Don’t connect these pins directly to an RS232 serial port they operate at +/- 12V and can damage your Arduino board. Serial communication on pins TX/RX uses TTL logic levels (5V or 3.3V depending on the board). Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin(). You can use the Arduino environment’s built-in serial monitor to communicate with an Arduino board. Connecting anything to these pins can interfere with that communication, including causing failed uploads to the board. On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. All Arduino boards have at least one serial port (also known as a UART or USART), and some have several. Used for communication between the Arduino board and a computer or other devices. Recently, we’ve been working on a large internet connected machine. I don't know if anyone in the arduino community uses the old serial control characters, but they work perfectly for this use. STX (start of text) and ETX (end of text) were standard ways to mark the begin and end of a message's content, often used in serial protocols.

Now ur ready to go but u need to setup your arduino to perform tricksIn this case i used an app called Bluetooth commander available in google play.The demo sketch is. Browse other questions tagged c arduino intel intel. For example i would use STX and ETX to frame and send. Writing and reading data to and from a serial port.

Arduino serial stx etx