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UART chip and the chip is suitable for short-range communication between the choice, I generally provide TTL-level compatible with the high output state idle "9600,8, n, 1" format, that is, communication rate of 9600bps, 8 data bit, 1 stop bit, without parity bit. Essentially all of the microprocessor from the grade of a simple machine, four machines, 8-bit machine to a complex 32-bit embedded processor can direct UART interface or directly to the UART format simple signal analysis and decoding than deal directly with the infrared remote control signal to the code much simpler.