The USB-Serial CH340G-Board is a USB to Serial adapter board based on the CH340g chip for Arduino, Lillypad and Paper-Duino that need an external.

Here the manufactorer web-side: http://www.wch.cn/products/CH340.html

usb-serial_ch340g-board_02.zip

LINUX:
normaly not needed but in case https://sparks.gogo.co.nz/assets/_site_/downloads/CH340_LINUX.zip
WIN:
https://sparks.gogo.co.nz/assets/_site_/downloads/CH34x_Install_Windows_v3_4.zip
MAC:
https://sparks.gogo.co.nz/assets/_site_/downloads/CH34x_Install_MAC_10_9_AND_ABOVE_V1_3.zip

One can find a good manual here: https://sparks.gogo.co.nz/ch340.html

The USB-Serial CH340G-Board was designed by Wolfgang Spahn 2018.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.