Ultrasonic Ruler V3

- Added custom function mode! (Allows you to set a distance minimum and trigger a buzzer if the minimum is not met. It is programmed using the newly added keypad)

- Replaced the red mode button with the 'D' key on the keypad

- Info text bar on the 2nd line has been temporarily removed until I fix the code blocking delays needed for it to operate

by Logan Kessler

Ultrasonic_Ruler.ino

@@ -17,7 +17,8 @@
 //Defines the layout of keypad
 
 String currentInput;
-String currentPassword = "1234";
+String finalInput;
+char key;
 
 const int ROW_NUM = 4; //four rows
 const int COLUMN_NUM = 4; //four columns
@@ -29,23 +30,28 @@ char keys[ROW_NUM][COLUMN_NUM] = {
  {'*','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
+byte pin_rows[ROW_NUM] = {19, 18, 17, 16}; //connect to the row pinouts of the keypad
+byte pin_column[COLUMN_NUM] = {15, 14, 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 buzzer
+const int buzzPin = 8;
 
-//Defines the pin for the mode button
-const int modePin = 8;
-
+//Defines the key for the mode button
+const char modeKey = 'D';
+//Defines the new function key 
+const char newFunctionKey = 'C';
 //Defines the maximium mode integer
-const int maxMode = 2;
+const int maxMode = 3;
 
 //Reference to the mode of the device
 int currentMode;
 
 //References to measured distance booleans
 bool distanceMeasured1;
 bool distanceMeasured2;
+//Reference to custom function program boolean
+bool doNewFunction;
 
 //References to measurements
 int distance1;
@@ -67,6 +73,9 @@ bool buttonPressed;
 //Reference to distance loop
 void distanceLoop();
 
+//Reference to custom function
+void customFunction();
+
 //Reference to resetDistance
 void resetDistance();
 
@@ -79,29 +88,36 @@ int distance; // variable for the distance measurement
 
 void setup() {
  //Sets up all the variables by setting them to a default value
+ doNewFunction = false;
+ currentInput = "EMPTY";
+ finalInput = "EMPTY";
  distance = 0;
  distanceMeasured1 = false;
  distanceMeasured2 = false;
  distance1 = 0;
  distance2 = 0;
  //currentTime = 0;
  //previousTime = 0;
- //passedTime = 0;
+ //passedTime = 0;K
  currentMode = 1;
  pinMode(13, OUTPUT);
- pinMode(modePin, INPUT_PULLUP);
+ pinMode(buzzPin, OUTPUT);
  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");
+ //lcd.begin(16, 2);
+ //lcd.setCursor(0, 2);
+ //lcd.print("Arduino ultrasonic distance sensor");
 }
 void loop() {
+ key = keypad.getKey();
+ if(key != NO_KEY){
+ Serial.println(key);
+ }
  delay(500);
  //currentTime = millis();
  //Cycles through the modes of the ruler
@@ -110,7 +126,7 @@ void loop() {
  }else{
  digitalWrite(13, LOW);
  }
- if(digitalRead(modePin) == LOW && buttonPressed == false){
+ if(key == modeKey && buttonPressed == false){
  if(currentMode < maxMode)
  {
  buttonPressed = true;
@@ -165,9 +181,9 @@ void distanceLoop(){
  abs(distance);
  // Displays the distance on the Serial Monitor
  if(currentMode == 1){
- Serial.print("Distance: ");
- Serial.print(distance);
- Serial.println("cm");
+ //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):
@@ -204,6 +220,8 @@ void distanceLoop(){
  distanceMeasured2 = false; 
  }
  //}
+ }else if(currentMode == 3){
+ customFunction();
  }
 }
 
@@ -212,3 +230,59 @@ void resetDistance(){
  lcd.print(" ");
  lcd.setCursor(0, 0);
 }
+
+void customFunction(){
+if(currentInput == "EMPTY" && finalInput == "EMPTY"){
+ resetDistance();
+ lcd.print("Function Mode");
+}
+
+ if(key == 'C'){
+ doNewFunction = true;
+ finalInput = "EMPTY"; 
+ }
+if(doNewFunction == true && currentInput != "EMPTY"){
+ resetDistance();
+ lcd.print("CI: ");
+ lcd.print(currentInput);
+ lcd.print("CMs");
+}
+Serial.print("doNewFunction: ");
+Serial.println(doNewFunction);
+Serial.print("currentInput: ");
+Serial.println(currentInput);
+Serial.print("finalInput: ");
+Serial.println(finalInput);
+if(key != NO_KEY && key != '#' && key!= '*' && key!= 'A' && key!= 'B' && key!= 'C' && key!= 'D' && doNewFunction == true){
+ if(currentInput == "EMPTY"){
+ currentInput = "";
+ }
+ currentInput += key;
+}else if(key == '#' && doNewFunction == true){
+ finalInput = currentInput;
+ currentInput = "EMPTY";
+ doNewFunction = false;
+}else if(key == '*'){
+ currentInput = "EMPTY";
+}
+
+if(finalInput != "EMPTY"){
+ if(distance < finalInput.toInt()){
+ resetDistance();
+ lcd.print("DBM: ");
+ lcd.print(finalInput.toInt() - distance);
+ lcd.print(" CMs");
+ delay(1500);
+ resetDistance();
+ lcd.print("GET BACK!");
+ digitalWrite(buzzPin, HIGH);
+ }else{
+ resetDistance();
+ //DFM = Distance from minimium
+ lcd.print("DFM: ");
+ lcd.print(distance - finalInput.toInt());
+ lcd.print(" CMs");
+ digitalWrite(buzzPin, LOW);
+ }
+ }
+}