3. Troubleshoot USB Connection Issues in mBlock 5

This guide applies to:

All Makeblock products with mBlock 5.

 

Routine Check

Refer to the quick steps below to rule out basic issues.

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For details, please see this guide: https://support.makeblock.com/hc/en-us/articles/15959305251223

 

In a Nutshell

You may encounter different situations. Here we list two issues frequently asked.

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Step by Step

 

The Connection Button is Grey

After connecting the device to the computer via USB,

mBlock 5 keeps showing "scanning serial port in progress",

and the connection button is inactive.

 

Possible Cause 1: The USB Cable is Faulty

Follow the steps below to troubleshoot.

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Not sure if your data cable support data transfer? See the steps below.

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Possible cause 2: The CH340 Driver isn't Installed Correctly

Please follow the steps below.

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Go to the official website to download the CH340 driver:

Not sure how to check if the installation is successful? See the steps below.

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If the device manager already has a driver program, but mBlock 5 cannot find the port, it is likely because the security software prevents the launch of an identification program. Please quit the security software and the firewall before reinstalling the latest mBlock 5 software.


The Connection Error Message

After the device is connected to the computer via USB,

a pop-up window on mBlock 5 shows that Connection failed though the port is found.

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Possible Cause 1: The CH340 Driver isn't Working

Please refer to the following steps to check if the CH340 driver is working properly.

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Not sure how to reinstall the driver? See the steps below.

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Go to the official website to download the CH340 driver:

 

Possible Cause 2: The COM Port is Occupied.

You may find mBlock 5 cannot be connected even if the port looks fine in the device manager. This happens if the port is occupied by a device before mBot2 is connected.

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Please follow the steps below to troubleshoot.

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Got Questions?

Feel free to contact us at:

service@makeblock.com

 

Help Us Solve Issues Faster

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Not sure how to check the version info? Check the step below.

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