uart module lets you talk to a device connected to your board using
a serial interface.
init(baudrate=9600, bits=8, parity=None, stop=1, pins=None)¶
Initialize serial communication with the specified parameters on the specified
pins. Note that for correct communication, the parameters have to be the same on both communicating devices.
Initializing the UART will cause the Python console on USB to become unaccessible, as it uses the same hardware. There is currently no way to bring the console back, without restarting the module.
baudratedefines the speed of communication. Common baud rates include:
bitsdefines the size of bytes being transmitted, and the board only supports 8. The
parityparameter defines how parity is checked, and it can be
stopparameter tells the number of stop bits, and has to be 1 for this board.
microbit.pin0is used as the TX pin, and
microbit.pin1as the RX pin. You can also specify which pins you want by passing a tuple of two pins as
pins, the first one being TX, and the second one, RX.
When connecting the device, make sure you “cross” the wires – the TX pin on your board needs to be connected with the RX pin on the device, and the RX pin – with the TX pin on the device. Also make sure the ground pins of both devices are connected.
Trueif any characters waiting, else
Read characters. If
nbytesis specified then read at most that many bytes.
Read as much data as possible.
Return value: a bytes object or
Read bytes into the
nbytesis specified then read at most that many bytes. Otherwise, read at most
Return value: number of bytes read and stored into
Read a line, ending in a newline character.
Return value: the line read or
Noneon timeout. The newline character is included in the returned bytes.
Write the buffer of bytes to the bus.
Return value: number of bytes written or