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.
Select Update Driver. If Windows doesn't find a new driver, you can try looking for one on the device manufacturer's website and follow their instructions. Reinstall the device driver. In the search box on the taskbar, enter device manager, then select Device Manager. Right-click (or press and hold) the name of the device, and select Uninstall.
Windows
- If your printer stopped working after a recent Microsoft Windows Update, see our Epson Point of Sale and Impact Printers - Windows Update page for important information. Epson TM-T88V Series Model: C31CA85084 Product Home.
- Installs the DCH-compliant Thunderbolt™ bus driver for the Intel® NUC products with Thunderbolt using Windows® 10. This driver is required if you plan to connect Thunderbolt devices.
- Installs the Intel® Serial IO host controller driver version 1.3 for Intel® NUCs. The Intel Serial IO driver is required if you plan to use the I2C, UART, or GPIO host controllers. Not sure if this is the right driver for your Intel NUC? Run Intel® Driver & Support Assistant to automatically detect driver updates.
- Download version 7.6 of our EasyLog USB software, compatible with 32-bit and 64-bit versions of Windows 7, 8 and 10. The latest build of the software includes support for the EL-USB-5+ Event and State data logger as well as improvements to the graphing module.
(Manufacturer’s Chinese Info Link)
- Download the Windows CH340 Driver
- Unzip the file
- Run the installer which you unzipped
- 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.
Older Windows Driver Version and Instructions
Download the Windows CH340 DriverUnzip the folder.If you are running a 64Bit Windows: – run the SETUP_64.EXE installer.If you are running a 32Bit Windows: – run the SETUP_32.EXE installer.If you don’t know, try the 64 bit and if it doesn’t work, the 32 bit.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.
Macintosh
(Manufacturer’s Chinese Info Link)
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…
Direct Download Links (from the github repo above):
See the github link above for installation instructions if you need them.
Previous macinstosh downloads if the above doesn’t work for you…
(V1.3) Download the CH340 Macintosh Signed Driver for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11) and Sierra (10.12)
Inside the zip file you will find a PDF and a “pkg” file, short version, double click the pkg file, the PDF has some extra information.
OSX Sierra (10.12) Note
A kindly user, Maarten Segers reports
FYI, the driver documented here WILL crash on OSX Sierra.
I can personally not test on MacOS and can not vouch for the above drivers at github, but there you go.
See uninstalling information at the bottom of the page if the driver causes problems for you.
Here is an older version of the Mac driver, NOT FOR 10.12 Sierra
(V1.0) Download the CH340 Macintosh Signed Driver for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11)
Linux
(Manufacturer’s Chinese Info Link)
Drivers are almost certainly built into your Linux kernel already and it will probably just work as soon as you plug it in. If not you can download the Linux CH340 Driver (but I’d recommend just upgrading your Linux install so that you get the “built in” one).
Uninstalling From Macinstosh
A couple of Mac users have said “the driver crashes my mac Sierra how do I uninstall”.
Firstly regards the crash make sure you installed the 1.3 version of the driver, not the old one. You could download it directly from the Manufacturers Website in case they have issued an update since I wrote this page.
Secondly a quick google search reveals that this is how you uninstall:
- Open a terminal and type:
cd /Library/Extensions/ - Verify that the .kext file is present:
ls | grep usbserial.kext - Output should be:
usbserial.kext - Then type:
sudo rm -R usbserial.kext - Verify that the .kext file has been removed:
ls | grep usbserial.kext - Output should be empty.
- After you should remove the files stored in receipts folder:
cd /private/var/db/receipts/ - Find the enties:
ls | grep usbserial* - Output should be:
codebender.cc.ch34xinstaller.usbserial.pkg.bom codebender.cc.ch34xinstaller.usbserial.pkg.plist - Remove each one of the files of the above list:
sudo rm -rfilename`
The terms of the software license agreement included with any software you download will control your use of the software.
INTEL SOFTWARE LICENSE AGREEMENTIMPORTANT - READ BEFORE COPYING, INSTALLING OR USING.
Do not use or load this software and any associated materials (collectively,
the 'Software') until you have carefully read the following terms and
conditions. By loading or using the Software, you agree to the terms of this
Agreement. If you do not wish to so agree, do not install or use the Software.
LICENSES: Please Note:
- If you are a network administrator, the 'Site License' below shall
apply to you.
- If you are an end user, the 'Single User License' shall apply to you.
- If you are an original equipment manufacturer (OEM), the 'OEM License'
shall apply to you.
SITE LICENSE. You may copy the Software onto your organization's computers
for your organization's use, and you may make a reasonable number of
back-up copies of the Software, subject to these conditions:
1. This Software is licensed for use only in conjunction with Intel
component products. Use of the Software in conjunction with non-Intel
component products is not licensed hereunder.
2. You may not copy, modify, rent, sell, distribute or transfer any part
of the Software except as provided in this Agreement, and you agree to
prevent unauthorized copying of the Software.
3. You may not reverse engineer, decompile, or disassemble the Software.
4. You may not sublicense or permit simultaneous use of the Software by
more than one user.
5. The Software may include portions offered on terms in addition to those
set out here, as set out in a license accompanying those portions.
SINGLE USER LICENSE. You may copy the Software onto a single computer for
your personal, noncommercial use, and you may make one back-up copy of the
Software, subject to these conditions:
1. This Software is licensed for use only in conjunction with Intel
component products. Use of the Software in conjunction with non-Intel
component products is not licensed hereunder.
2. You may not copy, modify, rent, sell, distribute or transfer any part
of the Software except as provided in this Agreement, and you agree to
prevent unauthorized copying of the Software.
3. You may not reverse engineer, decompile, or disassemble the Software.
4. You may not sublicense or permit simultaneous use of the Software by
more than one user.
5. The Software may include portions offered on terms in addition to those
DTC Port Devices Driver Download For Windows 10
set out here, as set out in a license accompanying those portions.
OEM LICENSE: You may reproduce and distribute the Software only as an
integral part of or incorporated in Your product or as a standalone
Software maintenance update for existing end users of Your products,
excluding any other standalone products, subject to these conditions:
1. This Software is licensed for use only in conjunction with Intel
component products. Use of the Software in conjunction with non-Intel
component products is not licensed hereunder.
2. You may not copy, modify, rent, sell, distribute or transfer any part
of the Software except as provided in this Agreement, and you agree to
prevent unauthorized copying of the Software.
3. You may not reverse engineer, decompile, or disassemble the Software.
4. You may only distribute the Software to your customers pursuant to a
written license agreement. Such license agreement may be a 'break-the-
seal' license agreement. At a minimum such license shall safeguard
Intel's ownership rights to the Software.
5. The Software may include portions offered on terms in addition to those
set out here, as set out in a license accompanying those portions.
NO OTHER RIGHTS. No rights or licenses are granted by Intel to You, expressly
or by implication, with respect to any proprietary information or patent,
copyright, mask work, trademark, trade secret, or other intellectual property
right owned or controlled by Intel, except as expressly provided in this
Agreement.
OWNERSHIP OF SOFTWARE AND COPYRIGHTS. Title to all copies of the Software
remains with Intel or its suppliers. The Software is copyrighted and
protected by the laws of the United States and other countries, and
international treaty provisions. You may not remove any copyright notices
from the Software. Intel may make changes to the Software, or to items
referenced therein, at any time without notice, but is not obligated to
support or update the Software. Except as otherwise expressly provided, Intel
Dtc Port Devices Driver Download For Windows 10 Windows 7
grants no express or implied right under Intel patents, copyrights,
trademarks, or other intellectual property rights. You may transfer the
Software only if the recipient agrees to be fully bound by these terms and if
you retain no copies of the Software.
LIMITED MEDIA WARRANTY. If the Software has been delivered by Intel on
physical media, Intel warrants the media to be free from material physical
defects for a period of ninety days after delivery by Intel. If such a defect
is found, return the media to Intel for replacement or alternate delivery of
the Software as Intel may select.
EXCLUSION OF OTHER WARRANTIES. EXCEPT AS PROVIDED ABOVE, THE SOFTWARE IS
PROVIDED 'AS IS' WITHOUT ANY EXPRESS OR IMPLIED WARRANTY OF ANY KIND
INCLUDING WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT, OR FITNESS FOR A
PARTICULAR PURPOSE. Intel does not warrant or assume responsibility for the
accuracy or completeness of any information, text, graphics, links or other
items contained within the Software.
LIMITATION OF LIABILITY. IN NO EVENT SHALL INTEL OR ITS SUPPLIERS BE LIABLE
FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, LOST PROFITS,
BUSINESS INTERRUPTION, OR LOST INFORMATION) ARISING OUT OF THE USE OF OR
INABILITY TO USE THE SOFTWARE, EVEN IF INTEL HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. SOME JURISDICTIONS PROHIBIT EXCLUSION OR
LIMITATION OF LIABILITY FOR IMPLIED WARRANTIES OR CONSEQUENTIAL OR INCIDENTAL
DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. YOU MAY ALSO HAVE
OTHER LEGAL RIGHTS THAT VARY FROM JURISDICTION TO JURISDICTION.
TERMINATION OF THIS AGREEMENT. Intel may terminate this Agreement at any time
if you violate its terms. Upon termination, you will immediately destroy the
Software or return all copies of the Software to Intel.
APPLICABLE LAWS. Claims arising under this Agreement shall be governed by the
laws of California, excluding its principles of conflict of laws and the
United Nations Convention on Contracts for the Sale of Goods. You may not
export the Software in violation of applicable export laws and regulations.
Dtc Port Devices Driver Download For Windows 10 64-bit
Intel is not obligated under any other agreements unless they are in writing
and signed by an authorized representative of Intel.
GOVERNMENT RESTRICTED RIGHTS. The Software is provided with 'RESTRICTED
RIGHTS.' Use, duplication, or disclosure by the Government is subject to
restrictions as set forth in FAR52.227-14 and DFAR252.227-7013 et seq. or its
successor. Use of the Software by the Government constitutes acknowledgment
of Intel's proprietary rights therein. Contractor or Manufacturer is Intel
2200 Mission College Blvd., Santa Clara, CA 95052.