CH340G USB to RS232 TTL Auto Converter Adapter Module for Arduino

Many budget Arduino Nano and Pro Mini clones ship with the CH340G USB-serial chip instead of the original FTDI part, and this adapter matches that chip so uploads via the Arduino IDE go through without timeout errors or manual reset-button presses. It breaks out the same 5V, 3.3V, TXD, RXD, and DTR/RTS lines as a standard FTDI-style programmer, so most existing project wiring and auto-reset circuits carry over without modification. Because CH340-based clones are common and inexpensive, this adapter is a practical backup to keep on a workbench alongside a CP2102 unit, covering a wider range of boards that can show up from different suppliers. The CH340G driver is included by default on Linux and most recent Windows builds, which removes a common first step of frustration for anyone setting up a new Arduino clone for the first time.