diff --git a/README.md b/README.md
index 775f699..7b4b56c 100644
--- a/README.md
+++ b/README.md
@@ -22,18 +22,34 @@ FILE uart = FDEV_SETUP_STREAM(usart, NULL, _FDEV_SETUP_WRITE);
 void i2c_example_task(void *pvParameters)
 {
 	zh_avr_i2c_master_init(false);
-	avr_err_t err = zh_avr_i2c_master_probe(0x38, 100 / portTICK_PERIOD_MS);
-	switch (err)
+	for (;;)
 	{
-	case AVR_OK:
-		printf("Slave Answered.\n");
-		break;
-	case AVR_ERR_INVALID_RESPONSE:
-		printf("Slave Not Answer.\n");
-		break;
-	default:
-		printf("Bus Error.\n");
-		break;
+		avr_err_t err = zh_avr_i2c_master_probe(0x38, 100 / portTICK_PERIOD_MS);
+		if (err == AVR_OK)
+		{
+			uint8_t data_send = 111;
+			uint8_t data_read = 0;
+			printf("Data Send %d.\n", data_send);
+			zh_avr_i2c_master_transmit(0x38, (uint8_t *)&data_send, sizeof(data_send), 100 / portTICK_PERIOD_MS);
+			zh_avr_i2c_master_receive(0x38, (uint8_t *)&data_read, sizeof(data_read), 100 / portTICK_PERIOD_MS);
+			printf("Data Read %d.\n", data_read);
+			data_send = 55;
+			printf("Data Send %d.\n", data_send);
+			zh_avr_i2c_master_transmit(0x38, (uint8_t *)&data_send, sizeof(data_send), 100 / portTICK_PERIOD_MS);
+			zh_avr_i2c_master_receive(0x38, (uint8_t *)&data_read, sizeof(data_read), 100 / portTICK_PERIOD_MS);
+			printf("Data Read %d.\n", data_read);
+			data_send = 14;
+			printf("Data Send %d.\n", data_send);
+			zh_avr_i2c_master_transmit(0x38, (uint8_t *)&data_send, sizeof(data_send), 100 / portTICK_PERIOD_MS);
+			zh_avr_i2c_master_receive(0x38, (uint8_t *)&data_read, sizeof(data_read), 100 / portTICK_PERIOD_MS);
+			printf("Data Read %d.\n", data_read);
+		}
+		else
+		{
+			printf("Device Not Found.\n");
+		}
+		printf("Task Remaining Stack Size %d.\n", uxTaskGetStackHighWaterMark(NULL));
+		vTaskDelay(5000 / portTICK_PERIOD_MS);
 	}
 	vTaskDelete(NULL);
 }
@@ -45,7 +61,7 @@ int main(void)
 	UCSR0B = (1 << RXEN0) | (1 << TXEN0);
 	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
 	stdout = &uart;
-	xTaskCreate(i2c_example_task, "i2c example task", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL);
+	xTaskCreate(i2c_example_task, "i2c example task", 110, NULL, tskIDLE_PRIORITY, NULL);
 	vTaskStartScheduler();
 	return 0;
 }
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