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[Yves_fr]

Hello everybody,

on my dap 1665, I've 2 networks (AP mode).
A first one at 2.4 GHz and a second at 5 GHz (wlan0).
The 2.4 GHz works well but randomly (let's say one time a day), the 5 GHz is down, i.e. my labtop and tablet can no longer detect it.
After a reboot, the connection is restored.
On the dap log appears alway the same item just before the breakdown: "wlan0: A STA is deleted by application program".

5 GHz network:
Channel Width: Auto 20/40/80MHz
Channel: 40
Security Mode: AUTO (WPA or WPA2)
Wi-Fi Protected Setup: Enable /Configured

May you help me?
Yves

[FurryNutz]

Link>Welcome!

• What Hardware version is your DAP? Look at the sticker under the DAP.
• Link>What Firmware version is currently loaded? Found on the DAPs web page under status.
• What region are you located?

Has this DAP been working with the laptop and tablet before?

Wireless Configurations
Links>Wireless Installation Considerations and Managing Signal Congestion and Good Neighbour Policy

• Ensure the default (dlink) SSID name is changed. Ensure that different SSID names are used between each WiFi 2.4/5Ghz radios. Can be anything and not something that's already in use by any neighbouring WiFi routers. Under Setup/Wireless/Manual.
• What wireless modes are you using?
• Try single mode N or AC on 5Ghz?
• Try setting a manual Channel to a open or unused channel. Try channel 48 or 149 on 5Ghz.
• What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only.
• Ensure any devices with WiFi adapter drivers are updated.
• Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by that maybe causing interferences?
• Any other WiFi routers in the area that maybe causing interferences? Link> Use a WiFi Scanner to find out. How many?

[Yves_fr]

Many thanks for your fast reply.

Hardware: A1
Firmware: v1.16b01
Region: Europe

Has this DAP been working with the laptop and tablet before?
Yes
SSID:
they have been changed from the defaut (dlink), different between 2.4 and 5 GHz and they are unique (I use wifi analyser to check the neighbouring).
wireless mode: AP

I will follow your other instructions for the futur:
Single AC (I was on N and AC mode)
Manual channel 48 (the mode was auto)
WPA2/AES (I was on auto and TKIP/AES)
Drivers of devices with wifi are updated.
I have a cordless house phone near my dap but the frequency used is around 1.9 GHz.
I use wifi analyser and I've no problem with others wifi routers.

Again thank a lot for your advice.
Yves

[FurryNutz]

I would keep any electronics away from the DAP. At least 4-6 feet away.

Let us know if the changes suggestion help any...

[thomas.huerlimann]

Hi all,

I have the same problem with DAP-1665 HW Rev A Firmware 1.16b01

While i was reading the german support-page, i saw there is a information/note/hint next to the firmware version 1.14b06-01.
In german: "Sollte das 5GHz WLAN Ihres DAP-1665 immer mal wieder ausfallen, installieren Sie bitte diese Firmware in Ihren DAP-1665."
Translated to english: "If the 5GHz WLAN of your DAP-1665 is going down repeatedly, then please install this firmware on your DAP-1665"

If i understand this statement correctly, then there is a know issue in FW 1.16b01 related to 5GHz which is currently unresolved.

Source:
http://www.dlink.com/de/de/support/product/dap-1665-wireless-ac1200-dual-band-access-point

Direct download link
ftp://ftp.dlink.de/dap/dap-1665/driver_software/DAP-1665_fw_reva_114b06-01_ALL_en_20151118.zip

The firmware 1.14b06-01 is not available anymore on the international support-page.

I hope this will resolve your issue as well.

Best regards
Tom

[FurryNutz]

Let us know if v1.14 fw helps resolve your problem. To apply the FW, do a factory reset of the DAP, manually load the FW file using IE11 or FF browser, factory reset the DAP once more then set up from scratch.

[Yves_fr]

In order to follow the discussion,

I've tried every recomandations of FurryNutz.
But ramdon deconnections are still observed whatever the config.

I'll try to downgrade my dap to firmware 1.14...
Thank Tom for your post.
Yves

[FurryNutz]

Let us know how it goes...

[Yves_fr]

Since the downgrade to firmware 1.14 (may 11), my dap 1665 is fully operationnal.
No more problem with the 5 GHz...

Again Thank to Tom and FurryNutz.
Yves

[FurryNutz]

Glad it working. Enjoy.