Final Project for Maker Revolution FRS 002 UC Davis

Weather_Display.ino

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ArduinoJson.h>

// pin identification numbers
const int datapin1 = 4;
const int loadpin1 = 5;
const int clockpin1 = 14;
const int datapin2 = 12;
const int loadpin2 = 13;
const int clockpin2 = 15;

// wifi credentials
const char ssid[] = "SSID";
const char pw[] = "WIFI_PASSWORD";

// http request
#define refresh (1000*60*1)
#define key "YOUR_API_KEY_HERE"
#define url "http://api.openweathermap.org"
#define zip "95616"
const char req[] = url "/data/2.5/weather?zip=" zip "&APPID=" key;

// data for LEDs
int data1 = 0;
int data2 = 0;
float temp = 0;
float tempmin = 0;
float tempmax = 0;

// weather conditions
typedef enum {
  none = 0,
  sun = 1,
  rain = 2,
  clouds = 3
}conditions;

// current display
typedef enum {
  none2 = 0,
  minimum = 1,
  maximum = 2,
  current = 3
}cdisp;

conditions curr = none;

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pins as outputs.
  pinMode(datapin1, OUTPUT);
  pinMode(loadpin1, OUTPUT);
  pinMode(clockpin1, OUTPUT);
  pinMode(datapin2, OUTPUT);
  pinMode(loadpin2, OUTPUT);
  pinMode(clockpin2, OUTPUT);

  wificonnect();
}

void wificonnect() {
  Serial.begin(115200);
  Serial.println("Starting...");
  WiFi.begin(ssid, pw);
  while(WiFi.status()!=WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected!");
}

void getrequest() {
  if(WiFi.status()==WL_CONNECTED) {
    HTTPClient http;
    Serial.println(req);
    http.begin(req);
    int code = http.GET();
    Serial.println("Status Code: " + (String)code);
    if(code>0) {
      String response = http.getString();
      Serial.println(response);
      parsejson(response);
    }
    http.end();
  }
}

void parsejson(String j) {
  StaticJsonBuffer<3*1024> jsonBuffer;
  JsonObject& root = jsonBuffer.parseObject(j);
  temp = root["main"]["temp"];
  tempmin = root["main"]["temp_min"];
  tempmax = root["main"]["temp_max"];
  const String cond = root["weather"][0]["main"];
  Serial.println("Temperature: " + (String)temp + " K, (" + (String)tempmin + ", " + (String)tempmax + ")");
  Serial.println("Condition: " + cond);
  if(cond=="Clear") {
    curr = sun;
  } else if(cond=="Haze"||cond=="Clouds"||cond=="Snow") {
    curr = clouds;
  } else if(cond=="Drizzle"||cond=="Rain"||cond=="Extreme") {
    curr = rain;
  } else {
    curr = none;
  }
}

// the loop function runs over and over again forever
void loop() {
  getrequest();
  for(int i=0; i<3; i++) {
    data1 = 0;
    data2 = 0;
    switch(i) {
      case 0: // min temp
        show(minimum);
        temperature(tempmin);
        weather(curr);
        lightpin(1, (char)data1);
        lightpin(2, (char)data2);
        delay(refresh / 3);
        break;
      case 1: // max temp
        show(maximum);
        temperature(tempmax);
        weather(curr);
        lightpin(1, (char)data1);
        lightpin(2, (char)data2);
        delay(refresh / 3);
        break;
      case 2: // current temp
        show(current);
        temperature(temp);
        weather(curr);
        lightpin(1, (char)data1);
        lightpin(2, (char)data2);
        delay(refresh / 3);
        break;
      default: // error
        return;
    }
  }
}

// lights specific LEDs based on the temperature (Kelvin)
void temperature(float K) {
  const int F = ((K - 273) * 9) / 5 + 32;
  if(F<45) { // 45 F (or lower)
    // 00100000
    data1 += 32;
  } else if(F<60) { // 45-60 F
    // 00110000
    data1 += 48;
  } else if(F<75) { // 60-75 F
    // 01110000
    data1 += 112;
  } else if(F<90) { // 75-90 F
    // 11110000
    data1 += 240;
  } else { // 90s F (and higher)
    // 11111000
    data1 += 248;
  }
}

// lights specific LEDs based on the weather conditions
void weather(conditions c) {
  switch(c) {
    case (sun):
      // 00000100
      data1 += 4; return;
    case (rain):
      // 00000010
      data1 += 2; return;
    case (clouds):
      // 00000001
      data1 += 1; return;
    default:
      return;
  }
}

// lights specific LEDs based on the current display
void show(cdisp d) {
  switch(d) {
    case (minimum):
      // 01000100
      data2 += 64; return;
    case (maximum):
      // 00100001
      data2 += 33; return;
    case (current):
      // 10000010
      data2 += 130; return;
    default:
      return;
  }
}

// lights specific LEDs
void lightpin(int shiftout, byte data) {
  if(shiftout == 1) { // use shift register 1
    digitalWrite(loadpin1, LOW);
    shiftOut(datapin1, clockpin1, MSBFIRST, data);
    digitalWrite(loadpin1, HIGH);
  } else { // use shift register 2
    digitalWrite(loadpin2, LOW);
    shiftOut(datapin2, clockpin2, MSBFIRST, data);
    digitalWrite(loadpin2, HIGH);
  }
}