Temperature and Distance reading with active LED

This project monitors the Temperature, and distance. The LED is an indictor that the robot stop at a distance 10cm or less.

Sep 10, 2021

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temperature

led

distance

Components and supplies

Arduino Mega 2560 Rev3

LCD 16x2 + extras - White on Blue

Thermistor

Resistor 10k ohm

Jumper wires (generic)

Ultrasonic Sensor - HC-SR04 (Generic)

Resistor 220 ohm

5 mm LED: Red

Single Turn Potentiometer- 100k ohms

Project description

Code

Temperature and Distance Monitoring

arduino

1/*
2 Temperature and Distance Monitoring
3  Measures the distance   and temperature every 30 secs, and turn on the red LED when the distance is  less   than 10 cm.
4  You will need to download the NewPing and Liquid Crystal libary   from libary manager. 
5 */ 
6// Unltra Sonice test
7#include <NewPing.h> //Libary   used for the ultra sonic
8#include <LiquidCrystal.h> //Libary used for the LCD   screen
9//Define Constants
10#define echoPin 4 // attach pin D4 Arduino to pin   Echo of HC-SR04
11#define trigPin 3 // attach pin D3 Arduino to pin Trigger of   HC-SR04
12#define Max_DISTANCE 400 // Set the max distance for the Ultra sonic   
13#define ledPin 2 // LED pin D2 
14NewPing sonar(trigPin,echoPin, Max_DISTANCE);
15
16//Define   Variables, Variables will change as the program is ran:
17float duration, distance;
18int   iterations = 10;
19int tempPin = 0;
20int ledState = LOW;             // ledState   used to set the LED at the start of the program
21//                BS  E  D4 D5   D6 D7
22LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // Pins for the LCD screen. These   can be changed
23
24void setup()
25{
26  //Set Pins and serial port printout
27   Serial.begin(9600);    //  Serial Communication is starting with 9600 of baudrate   speed
28  Serial.println("Ultrasonic Sensor HC-SR04 Test"); // print some text   in Serial Monitor
29  Serial.println("with Arduino UNO R3");
30  // Set the   row and columns for the LCD screen
31   lcd.begin(16, 1);  // Set column for distance   display
32   lcd.begin(16, 2);   // Set column for Temp display
33
34  // set   the digital pin as output:
35  pinMode(ledPin, OUTPUT);
36}
37
38// Main Program   Loop this will run until program is halted
39void loop()
40{
41  //Begin Ultra   Sonic Code and print to LCD screen
42duration = sonar.ping_median(iterations);
43distance   = (duration / 2) * 0.0343;
44  
45// Displays the Output
46  lcd.setCursor(0,   1); // set the column on the LCD
47  lcd.print ("Dist:      cm"); // Displays   the distance on the LCD
48  
49  /* Checks that the distance is greater than or   equal to 400 cm,
50  or if the distance is less than or equal to 5 cm
51  */
52     if (distance>= 400 || distance<= 5) { 
53  lcd.setCursor(0, 1);
54  lcd.print("Out   of range");  // Displays the out of range on the LCD
55  }
56  else {
57  lcd.setCursor(5,   1); // set the column on the LCD
58  lcd.print (distance); // Displays the distance   on the LCD
59  }
60// Serial monitor display this is mainly for debugging 
61   Serial.print(" Duration: ");  // Displays the distance on the Serial Monitor   
62  Serial.print(duration);  // Displays the distance on the Serial Monitor 
63   Serial.print(" Dist: ");  // Displays the distance on the Serial Monitor 
64   Serial.print(distance); // Displays the distance on the Serial Monitor 
65  Serial.println("   cm"); // Displays the distance on the Serial Monitor 
66  
67  // TEMP monitoring   code
68  int tempReading = analogRead(tempPin);
69  // Temp conversion formula
70   double tempK = log(10000.0 * ((1024.0 / tempReading - 1)));
71  tempK = 1 / (0.001129148   + (0.000234125 + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
72   float tempC = tempK - 273.15;            // Convert Kelvin to Celcius
73  float   tempF = (tempC * 9.0) / 5.0 + 32.0; // Convert Celcius to Fahrenheit
74  /*  replaced
75     float tempVolts = tempReading * 5.0 / 1024.0;
76    float tempC = (tempVolts   - 0.5) * 10.0;
77    float tempF = tempC * 9.0 / 5.0 + 32.0;
78  */
79  // Display   Temperature in C or F
80  lcd.setCursor(0, 0);
81  //lcd.print("Temp         C   ");
82  // Display Temperature in F
83  lcd.print("Temp         F  ");
84   lcd.setCursor(6, 0);
85  // Display Temperature in C
86  //lcd.print(tempC);
87   // Display Temperature in F
88  lcd.print(tempF); // prints temperature to LCD   screen
89   delay(30000);
90
91  //  the LED is off turn if the distance is greater   than 10cm
92  if (distance<= 10) { // Checks the distance
93    ledState = HIGH;   //Set LED to on if less than 10 cm
94  } else {
95    ledState = LOW; //Set LED   to off
96  }
97
98  // set the LED with the ledState of the variable:
99  digitalWrite(ledPin,   ledState);
100}

/*
 Temperature and Distance Monitoring
  Measures the distance   and temperature every 30 secs, and turn on the red LED when the distance is  less   than 10 cm.
  You will need to download the NewPing and Liquid Crystal libary   from libary manager. 
 */ 
// Unltra Sonice test
#include <NewPing.h> //Libary   used for the ultra sonic
#include <LiquidCrystal.h> //Libary used for the LCD   screen
//Define Constants
#define echoPin 4 // attach pin D4 Arduino to pin   Echo of HC-SR04
#define trigPin 3 // attach pin D3 Arduino to pin Trigger of   HC-SR04
#define Max_DISTANCE 400 // Set the max distance for the Ultra sonic   
#define ledPin 2 // LED pin D2 
NewPing sonar(trigPin,echoPin, Max_DISTANCE);

//Define   Variables, Variables will change as the program is ran:
float duration, distance;
int   iterations = 10;
int tempPin = 0;
int ledState = LOW;             // ledState   used to set the LED at the start of the program
//                BS  E  D4 D5   D6 D7
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // Pins for the LCD screen. These   can be changed

void setup()
{
  //Set Pins and serial port printout
   Serial.begin(9600);    //  Serial Communication is starting with 9600 of baudrate   speed
  Serial.println("Ultrasonic Sensor HC-SR04 Test"); // print some text   in Serial Monitor
  Serial.println("with Arduino UNO R3");
  // Set the   row and columns for the LCD screen
   lcd.begin(16, 1);  // Set column for distance   display
   lcd.begin(16, 2);   // Set column for Temp display

  // set   the digital pin as output:
  pinMode(ledPin, OUTPUT);
}

// Main Program   Loop this will run until program is halted
void loop()
{
  //Begin Ultra   Sonic Code and print to LCD screen
duration = sonar.ping_median(iterations);
distance   = (duration / 2) * 0.0343;
  
// Displays the Output
  lcd.setCursor(0,   1); // set the column on the LCD
  lcd.print ("Dist:      cm"); // Displays   the distance on the LCD
  
  /* Checks that the distance is greater than or   equal to 400 cm,
  or if the distance is less than or equal to 5 cm
  */
     if (distance>= 400 || distance<= 5) { 
  lcd.setCursor(0, 1);
  lcd.print("Out   of range");  // Displays the out of range on the LCD
  }
  else {
  lcd.setCursor(5,   1); // set the column on the LCD
  lcd.print (distance); // Displays the distance   on the LCD
  }
// Serial monitor display this is mainly for debugging 
   Serial.print(" Duration: ");  // Displays the distance on the Serial Monitor   
  Serial.print(duration);  // Displays the distance on the Serial Monitor 
   Serial.print(" Dist: ");  // Displays the distance on the Serial Monitor 
   Serial.print(distance); // Displays the distance on the Serial Monitor 
  Serial.println("   cm"); // Displays the distance on the Serial Monitor 
  
  // TEMP monitoring   code
  int tempReading = analogRead(tempPin);
  // Temp conversion formula
   double tempK = log(10000.0 * ((1024.0 / tempReading - 1)));
  tempK = 1 / (0.001129148   + (0.000234125 + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
   float tempC = tempK - 273.15;            // Convert Kelvin to Celcius
  float   tempF = (tempC * 9.0) / 5.0 + 32.0; // Convert Celcius to Fahrenheit
  /*  replaced
     float tempVolts = tempReading * 5.0 / 1024.0;
    float tempC = (tempVolts   - 0.5) * 10.0;
    float tempF = tempC * 9.0 / 5.0 + 32.0;
  */
  // Display   Temperature in C or F
  lcd.setCursor(0, 0);
  //lcd.print("Temp         C   ");
  // Display Temperature in F
  lcd.print("Temp         F  ");
   lcd.setCursor(6, 0);
  // Display Temperature in C
  //lcd.print(tempC);
   // Display Temperature in F
  lcd.print(tempF); // prints temperature to LCD   screen
   delay(30000);

  //  the LED is off turn if the distance is greater   than 10cm
  if (distance<= 10) { // Checks the distance
    ledState = HIGH;   //Set LED to on if less than 10 cm
  } else {
    ledState = LOW; //Set LED   to off
  }

  // set the LED with the ledState of the variable:
  digitalWrite(ledPin,   ledState);
}

Temperature and Distance Monitoring

arduino

1/*
2 Temperature and Distance Monitoring
3  Measures the distance  and temperature every 30 secs, and turn on the red LED when the distance is  less  than 10 cm.
4  You will need to download the NewPing and Liquid Crystal libary  from libary manager. 
5 */ 
6// Unltra Sonice test
7#include <NewPing.h> //Libary  used for the ultra sonic
8#include <LiquidCrystal.h> //Libary used for the LCD  screen
9//Define Constants
10#define echoPin 4 // attach pin D4 Arduino to pin  Echo of HC-SR04
11#define trigPin 3 // attach pin D3 Arduino to pin Trigger of  HC-SR04
12#define Max_DISTANCE 400 // Set the max distance for the Ultra sonic  
13#define ledPin 2 // LED pin D2 
14NewPing sonar(trigPin,echoPin, Max_DISTANCE);
15
16//Define  Variables, Variables will change as the program is ran:
17float duration, distance;
18int  iterations = 10;
19int tempPin = 0;
20int ledState = LOW;             // ledState  used to set the LED at the start of the program
21//                BS  E  D4 D5  D6 D7
22LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // Pins for the LCD screen. These  can be changed
23
24void setup()
25{
26  //Set Pins and serial port printout
27  Serial.begin(9600);    //  Serial Communication is starting with 9600 of baudrate  speed
28  Serial.println("Ultrasonic Sensor HC-SR04 Test"); // print some text  in Serial Monitor
29  Serial.println("with Arduino UNO R3");
30  // Set the  row and columns for the LCD screen
31   lcd.begin(16, 1);  // Set column for distance  display
32   lcd.begin(16, 2);   // Set column for Temp display
33
34  // set  the digital pin as output:
35  pinMode(ledPin, OUTPUT);
36}
37
38// Main Program  Loop this will run until program is halted
39void loop()
40{
41  //Begin Ultra  Sonic Code and print to LCD screen
42duration = sonar.ping_median(iterations);
43distance  = (duration / 2) * 0.0343;
44  
45// Displays the Output
46  lcd.setCursor(0,  1); // set the column on the LCD
47  lcd.print ("Dist:      cm"); // Displays  the distance on the LCD
48  
49  /* Checks that the distance is greater than or  equal to 400 cm,
50  or if the distance is less than or equal to 5 cm
51  */
52    if (distance>= 400 || distance<= 5) { 
53  lcd.setCursor(0, 1);
54  lcd.print("Out  of range");  // Displays the out of range on the LCD
55  }
56  else {
57  lcd.setCursor(5,  1); // set the column on the LCD
58  lcd.print (distance); // Displays the distance  on the LCD
59  }
60// Serial monitor display this is mainly for debugging 
61  Serial.print(" Duration: ");  // Displays the distance on the Serial Monitor  
62  Serial.print(duration);  // Displays the distance on the Serial Monitor 
63  Serial.print(" Dist: ");  // Displays the distance on the Serial Monitor 
64  Serial.print(distance); // Displays the distance on the Serial Monitor 
65  Serial.println("  cm"); // Displays the distance on the Serial Monitor 
66  
67  // TEMP monitoring  code
68  int tempReading = analogRead(tempPin);
69  // Temp conversion formula
70  double tempK = log(10000.0 * ((1024.0 / tempReading - 1)));
71  tempK = 1 / (0.001129148  + (0.000234125 + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
72  float tempC = tempK - 273.15;            // Convert Kelvin to Celcius
73  float  tempF = (tempC * 9.0) / 5.0 + 32.0; // Convert Celcius to Fahrenheit
74  /*  replaced
75    float tempVolts = tempReading * 5.0 / 1024.0;
76    float tempC = (tempVolts  - 0.5) * 10.0;
77    float tempF = tempC * 9.0 / 5.0 + 32.0;
78  */
79  // Display  Temperature in C or F
80  lcd.setCursor(0, 0);
81  //lcd.print("Temp         C  ");
82  // Display Temperature in F
83  lcd.print("Temp         F  ");
84  lcd.setCursor(6, 0);
85  // Display Temperature in C
86  //lcd.print(tempC);
87  // Display Temperature in F
88  lcd.print(tempF); // prints temperature to LCD  screen
89   delay(30000);
90
91  //  the LED is off turn if the distance is greater  than 10cm
92  if (distance<= 10) { // Checks the distance
93    ledState = HIGH;  //Set LED to on if less than 10 cm
94  } else {
95    ledState = LOW; //Set LED  to off
96  }
97
98  // set the LED with the ledState of the variable:
99  digitalWrite(ledPin,  ledState);
100}

/*
 Temperature and Distance Monitoring
  Measures the distance  and temperature every 30 secs, and turn on the red LED when the distance is  less  than 10 cm.
  You will need to download the NewPing and Liquid Crystal libary  from libary manager. 
 */ 
// Unltra Sonice test
#include <NewPing.h> //Libary  used for the ultra sonic
#include <LiquidCrystal.h> //Libary used for the LCD  screen
//Define Constants
#define echoPin 4 // attach pin D4 Arduino to pin  Echo of HC-SR04
#define trigPin 3 // attach pin D3 Arduino to pin Trigger of  HC-SR04
#define Max_DISTANCE 400 // Set the max distance for the Ultra sonic  
#define ledPin 2 // LED pin D2 
NewPing sonar(trigPin,echoPin, Max_DISTANCE);

//Define  Variables, Variables will change as the program is ran:
float duration, distance;
int  iterations = 10;
int tempPin = 0;
int ledState = LOW;             // ledState  used to set the LED at the start of the program
//                BS  E  D4 D5  D6 D7
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // Pins for the LCD screen. These  can be changed

void setup()
{
  //Set Pins and serial port printout
  Serial.begin(9600);    //  Serial Communication is starting with 9600 of baudrate  speed
  Serial.println("Ultrasonic Sensor HC-SR04 Test"); // print some text  in Serial Monitor
  Serial.println("with Arduino UNO R3");
  // Set the  row and columns for the LCD screen
   lcd.begin(16, 1);  // Set column for distance  display
   lcd.begin(16, 2);   // Set column for Temp display

  // set  the digital pin as output:
  pinMode(ledPin, OUTPUT);
}

// Main Program  Loop this will run until program is halted
void loop()
{
  //Begin Ultra  Sonic Code and print to LCD screen
duration = sonar.ping_median(iterations);
distance  = (duration / 2) * 0.0343;
  
// Displays the Output
  lcd.setCursor(0,  1); // set the column on the LCD
  lcd.print ("Dist:      cm"); // Displays  the distance on the LCD
  
  /* Checks that the distance is greater than or  equal to 400 cm,
  or if the distance is less than or equal to 5 cm
  */
    if (distance>= 400 || distance<= 5) { 
  lcd.setCursor(0, 1);
  lcd.print("Out  of range");  // Displays the out of range on the LCD
  }
  else {
  lcd.setCursor(5,  1); // set the column on the LCD
  lcd.print (distance); // Displays the distance  on the LCD
  }
// Serial monitor display this is mainly for debugging 
  Serial.print(" Duration: ");  // Displays the distance on the Serial Monitor  
  Serial.print(duration);  // Displays the distance on the Serial Monitor 
  Serial.print(" Dist: ");  // Displays the distance on the Serial Monitor 
  Serial.print(distance); // Displays the distance on the Serial Monitor 
  Serial.println("  cm"); // Displays the distance on the Serial Monitor 
  
  // TEMP monitoring  code
  int tempReading = analogRead(tempPin);
  // Temp conversion formula
  double tempK = log(10000.0 * ((1024.0 / tempReading - 1)));
  tempK = 1 / (0.001129148  + (0.000234125 + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
  float tempC = tempK - 273.15;            // Convert Kelvin to Celcius
  float  tempF = (tempC * 9.0) / 5.0 + 32.0; // Convert Celcius to Fahrenheit
  /*  replaced
    float tempVolts = tempReading * 5.0 / 1024.0;
    float tempC = (tempVolts  - 0.5) * 10.0;
    float tempF = tempC * 9.0 / 5.0 + 32.0;
  */
  // Display  Temperature in C or F
  lcd.setCursor(0, 0);
  //lcd.print("Temp         C  ");
  // Display Temperature in F
  lcd.print("Temp         F  ");
  lcd.setCursor(6, 0);
  // Display Temperature in C
  //lcd.print(tempC);
  // Display Temperature in F
  lcd.print(tempF); // prints temperature to LCD  screen
   delay(30000);

  //  the LED is off turn if the distance is greater  than 10cm
  if (distance<= 10) { // Checks the distance
    ledState = HIGH;  //Set LED to on if less than 10 cm
  } else {
    ledState = LOW; //Set LED  to off
  }

  // set the LED with the ledState of the variable:
  digitalWrite(ledPin,  ledState);
}

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