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DW1820a - the general troubleshooting thread


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Tried firmware v5974 but couldn't make it connect to my BT mouse even though it detects it Ok.

DW1820A_BT_FW_v5974.jpg

 

Now, I simply cannot connect to it at all when it previously used to work Ok and quite sustainably so as detailed on p5. I think I'll just stop on this DW1820A non-sense.

 

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Hi all, have been playing around with the driver to see if I can get firmware upload in Mojave  to work on my dw1820a without needing windows to upload the firmware.     It seems to be worki

I put a photo in the hidden area of my reply here. I attached 2 photos below too. I can't explain the reason though, I just followed some threads elsewhere when I was configuring.

Ok, I downloaded the latest driver for DW1820A I could find on Dell's web site here (Win7 64bit for XPS 9350, dated May 2019). I extracted the firmware 1707 for our 0A5C:6412 DW1820A device: BCM4

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Hello there,

 

I bought DW1820A with part number 0VW3T3 (same Mac address in label and in system info).

 

With 2.4 Ghz -> work normal without kext, only add devices properties in Clover.

With 5 Ghz -> can't scan any wifi 5 Ghz (i don't know why)

With bluetooth -> working (Airdrop, Handoff ....)

 

But with 5 Ghz band, how to fixed it ?

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Should work OOB or experiment with country code parameter as per detailed in the guide. I know of no specific issue with 5GHz networks for this card or of any specific mods on the matter. Just make sure both antennas wires are properly connected. Failing that, your card may just be defective...

 

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Please post compressed copy of your Clover EFI folder + compressed saved output from SysInfo. Never heard or seen Wireless die when BT was in used..

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@nickhx, hello.
At present, I have a problem: dw1820a can be used normally with your compiled driver, then I would like to know what content is modified by your source code, or can you share your modified source code, if my request is offensive, please ignore me. Thank you! I hope to get your help.

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Final, i got dw1820A working both WLAN and Bluetooth without kernel panic (10.15)

 

1. I use DW1820A with OVW3T3 (I don't know this way work other DW1820A),

 

Tape pin with guide Naidis 

 

 

2. Remove Pci device + boot-args in clover config

 

<key>PciRoot(0x?)/Pci(0x?,0x0?)/Pci(0x0)</key>
        <dict>
            <key>AAPL,slot-name</key>
            <string>WLAN</string>
            <key>compatible</key>
            <string>pci14e4,4353</string>
            <key>device_type</key>
            <string>Airport Extreme</string>
            <key>model</key>
            <string>Dell DW1820 (BCM4350) 802.11ac wireless</string>
            <key>name</key>
            <string>Airport</string>
        </dict>
    </dict>

 

3. Remove kext BrcmAirportFix

4. Add FakePCIID + FakepciiD_Broadcom_WiFi.kext in C/K/O and L/E

 

 

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