Ultra Sonic Ruler V2.1

First commit for this project!

Ultrasonic_Ruler.ino

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+
+// ---------------------------------------------------------------- //
+// Arduino Ultrasoninc Sensor HC-SR04
+// Re-writed by Arbi Abdul Jabbaar
+// Using Arduino IDE 1.8.7
+// Using HC-SR04 Module
+// Tested on 17 September 2019
+// ---------------------------------------------------------------- //
+//Include LCD and Keypad library
+#include <LiquidCrystal.h>
+#include <Keypad.h>
+
+
+#define echoPin 10 // attach pin D2 Arduino to pin Echo of HC-SR04
+#define trigPin 9 //attach pin D3 Arduino to pin Trig of HC-SR04
+
+//Defines the layout of keypad
+
+String currentInput;
+String currentPassword = "1234";
+
+const int ROW_NUM = 4; //four rows
+const int COLUMN_NUM = 4; //four columns
+
+char keys[ROW_NUM][COLUMN_NUM] = {
+ {'1','2','3', 'A'},
+ {'4','5','6', 'B'},
+ {'7','8','9', 'C'},
+ {'*','0','#', 'D'}
+};
+
+byte pin_rows[ROW_NUM] = {A5, A4, A3, A2}; //connect to the row pinouts of the keypad
+byte pin_column[COLUMN_NUM] = {A1, A0, 6, 7}; //connect to the column pinouts of the keypad
+
+Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );
+
+//Defines the pin for the mode button
+const int modePin = 8;
+
+//Defines the maximium mode integer
+const int maxMode = 2;
+
+//Reference to the mode of the device
+int currentMode;
+
+//References to measured distance booleans
+bool distanceMeasured1;
+bool distanceMeasured2;
+
+//References to measurements
+int distance1;
+int distance2;
+
+//References to timer counts for future use once I replace delays
+//unsigned long currentTime; 
+//unsigned long previousTime;
+//unsigned long passedTime;
+
+//References to distances per timeframe
+int distancePerSecond;
+int distancePerMinute;
+int distancePerHour;
+
+//Reference to button pressed boolean 
+bool buttonPressed;
+
+//Reference to distance loop
+void distanceLoop();
+
+//Reference to resetDistance
+void resetDistance();
+
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
+
+// defines variables
+long duration; // variable for the duration of sound wave travel
+int distance; // variable for the distance measurement
+
+void setup() {
+ //Sets up all the variables by setting them to a default value
+ distance = 0;
+ distanceMeasured1 = false;
+ distanceMeasured2 = false;
+ distance1 = 0;
+ distance2 = 0;
+ //currentTime = 0;
+ //previousTime = 0;
+ //passedTime = 0;
+ currentMode = 1;
+ pinMode(13, OUTPUT);
+ pinMode(modePin, INPUT_PULLUP);
+ pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
+ pinMode(echoPin, INPUT); // Sets the echoPin as an INPUT
+ 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 up the LCD's number of columns and rows: 
+ lcd.begin(16, 2);
+ lcd.setCursor(0, 2);
+ lcd.print("Arduino ultrasonic distance sensor");
+}
+void loop() {
+ delay(500);
+ //currentTime = millis();
+ //Cycles through the modes of the ruler
+ if(buttonPressed){
+ digitalWrite(13, HIGH);
+ }else{
+ digitalWrite(13, LOW);
+ }
+ if(digitalRead(modePin) == LOW && buttonPressed == false){
+ if(currentMode < maxMode)
+ {
+ buttonPressed = true;
+ currentMode++;
+ }else
+ {
+ currentMode = 1; 
+ }
+ }else
+ {
+ buttonPressed = false;
+ }
+
+ //Print fun messages to 2nd line of LCD
+
+ //lcd.setCursor(0, 2);
+ //lcd.print("Ultrasonic Ruler");
+ //delay(625);
+ distanceLoop();
+ //delay(625);
+ //lcd.setCursor(0,2);
+ //lcd.print("by Logan Kessler");
+ //delay(625);
+ //distanceLoop();
+ //delay(625);
+ //lcd.setCursor(0, 2);
+ //lcd.print("#Team Metric! ");
+ //delay(500);
+ //distanceLoop();
+ //delay(500);
+ //lcd.setCursor(0, 2);
+ //lcd.print("Made 8/18/2020 ");
+ //waits a second before looping program
+ //delay(500);
+ //distanceLoop();
+ //delay(500); 
+}
+
+void distanceLoop(){
+
+// Clears the trigPin condition
+ digitalWrite(trigPin, LOW);
+ delayMicroseconds(2);
+ // Sets the trigPin HIGH (ACTIVE) for 10 microseconds
+ digitalWrite(trigPin, HIGH);
+ delayMicroseconds(10);
+ digitalWrite(trigPin, LOW);
+ // Reads the echoPin, returns the sound wave travel time in microseconds
+ duration = pulseIn(echoPin, HIGH);
+ // Calculating the distance
+ distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)
+ abs(distance);
+ // Displays the distance on the Serial Monitor
+ if(currentMode == 1){
+ Serial.print("Distance: ");
+ Serial.print(distance);
+ Serial.println("cm");
+
+ // set the cursor to column 0, line 1
+ // (note: line 1 is the second row, since counting begins with 0):
+ //Resets cursor
+ resetDistance();
+ //Print distance to first line of LCD
+ lcd.print("Distance: ");
+ lcd.print(distance);
+ lcd.print("cm");
+}else if(currentMode == 2)
+{
+ //Not currently needed due to the way I setup delays, may be useful in the future
+ //lcd.setCursor(0, 0);
+ //passedTime = currentTime - previousTime;
+ //if(passedTime >= 500){
+ //previousTime = currentTime;
+ //passedTime = 0;
+ if(distanceMeasured1 == false){
+ distance1 = distance;
+ distanceMeasured1 = true;
+ }else if(distanceMeasured2 == false){
+ distance2 = distance;
+ distanceMeasured2 = true;
+ }else if(distanceMeasured1 && distanceMeasured2){
+ distancePerSecond = distance2 - distance1;
+ //distancePerMinute = distance2 - distance1 * 60;
+ //distancePerHour = distance2 - distance1 * 3600;
+
+ resetDistance();
+
+ lcd.print("DPS: "); lcd.print(abs(distancePerSecond)); lcd.print("cm "); //lcd.print("DPM: "); lcd.print(distancePerMinute); lcd.print("cm "); lcd.print("DPH: "); lcd.print(distancePerHour); lcd.print("cm");
+
+ distanceMeasured1 = false;
+ distanceMeasured2 = false; 
+ }
+ //}
+ }
+}
+
+void resetDistance(){
+ lcd.setCursor(0, 0);
+ lcd.print(" ");
+ lcd.setCursor(0, 0);
+}