Uno R3 CH340 Arduino Compatible
The Arduino Uno R3 CH340G ATmega328p board is a low-cost version of the popular Arduino Uno R3. This board uses the CH340 USB to Serial converter chip, over an Atmega16U2 chip.
We have used plenty of these low-cost Arduino boards with CH340 chips, and have found them to work perfectly. The only time the CH340 chip is used is during programming and when using the serial output of the USB port. During normal operation, this board is identical to the more expensive version without the CH340 chip.