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import PikaStdLib
import PikaStdDevice
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time = PikaStdDevice.Time()
uart = PikaStdDevice.UART()
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uart.setId(1)
uart.setBaudRate(115200)
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uart.enable()
while True:
time.sleep_ms(500)
readBuff = uart.read(2)
print('read 2 char:')
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print(readBuff)