Caleb's data

Team Group 21: caleb padgett, Walker Roberts

Published April 21, 2021 © GPL3+

Group 21 MEGR 3171 Temperature sensor IOT Project

The device will indicate the temperature inside your refrigerator/freezer in Celsius and Fahrenheit.

BeginnerFull instructions provided6 hours251

Group 21 MEGR 3171 Temperature sensor IOT Project

Things used in this project

Hardware components

Particle Argon

Temperature Sensor

Capacitor 100 nF

Resistor 220 ohm

Breadboard (generic)

Photodiode, 45 °

Software apps and online services

Particle Build Web IDE

IFTTT Maker service

Story

The IOT device constructed for our project features the use of a TMP36 sensor that monitors temperature levels and a photodiode that monitors surrounding light. This IOT device solves the problem of not being able to monitor the temperature inside a refrigerator or freezer. The way this problem is solved is the IOT device is placed inside of whatever freezer or fridge needs to be monitored and real time data is recorded on a spreadsheet; the data is gathered by the Particle Argon device and sensors, sent to the spreadsheet with help from the IFTTT program, and recorded on Google Sheets. This is useful in the event of a power outage where someone might be unsure if food in a fridge/freezer has gone bad. This device can also be useful in an environment where the door to a fridge/freezer door is often left open on accident, if the door is accidentally left open for an extended period of time and there is concern if food might have gone bad the temperature can easily be checked to see if the food might have been too warm for too long. If the user of this device is away from home this device is useful because the temperature can be remotely checked to make performance is satisfactory. Someone might want this device if they have kids that accidentally leave the fridge/freezer open for extended periods of time. Another scenario where someone might want this device is if they have a restaurant and want to monitor the freezer to make sure the freezer operation is satisfactory, this could be extra useful due to the fact that there are not always people working at restaurants meaning the status of the freezer cannot always be monitored in person. What makes our device unique is that the photodiode can help detect if the door is open by sensing light shining in as well as the light that turns on when the door is open.

Caleb's data

The spreadsheet of Temperature data can be found here.

The spreadsheet of Light sensor data can be found here.

Walker's Data

light sensor data can be found here

Temp sensor data can be found here

The demonstration video shows a simulation of how our device would be a useful in a real world scenario of someone accidentally leaving the freezer door open. The device is shown in the video to work as expected, the effect of leaving the door open changes the data so the user can see that freezer conditions are not normal.

Code

IOT Project Code

int tempPin = A0;
int extra = A3;
double temperature = 0.0;
double temperatureF = 0.0;
double light = 0.0;
void setup()
{
  Particle.variable("temperature", &temperature, DOUBLE);
  Particle.variable("temperatureF", &temperatureF, DOUBLE);
  Particle.variable("light", &light, DOUBLE);

  pinMode(tempPin, INPUT);
  pinMode(extra, INPUT);
  
}

void loop()
{

  int reading = analogRead(tempPin);

  double voltage = (reading * 3.3) / 4095.0;
  
  temperature = (voltage - 0.5) * 100;

  temperatureF = ((temperature * 9.0) / 5.0) + 32.0;
  
  light = analogRead(extra);
}

Credits

caleb padgett

1 project • 0 followers

Walker Roberts

0 projects • 0 followers

Group 21 MEGR 3171 Temperature sensor IOT Project