Add distance sensor, Add tests, Add photos

tests/test_dht/test_dht.ino

@@ -0,0 +1,37 @@
+/*
+ * Simple code to test the temperature sensor function and electrical connections.
+*/
+#include <DHT.h>
+
+// Type of DHT sensor used is 11
+#define DHTTYPE DHT11
+#define DHTPIN 2
+
+// Initializes DHT sensor
+DHT dht(DHTPIN, DHTTYPE);
+
+/* ===== SETUP AND LOOP ===== */
+void setup() {
+  // Starts the serial com with PC
+  Serial.begin(9600);
+  Serial.println("Running setup function");
+
+  dht.begin();
+}
+
+void loop() {
+  // Reads temperature as Celsius
+  float temperature = dht.readTemperature();
+
+  // Checks if the read failed and handles the failure
+  if (isnan(temperature)) {
+    Serial.print(F("Failed to read from DHT sensor!"));
+  }
+
+  Serial.print(F("Temperature: "));
+  Serial.print(temperature);
+  Serial.println(F("°C "));
+
+  // Waits a few seconds between measurements.
+  delay(1000);
+}

tests/test_display/test_display.ino

@@ -9,19 +9,19 @@ SevSeg sevseg;
 void setup() {
   byte numDigits = 4;
   byte digitPins[] = {14, 17, 18, 12};
-  byte segmentPins[] = {15, 19, 7, 9, 6, 16, 8};
+  byte segmentPins[] = {15, 19, 7, 8, 9, 16, 6, 13};
   bool resistorsOnSegments = false;
   byte hardwareConfig = COMMON_CATHODE;
   bool updateWithDelays = false;
   bool leadingZeros = false;
-  bool disableDecPoint = true;
+  bool disableDecPoint = false;
 
   sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
     updateWithDelays, leadingZeros, disableDecPoint);
 }
 
 void loop() {
-  sevseg.setNumber(555,0); // Displays '3.141'
+  sevseg.setNumber(567, 1);
   sevseg.refreshDisplay();
-  sevseg.setBrightness(100);
+  sevseg.setBrightness(120);
 }

tests/test_hc_sr04/test_hc_sr04.ino

@@ -0,0 +1,41 @@
+/*
+ * Simple code to test the distance sensor function and electrical connections.
+*/
+int DIST_ECHO_PIN = 10;
+int DIST_TRIG_PIN = 11;
+long duration, cm;
+ 
+void setup() {
+  // Starts the serial com with PC
+  Serial.begin(9600);
+  Serial.println("Running setup function");
+
+  //Defines inputs and outputs
+  pinMode(DIST_TRIG_PIN, OUTPUT);
+  pinMode(DIST_ECHO_PIN, INPUT);
+}
+ 
+void loop() {
+  // The sensor is triggered by a HIGH pulse of 10 or more microseconds.
+  // Gives a short LOW pulse beforehand to ensure a clean HIGH pulse:
+  digitalWrite(DIST_TRIG_PIN, LOW);
+  delayMicroseconds(5);
+  digitalWrite(DIST_TRIG_PIN, HIGH);
+  delayMicroseconds(10);
+  digitalWrite(DIST_TRIG_PIN, LOW);
+ 
+  // Reads the signal from the sensor: a HIGH pulse whose
+  // duration is the time (in microseconds) from the sending
+  // of the ping to the reception of its echo off of an object.
+  //pinMode(DIST_ECHO_PIN, INPUT);
+  duration = pulseIn(DIST_ECHO_PIN, HIGH);
+ 
+  // Converts the time into a distance
+  cm = (duration/2) / 29.1;
+  
+  Serial.print(cm);
+  Serial.print("cm");
+  Serial.println();
+
+  delay(1000);
+}

todoFindCoolNameForProject/todoFindCoolNameForProject.h

@@ -18,6 +18,8 @@
 #define NUMBER_OF_DIGITS 4
 // Pin layout
 #define DHTPIN 2
+#define DIST_ECHO_PIN 10
+#define DIST_TRIG_PIN 11
 #define LOW_TEMP_LED_PIN 3
 #define HIGH_TEMP_LED_PIN 4
 #define RELAY_PIN 5
@@ -28,14 +30,16 @@
 #define SEGMENT_A_PIN 15
 #define SEGMENT_B_PIN 19
 #define SEGMENT_C_PIN 7
-#define SEGMENT_D_PIN 9
-#define SEGMENT_E_PIN 6
+#define SEGMENT_D_PIN 8
+#define SEGMENT_E_PIN 9
 #define SEGMENT_F_PIN 16
-#define SEGMENT_G_PIN 8
+#define SEGMENT_G_PIN 6
 #define DECIMAL_POINT_PIN 13
 // Temperature thresholds
 #define LOW_TEMP 28
 #define HIGH_TEMP 28
+// Distance threshold
+#define DIST_THRESHOLD 10
 
 
 /* ===== GLOBAL VARIABLES AND INITIALIZATIONS ===== */
@@ -46,11 +50,12 @@ SevSeg sevseg;
 int temperatureReadingsCounter;
 float temperatures[BUFFER_SIZE];
 float averageTemp = 0;
-unsigned long displayTimeStart = 0;
+unsigned long lastReading = 0, displayTimeStart = 0;
 
 /* ===== FUNCTION DEFINITIONS ===== */
 void getNewSamples();
 float getNewTemp();
 float calcAverageTempAndReset();
+float getDistance();
 
 #endif //TODO_FIND_COOL_NAME_FOR_PROJECT_H

todoFindCoolNameForProject/todoFindCoolNameForProject.ino

@@ -16,6 +16,9 @@ void setup() {
   pinMode(HIGH_TEMP_LED_PIN, OUTPUT);
   pinMode(RELAY_PIN, OUTPUT);
 
+  pinMode(DIST_TRIG_PIN, OUTPUT);
+  pinMode(DIST_ECHO_PIN, INPUT);
+
   byte numDigits = NUMBER_OF_DIGITS;
   byte digitPins[] = {DIGIT_1_PIN, DIGIT_2_PIN, DIGIT_3_PIN, DIGIT_4_PIN};
   byte segmentPins[] = {SEGMENT_A_PIN, SEGMENT_B_PIN, SEGMENT_C_PIN, SEGMENT_D_PIN, SEGMENT_E_PIN,
@@ -33,24 +36,25 @@ void setup() {
 
 void loop() {
   // Gets new readings
+  if (!lastReading || millis() - lastReading > SLEEP_INTERVAL) {
     getNewSamples();
     Serial.println(temperatureReadingsCounter);
+    lastReading = millis();
+  }
+
+  float distance = getDistance();
 
-  bool getAnotherSample = true;
-  while ((millis() - displayTimeStart) < TEMPERATURE_DISPLAY_DURATION) {
-    // Should display the average temperature for ten seconds
+  if (distance < DIST_THRESHOLD || (millis() - displayTimeStart) < TEMPERATURE_DISPLAY_DURATION) {
+    // Should display the average temperature
     sevseg.setNumber(averageTemp, 1);
     sevseg.refreshDisplay();
-    if ((getAnotherSample && millis() - displayTimeStart) >= (TEMPERATURE_DISPLAY_DURATION/2)){
-      getNewSamples();
-      getAnotherSample = false;
-    }
-  }
-
+  } else {
     sevseg.blank();
     sevseg.refreshDisplay();
+  }
+
   // Waits a few seconds between measurements.
-  delay(SLEEP_INTERVAL);
+  //delay(SLEEP_INTERVAL);
 }
 
 /* ===== FUNCTION IMPLEMENTATIONS ===== */
@@ -126,3 +130,23 @@ float calcAverageTempAndReset() {
 
   return sum/BUFFER_SIZE;
 }
+
+float getDistance() {
+  // The sensor is triggered by a HIGH pulse of 10 or more microseconds.
+  // Gives a short LOW pulse beforehand to ensure a clean HIGH pulse:
+  digitalWrite(DIST_TRIG_PIN, LOW);
+  delayMicroseconds(5);
+  digitalWrite(DIST_TRIG_PIN, HIGH);
+  delayMicroseconds(10);
+  digitalWrite(DIST_TRIG_PIN, LOW);
+ 
+  // Reads the signal from the sensor: a HIGH pulse whose
+  // duration is the time (in microseconds) from the sending
+  // of the ping to the reception of its echo off of an object.
+  pinMode(DIST_ECHO_PIN, INPUT);
+  unsigned long duration = pulseIn(DIST_ECHO_PIN, HIGH);
+
+  // Converts the time into a distance
+  float distance = (duration/2) / 29.1;
+  return distance;
+}