact
Amy Fischlin
2 projects • 13 followers
I am Amy.
Contact

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Related channels and tags
  • Displays
  • Displays
  • NeoPixel
  • Particle
  • Weather
  • Weather
  • Weather Underground