presence.ino

#include "LedControl-MAX7219-MAX7221/LedControl-MAX7219-MAX7221.h"
#include "HttpClient/HttpClient.h"

HttpClient http;
#define VARIABLE_ID "544e4as8f7625426e332b1e8e"
#define TOKEN "pSZJt9W7vdfgW3fpUsRYNKiDMgJ770NK"

int presence = 0;

LedControl *led;// LedControl object

uint8_t data = A5;
uint8_t load = A4;
uint8_t myclock = A3;

// Headers needed by Ubidots API
http_header_t headers[] = {
      { "Content-Type", "application/json" },
      { "X-Auth-Token" , TOKEN },
    { NULL, NULL } // NOTE: Always terminate headers will NULL
};

http_request_t request;
http_response_t response;

void setup() {
    pinMode(D1, INPUT);
    request.port = 80;
    request.hostname = "things.ubidots.com";
    request.path = "/api/v1.6/variables/"VARIABLE_ID"/values";
    //Serial.begin(9600);//For Debug purposes
    led = new LedControl(data,myclock,load,1); //DIN,CLK,CS,HowManyDisplays
    led-> shutdown(0,false); //Turn it on
    led-> setIntensity(0,7);//Set Led's Intensity, max value=15
}

void loop() {
     presence=digitalRead(D1);
     //Serial.print("presence: ");//
     //.Serial.println(presence);

    if(presence)
    {   
         request.body = "{\"value\":" + String(presence) + "}"; //Sending presence to Ubidots
         http.post(request, response, headers);
       // Serial.println(response.status); //For debug only
        //Serial.println(response.body);//See the response from the Ubidots Api
        do{
            selectColor(3);//Red color
            led->setColumn(0,0,0x00);
            led->setColumn(0,1,0x22);
            led->setColumn(0,2,0x14);
            led->setColumn(0,3,0x10);
            led->setColumn(0,4,0x10);
            led->setColumn(0,5,0x14);
            led->setColumn(0,6,0x22);
            led->setColumn(0,7,0x00);
            delay(2000);
            presence=digitalRead(D1);
        }while(presence);

    }
        request.body = "{\"value\":" + String(presence) + "}"; //Sending presence to Ubidots
        http.post(request, response, headers);
        selectColor(2);//Green color
        led->setColumn(0,0,0x7E);
        led->setColumn(0,1,0x81);
        led->setColumn(0,2,0x95);
        led->setColumn(0,3,0xB1);
        led->setColumn(0,4,0xB1);
        led->setColumn(0,5,0x95);
        led->setColumn(0,6,0x81);
        led->setColumn(0,7,0x7E);
}

void putByte(byte data_1) //not my function
{
  byte i = 8;
  byte mask;
  while(i > 0)
  {
    mask = 0x01 << (i - 1); // get bitmask

    digitalWrite(myclock, LOW); // tick

    if (data_1 & mask) // choose bit
    {
    digitalWrite(data, HIGH);// send 1
    }
    else
    {
    digitalWrite(data, LOW); // send 0
    }

    digitalWrite(myclock, HIGH); // tock
    --i; // move to lesser bit
  }
}

void selectColor(int cmd) //
{
  byte reg = 0x0c;  //max7219_reg_shutdown
  byte col = 0x01;  //shutdown false
  byte col2 = 0x00;  //shutdown true
  int c = 0;
  digitalWrite(load, LOW);
if (cmd == 0)//Off
{
  for ( c =1; c<= 4; c++) {
    putByte(reg);// specify register
    putByte(col2);//((data & 0x01) * 256) + data >> 1); // put data

    putByte(reg);// specify register
    putByte(col2);//((data & 0x01) * 256) + data >> 1); // put data
  }
}
else if (cmd == 2)//Green
{
     led-> setIntensity(0,14);

  for ( c =1; c<= 4; c++) {
    putByte(reg);// specify register
    putByte(col);//((data & 0x01) * 256) + data >> 1); // put data

    putByte(reg);// specify register
    putByte(col2);//((data & 0x01) * 256) + data >> 1); // put data
  }
}
else if (cmd == 3)//Red
{
   
    led-> setIntensity(0,3);
  for ( c =1; c<= 4; c++) 
  {
    putByte(reg);// specify register
    putByte(col2);//((data & 0x01) * 256) + data >> 1); // put data

    putByte(reg);// specify register
    putByte(col);//((data & 0x01) * 256) + data >> 1); // put data
  }
}
  digitalWrite(load, LOW);
  digitalWrite(load,HIGH);
}