(V1.3) Download the CH340 Macintosh Signed Driver for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11) and Sierra (10.12) Previous macinstosh downloads if the above doesn’t work for you…

See the github link above for installation instructions if you need them. The following github has up to day pkg files for 1.3, 1.4 and 1.5 at time of writing, thanks to Joshua Wallis for bringing this to my attention…ĭirect Download Links (from the github repo above): If you don’t know, try the 64 bit and if it doesn’t work, the 32 bit.If you are running a 32Bit Windows: – run the SETUP_32.EXE installer.If you are running a 64Bit Windows: – run the SETUP_64.EXE installer.Older Windows Driver Version and Instructions

In the Arduino IDE when the CH340 is connected you will see a COM Port in the Tools > Serial Port menu, the COM number for your device may vary depending on your system.

The CH340 chip is used by a number of Arduino compatible boards to provide USB connectivity, you may need to install a driver, don’t panic, it’s easier than falling off a log, and much less painful.

Lightburn grbl