Team IOT Project 29: David Potter, Phil Brown

Published November 25, 2020

The Perfect Shot

A device that informs the user when to stop pouring fluid into a shot glass in order to obtain the "perfect shot".

BeginnerFull instructions provided388

Things used in this project

Hardware components

Particle Argon

LED, RGB

Digital Load Cell Weight Sensor HX711 AD Converter Breakout Module 5kg

LCD 1602 Module

Jumper wires (generic)

Resistor 220 ohm

Resistor 4.75k ohm

Software apps and online services

Particle Build Web IDE

ThingSpeak API

Story

This is a device that informs the user when to stop pouring fluid into a shot glass in order to get the standard ounce and a half shot. To do this, a load cell is used to measure the weight of the liquid going into the shot glass in grams. The first Particle Argon then converts grams to fluid ounces using density. This information is then sent to the second Particle Argon. The second Argon displays this information on a LCD screen. The second Particle Argon then sends a signal back to the first Argon to change the color of the RGB LED light from GREEN (Low) to BLUE (Just Right). The light then changes to RED if the shot is over-poured.

The following YouTube video will demonstrate the product.

The Perfect Shot Demo

As you can see, the device works properly and is very accurate. There are two main things that could improve the product which are; reducing the lag time, and water-proofing. Reducing the lag time could be done by creating a product with only one Argon that controls the circuit, measures, and display the weight. This would reduce the lag time because the data does not have to be sent over the internet. Water-proofing is essential for this product because fluids will be poured all around the electronic components and, if spilled, the device could malfunction. This could be done by enclosing all the electrical components to where only the display screen, the top load cell platform, and the LED light are visible.

This product could be useful for bars as a way to ensure customers that they are getting the amount of liquor that they paid for. It could also be used at home for people who need to measure out fluid when cooking. There are a number of uses for this product; however, the original intention is to assist the user in pouring the perfect shot.

A live graph can be accessed HERE.

The below image shows how the load cell is wired to the first Argon.

These show how the first Argon is wired including the RGB LED wiring.

This image shows the second Argon and the LCD screen.

Code

// This #include statement was automatically added by the Particle IDE.
#include <HX711.h>

#define DOUT  0
#define CLK  2
HX711 scale(DOUT, CLK);
float temperature;

void LED(const char *event, const char *data)
{
    String pew = data;
    temperature = pew.toFloat();
}
 float calibration_factor = 535; // this calibration factor is adjusted according to my load cell
float units;
float units1;

void setup() {
    int ledB=D6;
    int ledG=D7;
    int ledR=D8;

pinMode(ledB,OUTPUT);
pinMode(ledG,OUTPUT);
pinMode(ledR,OUTPUT);


 Serial.begin(9600);  
 Serial.println("Press T to tare");
scale.set_scale(calibration_factor); //Adjust to this calibration factor
 scale.tare(); 
}



void loop() {
units = scale.get_units(), 5;
 if (units < 0)
 {
   units = 0.00;
 }

 units1 = (units/29.57);
 
 
    Particle.publish("Ounces", String(units1),PUBLIC);  //subscribe to this mouse event.
    delay(1000);  //delay to prevent overloading the cloud communication.
   Particle.subscribe("LED_David",LED);
   if (temperature<1.1) {
            digitalWrite(D6,HIGH);
            digitalWrite(D7,LOW);
       digitalWrite(D8,LOW);
   }
 else if (temperature<2.1){
  digitalWrite(D6,LOW);
       digitalWrite(D7,HIGH);
            digitalWrite(D8,LOW);
  }
  else {
           digitalWrite(D6,LOW);
                digitalWrite(D7,LOW);
      digitalWrite(D8,HIGH);
  }


 
 if(Serial.available())
 {
   char temp = Serial.read();
   if(temp == 't' || temp == 'T')
     scale.tare();  //Reset the scale to zero      
 }
}

// This #include statement was automatically added by the Particle IDE.
#include <LiquidCrystal.h>


LiquidCrystal lcd(6, 1, 5, 4, 3, 7);


float temperature;
void temper(const char *event, const char *data )
{
    String pew = data;
    temperature = pew.toFloat();
}


void setup() {
        Particle.subscribe("Ounces", temper);
  // set up the LCD's number of columns and rows: 
  lcd.begin(16,2);
  Serial.begin(9600);
    lcd.print("Ounces:");
}


void loop(){
  // Print a message to the LCD.

  delay(1000);
  lcd.setCursor(8,0);
  lcd.print(temperature);
  
  if (temperature<1.49) {
      Particle.publish("LED_David",String(1),PUBLIC);
  }
  else if (temperature<1.59) {
    Particle.publish("LED_David",String(2),PUBLIC); }
else {
      Particle.publish("LED_David",String(3),PUBLIC);
}

}

Credits

David Potter

1 project • 0 followers

Phil Brown

1 project • 0 followers

The Perfect Shot

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Wiring Diagram for the LCD display circuit.

Wiring Diagram for the load cell circuit

Code

The code for the first Argon, i.e. the one with the load cell sensor and RGB LED is shown below.

The code for the second Argon, i.e. the one with the LCD display is shown below.

Credits

David Potter

Phil Brown

Comments

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The Perfect Shot

The Perfect Shot

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Wiring Diagram for the LCD display circuit.

Wiring Diagram for the load cell circuit

Code

The code for the first Argon, i.e. the one with the load cell sensor and RGB LED is shown below.

The code for the second Argon, i.e. the one with the LCD display is shown below.

Credits

David Potter

Phil Brown

Comments

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