from pyb import UART uart = UART(1) uart = UART(1, 9600) uart = UART(1, 9600, bits=8, parity=None, stop=1) print(uart) uart.init(2400) print(uart) print(uart.any()) print(uart.write('123')) print(uart.write(b'abcd')) print(uart.writechar(1)) # make sure this method exists uart.sendbreak()