USB to Serial (TTL) Module – CH340G

USB to Serial (TTL) Module – CH340G


USB to Serial (TTL) Module & Adapter based on the CH340G chip with jumper cable.
Note: Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE

Availability: 11 in stock SKU: STC-00120 Categories: , , Tags: ,


It’s a small USB to TTL serial tool, using the CH340G chip. You can use it to connect some serial device to your PC via USB port, like ESP8266 modules, ESP32 modules etc.
  • Compatible with 32-bit & 64-bit Windows, Mac OS 8 to OS X, Linux and Android!
  • To test the unit use the shunt to connect TX and RX (loopback test)
  • 3.3V and 5.0V outputs are available to power your project directly from the adapter.

Download CH340 Datasheet

Drivers Installation

USB to Serial (TTL) Module & Adapter uses the CH340G chip, you might need to install the drivers before it can be detected.


  • Plug it into your computer USB Port.
  • Wait a minute, you can find it in Device Manager.




  • If you can not find the port, please download Driver from Here

Mac OS

Driver download:

On Mac OS Yosemite:

  • Install the CH340 driver
  • Open Terminal program (located in /Applications/Utilities/)
  • Type command: sudo nvram boot-args=”debug=0x146 kext-dev-mode=1″
  • Type password
  • Restart your computer

If you want restore your Mac’s setting, you can exit developer mode by redefining the boot-arg to your previous settings, or clear your boot-args as follows: sudo nvram -d boot-args.

Please submit any technical issue in the forum and we will assist you if you need help.

Additional information

Weight6 g



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