shared-bindings: Clarify that UART.read() is slow. (#209)
shared-bindings: Clarify that UART.read() is slow. (#209)


adafruit/micropython,adafruit/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython