CH340 IC is a low cost USB to TTL converter IC. CH340g ICis used in low cost SMD Arduino UNO & Arduino Nano boards. Many USB to Serial converter IC’s are available in the market but this is a low cost IC that is gaining popularity. USB to TTL converter modules are also available based on this IC. Even Node MCU IOT modules also have this IC.

You can download the Drivers for CH340g from below

I just installed the CHG340 Serial Driver on Windows 10 x64. I had much the same results as you. Every time I tried to install, the install program would respond. After hours of work and digging throughout the Internet, I found these drivers for CH341/CH340 is working as expected. Here how you do it; Download the drivers and install relevant setup. This package includes, drivers for linux, mac os x and windows. Download all-in-one drivers pack One more additional step for Mac.

Download CH340g Driver for windows 7, 8 and windows 10

I have personally tested the above CH340 driver on windows 7 and it worked with the Arduino Nano, Node MCU and Arduino UNO clones.

Step By Step Installation of CH340g Drivers

Initially connect your hardware having CH340 USB to Serial IC to your PC. In the device manager it will show “USB2.0-Serial” (as shown in below figure) which means your ch340 driver has not been installed.

Now extract the CH340g drivers in a folder and in that you will find folder named “CH341SER” in which there will be a “setup” application file as shown below.

Open the setup file and a “Driver Setup” option will open. Just click on the install file.

This installation takes some time. In my laptop it took 1 minute so just have patience. Once installed it will show driver successfully installed. Now go again back to device manager and there you will see that the driver has been successfully been installed and a com port has been allotted. In below image you can see that “com19” has been allotted for ch340g IC in my laptop

Drivers for the ch340 IC has now been installed successfully. I have tested this drivers and installation process in Windows XP, windows 7. Will test is soon on Windows 8 & windows 10.

You can see in above image that Port Number 19 has been allocated to this IC. If you want you can even change the virtual com port number from Device Manager.

For MAC users you can check CH340 Installation Guide for MAC users

• CH340 Driver
• 1. How to check the serial port of a device on Windows?
• 2. mBlock 5 cannot identify the serial port after a device is connected to the computer. What can I do?
• 3. The Windows 7 system displays a message indicating that the driver is installed, but the driver is shown with an exclamation mark on Device Manager and the serial port cannot be connected. What can I do?
• 4. After installing the CH340 driver on Windows 7 (not activated) , I cannot see the corresponding serial port on Device Manager. What can I do?
• 5. The Windows Device Manager does not show the Port (Other device) option. What can I do?
• 6. A message is displayed indicating that the pre-installation fails when I install the driver. What can I do?

1. How to check the serial port of a device on Windows?

On Windows, when a hardware device is inserted into the computer, th system automatically identify the device and include it in the device manager. We can view the serial port in the device manager by performing the following steps:

(1) Right-click My Computer (or Computer) and choose Manage.

(2) Choose Device Manager in the window that appears. Click Port. Check the serial port of USB-SERIAL CH340.

The information COM3 included in the parentheses is the serial port.

2. mBlock 5 cannot identify the serial port after a device is connected to the computer. What can I do?

For Windows

Cause: The serial port driver is not successfully installed.

Solution

1. Ensure that you have used a USB cable to connect your device to the computer and turned on the device. (Ensure that the USB interface of the computer works properly).

2. Download the CH340 driver at http://www.wch.cn/download/CH341SER_EXE.html.

The system may instruct you to restart your computer during installation. Follow the instructions.

3. Open Device Manager and check whether the CH340 driver is installed.

If you can see the CH340 driver on Device Manager, mBlock 5 is supported to identity the serial port properly.

If you can see the driver but mBlock 5 still fails to identify the serial port, the identification program of mBlock 5 may be blocked by the security software. Close such software as 360 security or computer housekeeper, and reinstall mBlock 5 again.

For macOS

Solution

1. Ensure that you have used a USB cable to connect your device to the computer and turned on the device. (Ensure that the USB interface of the computer works properly).

2. Download the CH340 driver at http://www.wch.cn/download/CH341SER_MAC_ZIP.html.

The system may instruct you to restart your computer during installation. Follow the instructions.

3. Allow the CH340 driver after the restart.

The system instructs you to restart the computer once again after you click to allow the installation of CH340.

Restart the computer. After the preceding operation, mBlock 5 is supported to identify the serial port of your device.

If no 'Allow' option is provided in step 3, go to step 4.

4. For macOS High Sierra 10.13 or later, kernel extensions can be installed only when users agree. mBlock 5 uses the CH340 serial port driver. You can connect Codey Rocky, mBot, HaloCode and other devices to mBlock 5 only after you agree to install the CH340 serial port driver.

Solution

(1) Start the command-line terminal: Choose Go > Utilities > Terminal.

(2) Copy the following command: sudo kextload /Library/Extensions/usbserial.kext/

(3) Paste the command on the terminal and press Enter.

Dragon burn serial mac lookup. If the Password command appears, enter your computer user password and then press Enter. The following information is displayed:

(4) Choose System Preferences > Security & Privacy > General. You can see that the program is blocked. Click Allow.

3. The Windows 7 system displays a message indicating that the driver is installed, but the driver is shown with an exclamation mark on Device Manager and the serial port cannot be connected. What can I do?

Right-click the driver and choose Properties to view the information in the status bar of the device.

If the information indicating that it's a digital signature problem, you need to install the security update for Windows 7 for x64-based Systems.

Download the security update at https://www.microsoft.com/en-US/download/details.aspx?id=46148.

(The security update is provided for Windows 7 Service Pack 1 (SP1) or later. If your computer runs Windows 7, you need to update it to Win7 SP1. You can download SP1 update at https://www.microsoft.com/en-US/download/details.aspx?id=5842.)

4. After installing the CH340 driver on Windows 7 (not activated) , I cannot see the corresponding serial port on Device Manager. What can I do?

Complete the installation of the driver. If it does not take effect, try restarting your computer.

5. The Windows Device Manager does not show the Port (Other device) option. What can I do?

1. Try to install the CH340 driver. Download it at http://www.wch.cn/download/CH341SER_EXE.html.

2. If the Port option is still not shown after the installation. Try using another USB port or data cable.

3. If the problem persists, try restarting the computer.

6. A message is displayed indicating that the pre-installation fails when I install the driver. What can I do?

1. Try uninstalling the installed CH340 driver, and install it again.

2. For Windows 7, trying installing the following Microsoft security update for Windows 7 for x64-based Systems.

Download the security update at https://www.microsoft.com/en-US/download/details.aspx?id=46148.

(The security update is provided for Windows 7 Service Pack 1 (SP1) or later. If your computer runs Windows 7, you need to update it to Win7 SP1. You can download SP1 update at https://www.microsoft.com/en-US/download/details.aspx?id=5842.)

3. Try enabling the system hardware service.

(1) Enter services.msc in the search box and start it.

(2) Enable the two services marked in the following figure, and install the driver again.