Standard interface, compliant with Arduino official controller; With power, sending, reveiving indicator; With 3.3V / 5V power supply; Can be used as ordinary USB to serial TTL module, download STC singlechip

Hardware introduction

Adopt FTDI company's FT232RL chip

Lead out FT232RL chip all signal port, TTL / CMOS level

RXD/TXD send-receive communication indicator

USB power supply, can choose 5V or 3.3V interface level (if you need other level, can provide target voltage in VCC and GND pin)