CH340 USB to serial TTL adapter With 5/3V jumper (HCMODU0239)

Modules for interfacing including USB to serial and SD adaptors.
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CH340 USB to serial TTL adapter With 5/3V jumper (HCMODU0239)

Post by admin » Fri Jun 09, 2023 2:45 pm


A CH340 based USB to serial TTL adapter. This module makes use of the common CH340 USB interface IC to provide a low cost alternative to the FTDI adapter. It also has the additional feature of being able to select 3.3V*/5V TTL levels by linking the VCC pin to either the 3.3V pin or 5V pin using the supplied jumper.

Note: This module is not suitable for use with ESP modules. Please see alternative item HCMODU0076 instead.


1….5V (USB)
2….VCC (Input, connect to 5V or 3V3 pin via jumper)
3….3V3 (*measured at 3.67V)

USB Drivers:

Most modern operating systems (Windows/OSX/Linux) will support the CH340 via their automatic driver install process so in most cases adding driver support for this development board should be a simple case of plugging the board into your computer. However, if your OS does not automatically install a driver the appropriate driver can be downloaded from below:

Libraries, example code, and diagrams are provided as an additional free service by Hobby Components and are not sold as part of this product. We do not provide any guarantees or warranties as to their accuracy or fitness for purpose.

Descriptions and diagrams on this page are copyright Hobby Components Ltd and may not be reproduced without permission.

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