Add projects/ultrasonic-distance-meter/ultrasonic-distance-meter.ino

projects/ultrasonic-distance-meter/ultrasonic-distance-meter.ino

@@ -0,0 +1,56 @@
+#include <Ultrasonic.h>
+#include <Button.h>
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+// Ultrasonic sensor pins
+Ultrasonic ultrasonic(0, 1);
+
+// Button on pin 9 to GND
+Button button(9);
+
+// OLED Pin setup
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+
+Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
+
+void setup() {
+  Serial.begin(9600);
+  button.begin();
+
+  // OLED init
+  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
+    Serial.println(F("SSD1306 allocation failed"));
+    while (true);
+  }
+  oled.clearDisplay();
+  oled.display();
+}
+
+void loop() {
+  if (button.pressed()) {
+    int distance = ultrasonic.read();
+
+    // Convert to string
+    String text = String(distance) + " cm";
+
+    // Choose big font
+    oled.setTextSize(2);  // Adjust size as needed for "big"
+    oled.setTextColor(SSD1306_WHITE);
+
+    // Calculate text bounds for centering
+    int16_t x1, y1;
+    uint16_t w, h;
+    oled.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
+    int x = (SCREEN_WIDTH - w) / 2;
+    int y = (SCREEN_HEIGHT - h) / 2;
+
+    // Display centered text
+    oled.clearDisplay();
+    oled.setCursor(x, y);
+    oled.print(text);
+    oled.display();
+  }
+}