Team A TEMPorary Solution:

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Published April 19, 2019 © CC0

A TEMPorary Solution

Wearing shirts and shorts, but it's 40 degrees outside? Wearing a hoodie and sweats, but it's 103? Never again with a TEMPorary Solution.

BeginnerFull instructions provided2 hours812

Things used in this project

Hardware components

Seeed Studio Grove Starter Kit for LaunchPad

Texas Instruments EK-TM4C123GXL TM4C Tiva LaunchPad

Buzzer

DFRobot DHT22 Temperature and Humidity Sensor

Display Driver, LCD 4 Digit

PIR Motion Sensor (generic)

Software apps and online services

Texas Instruments Energia

Story

Story

Our project is a temperature notification device, and our main use case is as follows: Suppose you wake up late for class. You jump out of bed, throw some shorts on, grab your backpack, and start running. But in your hurry, you didn't realize that it's 32 degrees outside—now, you're outside and freezing cold. This is where our project comes into play. When you reach the door, before you even get outside, it will know that it's cold and start beeping when you get near. You can then look at the 4 digit display, recognize that you need a jacket, and properly prepare yourself.

And that's not all. If it's hot outside, the project will beep with a different noise—alerting you to the fact that it's warm and you may want to put some shorts on. If it's neither hot nor cold, the project will not beep at all. Instead, it will sit silently, waiting until it's needed again.

So why is this useful? It ensures that you're comfortable as you go about your day. We've all been overdressed for a warm day. We've all, unnecessarily, sweat through a shirt or a jacket. And that will never happen again with our device. That's why we made it. We know it's not going to change the world, but it will save us from the mild inconvenience of being unprepared for the day.

Build Instructions

1. Connect the Tiva Launchpad to the Bottom of the Grove Base so that all the letters are facing the same way.

2. Connect the following the proper Ports:

Temperature Humidity Sensor to port J6(A)

Buzzer to port J13(D)

4 Digit Display to J15(D)

PIR Motion Sensor to J17(D)

Now your build is complete, with all the necessary modules and boards. It should look like this:

Operation Instructions

1. Connect the Tiva Launchpad to your computer with the provided Micro USB Cable.

2. Put the PIR into the empty Grove Seeed Box, in order to simulate the motion of a person walking by the door.

3. Open Energia and the provided code for A TEMPorary Solution

4. Run the code.

5. Open and close the box to check if the device works properly.

Demonstration Video:

Real World

Future Plans

In the future, we will use wireless technology to make this project more effective and more useable. Currently, it only beeps at you when you're close to your door, as the temperature sensor has to be outside. However, it would be more effective if the temperature sensor was detached from the rest of the system. This would allow you could get beeped at right as you get out of bed, as opposed to when you're already on your way out of the door. Given more time, we also would have liked to detach the launchpad from the device, so that it doesn't need a laptop to run.

Code

A TEMPorary Solution

/*
 Grove Temperature & Humidity Sensor Pro
 
 Read value from Temperature & Humidity sensor then display on 
 the Grove 4-Digit Display.
 
 The circuit:
 * 4-Digit Display attached to Pin 38 and 39 (J14 plug on Grove Base BoosterPack)
 * Rotary Angle Sensor attached to Pin 24 (J6 plug on Grove Base BoosterPack)
 * sig pin of the Grove-Temperature-Humidity Sensor to the analog pin A1

 
 * Note: Put your hands on Temperature & Humidity Sensor, both of the values 
         will rise. 
         
         4-Digit Display:
         |--------------------------|
         | temperature :  humidity  |    
         |--------------------------| 
 
 This example code is in the public domain.
 
 http://www.seeedstudio.com/depot/Grove-TemperatureHumidity-Sensor-Pro-p-838.html 
 
 */
 
#include "TM1637.h" 
#include "DHT.h"

/* Macro Define */
#define TEMP_HUMI_PIN     24                 /* pin of temperature&humidity sensor */
#define PIR_MOTION_SENSOR        36            /* sig pin of the PIR sensor */
#define CLK               38          /* 4-Digit Display clock pin */
#define DIO               37          /* 4-Digit Display data pin */
#define BUZZER_PIN               40            /* sig pin of the Grove Buzzer */
#define LED                      RED_LED      /* LED */


int length = 15;         /* the number of notes */
char notes[] = "ccggaagffeeddc "; //notes in the song
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 }; //length of each note
int tempo = 200;

/* Global Variables */
TM1637 tm1637(CLK, DIO);                  /* 4-Digit Display object */
DHT dht(TEMP_HUMI_PIN, DHT22);            /* temperature&humidity sensor object */

int8_t t_bits[2] = {0};                   /* array to store the single bits of the temperature */
int8_t h_bits[2] = {0};                   /* array to store the single bits of the humidity */  

/* the setup() method runs once, when the sketch starts */
void setup() 
{    
    tm1637.init();                       /* initialize 4-Digit Display */
    tm1637.set(BRIGHT_TYPICAL);          /* set the brightness */    
    tm1637.point(POINT_ON);              /* light the clock point ":" */
        
    dht.begin();                         /* initialize temperature humidity sensor */
    pinMode(BUZZER_PIN, OUTPUT);      
    pinMode(PIR_MOTION_SENSOR, INPUT);   /* declare the sig pin as an INPUT */
    pinMode(LED, OUTPUT);            /* declare the LED pin as an OUTPUT */
    digitalWrite(LED, LOW);
}

/* the loop() method runs over and over again */
void loop() 
{   
    int _temperature = dht.readTemperature();   /* read the temperature value from the sensor */
    int temp = dht.readTemperature();
    //int _temperature = 28;
    //int temp = 28;

    //int _temperature = 10;
    //int temp = 10;
    
    int _humidity = dht.readHumidity();                   /* read the humidity value from the sensor */    
             
    memset(t_bits, 0, 2);                                 /* reset array before we use it */
    memset(h_bits, 0, 2);                                 /* reset array before we use it */
    
    /* 4-Digit Display [0,1] is used to display temperature */
    t_bits[0] = _temperature % 10;
    _temperature /= 10;
    t_bits[1] = _temperature % 10;
    
    /* 4-Digit Display [2,3] is used to display humidity */ 
    h_bits[0] = _humidity % 10;
    _humidity /= 10;
    h_bits[1] = _humidity % 10;
    
    /* show it */
    tm1637.display(1, t_bits[0]);
    tm1637.display(0, t_bits[1]);
    
    tm1637.display(3, h_bits[0]);
    tm1637.display(2, h_bits[1]);

    
    if(isMotionDetected()) 
    {
        digitalWrite(LED, HIGH); 
        if(temp >= 27){
          playNote(notes[7], beats[0] * tempo);
        }
        if(temp <= 16){
          playNote(notes[7], beats[0] * tempo*2);
          playNote(notes[7], beats[0] * tempo*2);
        }/* if we detect movement, turn on the LED */
    } 
    else 
    {
        digitalWrite(LED, LOW);          /* no movement, turn off the light */
    }
    for(int i = 0; i<10000; i++){}
}

/* play tone */
void playTone(int tone, int duration) 
{
  for (long i = 0; i < duration * 1000L; i += tone * 2) 
  {
    digitalWrite(BUZZER_PIN, HIGH);
    delayMicroseconds(tone);
    digitalWrite(BUZZER_PIN, LOW);
    delayMicroseconds(tone);
  }
}

char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };

void playNote(char note, int duration) 
{
  
  
  // play the tone corresponding to the note name
  for (int i = 0; i < 8; i++) 
  {
    if (names[i] == note) 
    {
      playTone(500, duration);
    }
  }
}

boolean isMotionDetected() 
{
    int sensor_val = digitalRead(PIR_MOTION_SENSOR);        /* read sig pin */
    if(sensor_val == HIGH) 
    {
        return true;                                        /* motion detected */
    } 
    else 
    {
        return false;                                       /* no motion detected */
    }
}