Article directory
1. Introduction
The serial port of the RF RF decoding module directly outputs the source code of the remote control, which automatically adapts to the parameters of the oscillation resistance. It can be connected to the single-chip microcomputer to judge the code of the remote control to realize various controls, and it can also be connected to the computer to receive data through the serial port.
Parameters
Working voltage: DC 3.3-5.5V
Receiving distance: 100m in open space (specifically based on the power of the transmitter)
Antenna length: 34mm
Size: 20 × 20 × 8mm
interface
2. Preparation before use
| RF RF decoding module serial communication 315Mhz decoding module remote control decoding support 2262/1527 | 1 |
|---|---|
| USB to TTL module USB to serial download line CH340G/RS232 upgrade board brush machine board PL2303 | 1 |
| Dupont Line | some |
3. Test method
Connect the RX of the USB to TTL module and the TX of the dual-band wireless decoding module together, and connect the TX and RX together.
| 5V | VCC |
|---|---|
| GND | GND |
| TXD | RX |
| RXD | TX |
Connect the RF RF decoding module and the USB to TTL module USB to serial port download cable H340G/RS232 upgrade board and PL2303, and then connect it to the computer. As shown in the figure below,
open the serial port debugging assistant, select the port, set the baud rate to 9600, and check the Hex send and Hex receive.
Fourth, the test phenomenon
The default T point is not shorted, the default baud rate is 9600, and the default is to continuously output decoded data. 
Short-circuit point T, only output the decoded data once.
The command is hexadecimal FD 00 04 DF, the baud rate is set to 115200, the modification is successful, the serial port returns F1, and the left indicator flashes twice when sending data.
Summarize
Notes:
(1) Support serial port baud rate: 9600bps, 19200bps, 57600bps, 115200bps, default 9600bps.
(2) Support single output and continuous output of serial port.
(3) Supported decoding chip models: 2260, 2262, 2240, 2264, 1527, 1520, SMC918, FP527 end.
(4) Support decoding frequency 315MHz/433MHz
(5) Support oscillation resistance range of 1.8M-5.6M, 1527 range of 170-190K, pulse width of more than 1ms.
(6) If there is no response when setting the baud rate, power on again.