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M5SCPContinuity.ino

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+#include <M5StickCPlus.h>
+
+// Define the GPIO pins for continuity testing
+const int outputPin = 26; // GPIO26 as output
+const int inputPin = 36;  // GPIO36 (VP) as input
+
+bool previousContinuity = false;
+
+void setup() {
+    // Initialize M5StickC Plus
+    M5.begin();
+    M5.Lcd.setRotation(3); // Set the display rotation if needed
+    M5.Lcd.fillScreen(TFT_BLACK);
+    M5.Lcd.setTextColor(TFT_WHITE);
+    M5.Lcd.setTextSize(2);
+
+    // Set GPIO modes
+    pinMode(outputPin, OUTPUT);
+    pinMode(inputPin, INPUT_PULLDOWN); // Use internal pull-down resistor
+
+    // Initial state
+    digitalWrite(outputPin, LOW);
+}
+
+void loop() {
+    // Send a signal through the output pin
+    digitalWrite(outputPin, HIGH);
+    delay(10); // Short delay to ensure the signal is stable
+
+    // Read the input pin
+    int continuity = digitalRead(inputPin);
+
+    // Display the result, beep, and flash the screen if continuity is detected
+    M5.Lcd.setCursor(0, 0);
+    if (continuity == HIGH) {
+        if (!previousContinuity) {
+            M5.Lcd.fillScreen(TFT_GREEN); // Flash screen green
+            M5.Lcd.setTextColor(TFT_BLACK, TFT_GREEN); // Set text color to black with green background
+            M5.Lcd.setCursor(20, 30);
+            M5.Lcd.print("Continuity: YES");
+            ledcAttachPin(SPEAKER_PIN, TONE_PIN_CHANNEL);
+            ledcWriteTone(TONE_PIN_CHANNEL, 1000); // Beep at 1000 Hz
+            delay(200); // Keep the screen green and beep for 200 ms
+            ledcWriteTone(TONE_PIN_CHANNEL, 0); // Stop the beep
+            M5.Lcd.fillScreen(TFT_BLACK); // Revert screen to black
+            M5.Lcd.setTextColor(TFT_WHITE); // Set text color back to white
+            previousContinuity = true;
+        }
+    } else {
+        if (previousContinuity) {
+            M5.Lcd.fillScreen(TFT_BLACK);
+            M5.Lcd.setCursor(20, 30);
+            M5.Lcd.print("Continuity: NO");
+            previousContinuity = false;
+        }
+    }
+
+    // Turn off the output signal
+    digitalWrite(outputPin, LOW);
+    delay(500); // Delay between checks to debounce
+}