ePaper-Based Local Rain Forecast for Fair Weather Cyclists

/* ****************************************************************************************
   Weather forecast project: Returns the propability to rain within the next hour for your
   specific location. This data is powered by Dark Sky and its API services - thanks!
   
   Please follow the instructions at https://www.hackster.io/robert-poser/epaper-based-
   local-rain-forecast-for-fair-weather-cyclists-cb168c
   
   Prior compiling you will need to add the following two libraries "Adafruit GFX" and 
   "PL_microEPD" by using the Library Manager.
   
   We invested time and resources providing this open source code. Please support Paperino 
   open source hardware by purchasing this product @Crowdsupply @Paperino @Plasticlogic 
   https://www.crowdsupply.com/robert-poser/paperino 
   Created by Robert Poser, Aug 19th 2017, Dresden/Germany
**************************************************************************************** */
#include "Adafruit_GFX.h"
#include "PL_microEPD.h"

#define EPD_RST     A0
#define EPD_BUSY    A1
#define EPD_CS      A2

PL_microEPD display(EPD_CS, EPD_RST, EPD_BUSY);  

void setup() {  
    Time.zone(+2);                  // Please adjust time zone according to your location
                                    // Subscription to a webhook event "WeatherForecast"
    Particle.subscribe("hook-response/WeatherForecast", myHandler, MY_DEVICES);
    
    SPI.begin();                    // SPI-Bus initialisation
    SPI.setBitOrder(MSBFIRST);                 
    SPI.setDataMode(SPI_MODE0); 
    SPI.setClockDivider(SPI_CLOCK_DIV4);
    
    display.begin();                // Paperino ePaper initialisation and refresh screen 
}


void myHandler(const char *event, const char *data) {
    String wh_result = data;
    String tempStr;
    float tempF;
    
    display.setTextSize(1);
    display.print("1hr-Forecast   ");
    display.print(Time.hour());
    display.print(":");
    display.print(Time.minute());
    display.println(" Uhr");
    wh_result = wh_result.substring(wh_result.indexOf("~")+1, wh_result.length());
    tempStr = wh_result.substring(0, wh_result.indexOf("~"));
    display.setTextSize(3);
    display.setCursor(0, 15);
    display.print(tempStr.substring(0, tempStr.indexOf(".")+2));
    display.drawCircle(77, 18, 3, EPD_BLACK);
    display.drawCircle(77, 18, 4, EPD_BLACK);
    display.drawCircle(77, 18, 2, EPD_BLACK);
    display.setCursor(83, 15);
    display.println("C");
    wh_result = wh_result.substring(wh_result.indexOf("~")+1, wh_result.length());
    tempStr = wh_result.substring(0, wh_result.indexOf("~"));
    display.print("Rain:");
    tempF = 100*tempStr.toFloat();
    display.print(int(tempF));
    display.println("%");
    display.update();
}

void loop() { 
    Particle.publish("WeatherForecast");
    delay(10000);              // Time to go to deep sleep
    System.sleep(SLEEP_MODE_DEEP,5*60);
}