Example Code for Arduino-Basic Serial Echo

Hardware Preparation

• Bluno - An Arduino Bluetooth 4.0 (BLE) Board x1
• Android 4.3+ Devices Or IOS 7.0+ Devices x1
• Micro USB cable x1

Software Preparation

1. Install the Arduino IDE.
2. For Android: Install the APK file into your Android phone.
3. For iOS: Compile the source code into your apple device.

Wiring Diagram

No additional wiring is required. Connect Bluno to your computer via the Micro USB cable.

Other Preparation Work

1. If you stuck in any of the following process, Go to Trouble Shooting section for help.
2. Select the "Arduino Uno" as the target board in Menu->Tools->Board and its serial port.
3. NOTE: If the Bluno was connected, i.e. the LINK led is ON, then it will fail to upload any sketch since the Serial port was occupied by the BLE. Please unlink the connection.

Sample Code

void setup() {
  Serial.begin(115200);  //initial the Serial
}

void loop() {
  if (Serial.available())  {
    Serial.write(Serial.read());//send what has been received
    Serial.println();   //print line feed character
  }
}

Result

For Android

• After connected, Click the "Send Data" button（②） to send the message in the text view(③) to Bluno.
• The Bluno will reply with the same data. Thus you can see the same "received data" （④）.
• Notice that the on-board RX and TX led will blink when sending and receiving the message.

For iOS

• After the Connection state change from "Not Ready!" to "Ready!" (①), Click the "Send" button（④） to send the message in the text view(③) to Bluno.
• The Bluno will reply with the same data. Thus you can see the same "received data" （⑤）.
• Notice that the on-board RX and TX led will blink when sending and receiving the message.