How To Configure Serial Port In Raspberry Pi

Use the Raspberry Pi Serial Port to Connect to a Device

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This example shows how to create a connectionto a serial device, write data to the device, and read data from thedevice.

By default, the serial console in the customized version of Raspbian Wheezy on your Raspberry Pi™ hardware is enabled. To use the serialdev, the serial console must be disabled.

Warning

Excessive voltage and current can damage the Raspberry Pi hardware. Observe the manufacturer’s precautions for handling the Raspberry Pi hardware and connecting it to other devices. For more information, see https://www.raspberrypi.org/technical-help-and-resource-documents. Dheere dheere naino ko dheere mp3 song free download.

Create a connection to the Raspberry Pi hardware using raspi.

Show the location of the Tx and Rx pins, GPIO14 (UART0_TXD) and GPIO 15 (UART0_RXD),on the GPIO header.

Raspberry Pi hardware uses +3.3V. Do not connect Raspberry Pi hardwaredirectly to devices that use higher voltages.

Connect the Raspberry Pi board to a +3.3V serial device.

To receive data, connect the GPIO 15 (UART0_RXD) pinon the Raspberry Pi board to the TxD pin on the serial device.
To transmit data, connect the GPIO 14 (UART0_TXD) pinon the Raspberry Pi board to the RxD pin on the serial device.
Connect a ground pin, GND, on the Raspberry Pi boardto the GND pin on the serial device.
Connect a +3.3V pin on the Raspberry Pi boardto the VCC pin on the serial device.

Before continuing, research the manufacturer’sproduct information to determine which baud rate, data bits, parity,and stop bit settings the serial device supports.

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Use serialdev to create a connection tothe serial device and assign the connection to a handle.

Serial Port Pinout

In this example, the connection uses the default valuesfor baud rate (115200), data bits (8),parity ('none'), and stop bit (1).

If the serial device requires nondefault values, use a set ofoptional arguments to override those defaults.

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This example overrides the default value of StopBits bysetting it to 2. It uses the other arguments tomaintain the correct sequence of arguments to the left of the rightmostoverriding value.

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This example writes two values to the serial device. It overridesthe default precision, uint8, by setting it to uint16.

You can also read an array of values from the serial port.