TiLDA MK3/spi
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See here [1] for the main micropython documentation.
SPI1 is used for the board's onboard wifi.
SPI2 is exposed on the 'X' header, under the white silkscreen section for your name.
from pyb import SPI spi = SPI(2) spi.init(SPI.MASTER) spi.send(170) #send int byte spi.send(b'\xAA') #send hex byte