•

Madison Richards

Published November 17, 2021

Splish Splash - I Was Taking A Bath

A way to provide safe and reliable bath water temperature readings to bathe your child or pet in.

IntermediateShowcase (no instructions)74

Things used in this project

Hardware components

Particle Argon

Adafruit 10K Precision Epoxy Thermistor

Resistor 10k ohm

Through Hole Resistor, 47 ohm

3 mm LED: Red

3 mm LED: Green

3 mm LED: Yellow

Jumper wires (generic)

Software apps and online services

Particle Build Web IDE

ThingSpeak API

Story

Project Description

Our set of Particle Argons are designed to notify someone when the correct bath water temperature has been met to bathe their small child or pet. The Mayo Clinic suggests bathing small children in water that is 100° F or 37.78° C. This water temperature allows the room to be comfortably warm. Pets are also recommended to be bathed in lukewarm water, which is also 100° F or 37.78° C. This product will allow parents to feel safe putting their small children and pets in the water and allows them the freedom of leaving the bathroom without the fear of hurting their loved ones. This solution gives parents real and updated temperature readings constantly, giving them the most updated values to help keep their children safe.

How it works

The first particle argon has a thermistor programmed to it and it takes a temperature measurement and sends it to the particle cloud. The second particle argon takes this measurement and depending on the value, lights up the correlated LED (yellow, green, red). If the second argon receives this data, it sends a message to the cloud back to the first particle argon and it lights up the built-in D7 LED. Our specific particle argon has slightly higher values than the prescribed values from the Mayo Clinic but that is most likely due to our circuit and the inference from resistors increasing the value.

Flow Chart of Communications

Pictures of Sensors

1 / 2 • LED Sensor

1 / 3 • Green Sensor indicates the water temperature is good

Project Demonstration

ThingSpeak Graph

The thingspeak graph when running bath water (Values are in C)

Code

float V=1;
int led1;
void setup() {
    pinMode(D6, OUTPUT);
    pinMode(D5, OUTPUT);
    pinMode(D4, OUTPUT);
    Particle.subscribe ("Temperature_Sensor", Light);
}
 // Turns on the lights depending on the temperature range
void Light(const char *event, String data) {
    led1=data.toInt();
    if (led1<=40){
        digitalWrite(D6, HIGH);
        digitalWrite(D5, LOW);
        digitalWrite(D4, LOW);
    }
    else if (led1>=40 && led1<= 50){
        digitalWrite(D5, HIGH);
        digitalWrite(D4, LOW);
        digitalWrite(D6, LOW);  
    
    }
    else if (led1 >= 50){
        digitalWrite(D4, HIGH);
        digitalWrite(D5, LOW);
        digitalWrite(D6, LOW);   
    }
    else {
        digitalWrite(D6, LOW);
        digitalWrite(D5, LOW);
        digitalWrite(D4, LOW);
    }
    String connect = String(V);
Particle.publish("LED_Sensor");

#include <math.h>

int ThermistorPin = A5;
int Vo;
double R1 = 9970;
double logR, R2, T, Tc;
double c1 = 0.001129148, c2 = 0.000234125, c3= 0.0000000876741; 

void setup() {
   pinMode(D7, OUTPUT);
    Particle.subscribe ("LED_Sensor", Lightaccr);
    pinMode (ThermistorPin, INPUT);
}

void loop() {
  // Gets data from the Thermistor and converts it into usable temperature data
  Vo = analogRead(ThermistorPin);
  R2 = R1/(4096.0/((double)Vo-1));
  logR = log(R2);
  T = (1.0 / (c1 + (c2 * logR) + c3 *( logR * logR * logR)));
  Tc = T - 273.15; 
  // Sends the data to the other argon
  Particle.publish("Temperature_Sensor", String(Tc));
  //Sends the data to the live graph
  Particle.publish("temp", String(Tc), PRIVATE);
  // Wait 15 seconds
  delay(15000);
}
 // Acknowledgement that the data was received by the other Argon
void Lightaccr(const char *eventName, const char *data)
{ 
    digitalWrite(D7, HIGH);
 }

Credits

Katelyn Fennell

1 project • 0 followers

Contact

Splish Splash - I Was Taking A Bath

Things used in this project

Hardware components

Software apps and online services

Story

Project Description

Flow Chart of Communications

Pictures of Sensors

Project Demonstration

ThingSpeak Graph

Schematics

Temperature Sensor Circuit Diagram

LED Sensor Circuit Diagram

Code

LED Sensor Code

Temperature Code

Credits

Katelyn Fennell

Madison Richards

Comments

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Splish Splash - I Was Taking A Bath

Splish Splash - I Was Taking A Bath

Things used in this project

Hardware components

Software apps and online services

Story

Project Description

Flow Chart of Communications

Pictures of Sensors

Project Demonstration

ThingSpeak Graph

Schematics

Temperature Sensor Circuit Diagram

LED Sensor Circuit Diagram

Code

LED Sensor Code

Temperature Code

Credits

Katelyn Fennell

Madison Richards

Comments

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