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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 There is no access to EMF-390 v2 on PC Win32		  New Topic  Reply to Topic
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ekaterinamalysh

Russia
1 Posts
Posted - 03/24/2025 :  05:31:00  Show Profile  Reply with Quote
Hi. I have installed the CH341SER driver, but the pc still does not see the EMF-390v2. What could be the problem and how to solve it?
EkaterinaM
Reply #1

EmfDev

2384 Posts
Posted - 03/24/2025 :  12:45:57  Show Profile  Reply with Quote
Check device manager and find USB-Serial CH340 under Ports and check the port number.
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Reply #2

GraceSamuel

United Kingdom
1 Posts
Posted - 03/25/2025 :  02:05:37  Show Profile  Reply with Quote
Thanks! I’ll reinstall the driver and check the connections.
Edited by - GraceSamuel on 03/25/2025 02:06:45
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Reply #3

EmfDev

2384 Posts
Posted - 03/25/2025 :  09:26:16  Show Profile  Reply with Quote
usually, win10/11 does not need to install the driver.
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Reply #4

Liya

Hong Kong
1 Posts
Posted - 01/04/2026 :  22:54:02  Show Profile  Reply with Quote
Please try the following two steps first:
Replace the USB cable: Make sure you are using a cable that supports data transfer, not just a charging cable (many standard cables may only be for charging).
Check Device Manager: After connecting the device, check if "CH340" appears under "Ports" in "Device Manager," or if there is an unknown device with an exclamation mark.
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