diff --git a/CARDPUTER Arduino/qrcodei2c.ino b/CARDPUTER Arduino/qrcodei2c.ino
new file mode 100644
index 0000000..c18ee51
--- /dev/null
+++ b/CARDPUTER Arduino/qrcodei2c.ino	
@@ -0,0 +1,70 @@
+/**
+ * @file i2c_mode.ino
+ * @author SeanKwok (shaoxiang@m5stack.com)
+ * @brief Unit QRCode I2C Mode Example
+ * @version 0.1
+ * @date 2024-01-30
+ *
+ *
+ * @Hardwares: M5Core + Unit Synth
+ * @Platform Version: Arduino M5Stack Board Manager v2.1.0
+ * @Dependent Library:
+ * M5Unified: https://github.com/m5stack/M5Unified
+ * M5GFX: https://github.com/m5stack/M5GFX
+ * M5UnitQRCode: https://github.com/m5stack/M5Unit-QRCode
+ */
+#include <M5Unified.h>
+#include <M5GFX.h>
+#include "M5UnitQRCode.h"
+
+M5Canvas canvas(&M5.Display);
+
+M5UnitQRCodeI2C qrcode;
+
+void setup() {
+    M5.begin();
+
+    canvas.setColorDepth(1);  // mono color
+    canvas.createSprite(M5.Display.width(), M5.Display.height());
+    canvas.setTextSize((float)canvas.width() / 160);
+    canvas.setTextScroll(true);
+
+    while (!qrcode.begin(&Wire, UNIT_QRCODE_ADDR, G2, G1, 100000U)) {
+        canvas.println("Unit QRCode I2C Init Fail");
+        Serial.println("Unit QRCode I2C Init Fail");
+        canvas.pushSprite(0, 0);
+        delay(1000);
+    }
+
+    canvas.println("Unit QRCode I2C Init Success");
+    Serial.println("Unit QRCode I2C Init Success");
+    canvas.println("Manual Scan Mode");
+    canvas.pushSprite(0, 0);
+    qrcode.setTriggerMode(MANUAL_SCAN_MODE);
+}
+
+void loop() {
+    if (qrcode.getDecodeReadyStatus() == 1) {
+        uint8_t buffer[512] = {0};
+        uint16_t length     = qrcode.getDecodeLength();
+        Serial.printf("len:%d\r\n", length);
+        qrcode.getDecodeData(buffer, length);
+        Serial.printf("decode data:");
+        for (int i = 0; i < length; i++) {
+            Serial.printf("%c", buffer[i]);
+            canvas.printf("%c", buffer[i]);
+        }
+        Serial.println();
+        canvas.println();
+        canvas.pushSprite(0, 0);
+    }
+    M5.update();
+    if (M5.BtnA.wasPressed()) {
+        // start scan
+        qrcode.setDecodeTrigger(1);
+    }
+    if (M5.BtnB.wasPressed()) {
+        // stop scan
+        qrcode.setDecodeTrigger(0);
+    }
+}
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