Infrared Decoding Module

The infrared decoding and encoding module adopts MCU+infrared emitting head+infrared receiving head, which leads out the serial port of MCU to connect other devices that need infrared control, and can be used as infrared wireless data communication and data transmission. It has NEC format infrared code transmission function, which can control 99% NEC infrared format equipment, such as most TV sets, set-top boxes, DVDs, electric fans and other electrical equipment. It only needs to use the serial communication knowledge of the single chip microcomputer to send the specified command through the serial port to transmit the control module; the infrared decoding operation is performed through the serial port receiving mode to obtain the remote control coding information. You can also use the store's USB to TTL combined with the computer to control other devices. After connecting the circuit, the computer host computer software can simply send and receive commands to realize the codec function. Two modules can complete the transceiving operation.
 
Parameter:

    Size: 2.7x1.7x1.3CM
    Supply voltage: DC 5V
    Supply current: >100mA
    Standby power consumption: about 17.5mA
    Communication method: serial communication (5V TTL level)
    Emission distance: 6-10 meters (different depending on the ambient light and the condition of the transceiver)
    Receiving distance: 6-10 meters (related to the power of the transmitting equipment)
    Support NEC encoding chip: (Typical encoding chip such as uPD6121, uPD6122, TC9012 and many compatible chip models, such as PT2221, PT2222, SC6121, SC6122, SC9012, etc.)
    Infrared signal: wavelength 940nm 38KHz
    The baud rate defaults to 9600bps, and the serial port can be set to 4800, 19200, 57600bps.

Instructions:
The indicator light will flash during transmission and reception, otherwise it will be on.
The NEC infrared signal coding consists of a 16-bit user code (divided into 8 high and low 8 bits), 1 command code and 1 command code. That is, "user code 1 + user code 2+ command code + command code inverse code"
Decoding: No need to send any instructions during decoding, just pick up the receiver of the remote control alignment module, and the serial port of the module outputs the infrared code. The result of decoding is viewed through the serial port debugging assistant. The result is output as "user code 1 + user code 2+ command code". You only need to send these three bits when doing code transmission.
The USB to TTL serial board is connected to the infrared transmitting and receiving module, and the computer serial port assistant is turned on for debugging.

-----------Examples-----------

Transmit For NEC signal coded as 1C 2F 33,data bit 3 signal:

{A1,F1,1C,2F,33}

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Modify the serial communication address to 0xa5

{A1,F2,A5,00,00}

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Modify the baud rate to 4800bps (corresponding to serial number 1)

{A1,F3,01,00,00}

Infrared module and USB to TTL-physical connection diagram

Wiring principle:

this combination adopts serial port connection.Special attention is paid to that the TXD and RXD of USB are connected with the RXD and TXD of infrared module respectively.Note that these two ports are not connected against the number.

Combination function: this combination can be used to operate the infrared module on the computer serial assistant or supporting software to decode and transmit infrared signals,so as to control infrared household appliances.