#Hl 340 usb serial driver pdf#
#Hl 340 usb serial driver install#
#Hl 340 usb serial driver 64 Bit#
#Hl 340 usb serial driver drivers#

A FORSan unit from Amazon gave no reply at all. I purchased 3 from Ebay all give a reply, but its not ascii, typically the high order bit in each reply character is set so a graphics style char is displayed rather than ascii. I've written my own code to send commands and read replies, but they are supposed to work fine with a serial terminal interface like 'Putty' or the linux 'screen' program however they don't.

These are supposed to reply to ascii commands with ascii text in reply. I suspect all are some sort of clone from China, but none of these work properly. On this lsusb says all the new units I purchased use the QinHeng usb to serial adapter and require the associated HL-340 driver. I own and normally use a laptop running a Slackware 14.1 linux distribution. So far I have ordered 4 of these and none appear to work properly. I tried to replace the usb unit last month. I seem to have miss-placed both although I still have a Bluetooth unit that works fine. I am trying this post here as there were a couple posts about this device back in 2016, but nothing about the current series with the QinHeng serial adapter.Īt one time I owned both an rs232 serial ELM327 and a usb unit. Per below I am having trouble purchasing one with the USB interface that works. Its an inexpensive device that plugs into a vehicle under the dash near the steering wheel and allows viewing the cars built in diagnostic codes on a PC.

Output should be. those that do not know this device it is an OBDII scanner interface.

After you should remove the files stored in receipts folder: cd /private/var/db/receipts/.

kext file has been removed: ls | grep usbserial.kext

kext file is present: ls | grep usbserial.kext

Open a terminal and type: cd /Library/Extensions/.

Secondly a quick google search reveals that this is how you uninstall: You could download it directly from the Manufacturers Website in case they have issued an update since I wrote this page.

#Hl 340 usb serial driver install#

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).Ī couple of Mac users have said “the driver crashes my mac Sierra how do I uninstall”.įirstly regards the crash make sure you installed the 1.3 version of the driver, not the old one. (V1.0) Download the CH340 Macintosh Signed Driver for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11)ĭrivers are almost certainly built into your Linux kernel already and it will probably just work as soon as you plug it in. Here is an older version of the Mac driver, NOT FOR 10.12 Sierra See uninstalling information at the bottom of the page if the driver causes problems for you.

#Hl 340 usb serial driver drivers#

I can personally not test on MacOS and can not vouch for the above drivers at github, but there you go.

#Hl 340 usb serial driver pdf#

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.įYI, the driver documented here WILL crash on OSX Sierra. (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):

#Hl 340 usb serial driver 64 Bit#

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.