STC15L204 + wireless passthrough module NRF24L01 wireless

1、the onboard STC15L204EA single-chip microcomputer, the single chip microcomputer as 3.3 V power supply

2、the onboard NRF24L01 + wireless module

3、the onboard UART interface, used to implement the serial communication

4、the onboard 5 V to 3.3 V AMS1117-3.3 chip

5、all the I/O derivation, and mark the I/O name

6、PCB size: 39(mm) x26(mm)