Summary
USB to TTL 4-pin Wire specification:
Embedded convertor: PL2303
Supports windows XP/7/8/8.1/10/...
Connector: USB Type-A plug, 4-pin 2.54mm pinheader
Pinout:
Red - VCC (5V)
Black - GND
Green - TXD (3.3V TTL, connects to target RXD)
White - RXD (3.3V TTL, connects to target TXD)
Length: 1m
