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TP-LINK RE580D not connecting to any 5ghz?

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TP-LINK RE580D not connecting to any 5ghz?

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.

wookii

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2019-12-11 16:15:17 - last edited 2021-12-30 06:09:25

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TP-LINK RE580D not connecting to any 5ghz?

2019-12-11 16:15:17 - last edited 2021-12-30 06:09:25

Model: RE580D

Hardware Version: V1

Firmware Version: 1.0.0 Build 20171220 Rel. 57215

After hours of testing i can not connect to any 5ghz Network.

Status always says 5ghz: "No Signal"

I tried switching channels 36, 40, 100

I tried disabling security
The 5ghz Led only lights up on reboot and never lights up again whatever i do.

I can find the 5ghz Network with Wireless Scanner from RE580D Andmin interface at full Signal.

2.4ghz is working as expected.

Extend Network is disabled for 2.4 and 5ghz.

5ghz is not working even if i disable 2.4 connection.

RE580D has the lates firmware.

VR900v has the lates firmware.

Fritzbox has the lates firmware.

Distance to Router approx 5m.

Not connecting to Fritzbox 7460 and TP-LINK VR900v on 5ghz.

All other devices iphone, ipad, Macbook, Alexa, Samsung Tv can connect to the 5ghz Network.

VR900v setup.

SSID: ALICE
Security: WPA / WPA2 Personal
Version: WPA2-PSK ( AES )
Password: xxx
Mode: 802.11a/n/ac mixed
Channel: Automatic
Channelwidth: Auto
TX: High

RE580D setup:

SSID: ALICE
Security: WPA2-PSK
Password: xxx

The reboot log looks like this:

0 days 00:00:04   OTHERS INFO Booted the system.
0 days 00:00:04   DHCPS INFO DHCP server started
0 days 00:00:07   DHCPS INFO Received a request packet from 70:4D:7B:28:C8:B0
0 days 00:00:07   DHCPS INFO Sent an NAK packet
0 days 00:00:07   DHCPS INFO Received a discovery packet from 70:4D:7B:28:C8:B0
0 days 00:00:09   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:00:09   DHCPS INFO Received a request packet from 70:4D:7B:28:C8:B0
0 days 00:00:09   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:00:12   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 3, 0.
0 days 00:00:13   WIRELESS INFO 2.4G successfully connected to the front end.
0 days 00:00:13   WIRELESS INFO Key exchange between 2.4G and the front end started.
0 days 00:00:13   WIRELESS INFO Key exchange between 2.4G and the front end succeeded.
0 days 00:00:16   DHCPC INFO Sent a detection for DHCP.
0 days 00:00:19   DHCPC INFO Sent a detection for DHCP.
0 days 00:00:19   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 192.168.1.100
0 days 00:00:19   DHCPC INFO Sent a request for DHCP.
0 days 00:00:21   DNS ERROR DNS probing failed, DUT can not get a dns server.
0 days 00:00:21   NTP ERROR NTP detection failed.
0 days 00:00:21   DHCPC INFO DHCP obtained an IP address 192.168.1.100
0 days 00:00:21   DHCPS INFO DHCP server stopped
0 days 00:00:26   DNS INFO DNS detection succeeded.
0 days 00:00:26   NTP INFO NTP detection succeeded.
0 days 00:03:45   WIRELESS INFO 2.4G front end exited: 0, 7
0 days 00:03:48   WIRELESS ERROR 2.4GHz disconnected from the front end.
0 days 00:03:49   DHCPS INFO DHCP server started
0 days 00:03:52   WIRELESS INFO 2.4G successfully connected to the front end.
0 days 00:03:52   WIRELESS INFO Key exchange between 2.4G and the front end started.
0 days 00:03:52   WIRELESS INFO Key exchange between 2.4G and the front end succeeded.
0 days 00:03:52   DHCPS INFO Received a request packet from 70:4D:7B:28:C8:B0
0 days 00:03:52   DHCPS INFO Sent an NAK packet
0 days 00:03:52   DHCPS INFO Received a discovery packet from 70:4D:7B:28:C8:B0
0 days 00:03:54   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:03:54   DHCPS INFO Received a discovery packet from 00:14:EE:08:D0:6A
0 days 00:03:56   DHCPS INFO Provided an offer for the client with ip 192.168.0.101
0 days 00:03:57   DHCPS INFO Received a request packet from 70:4D:7B:28:C8:B0
0 days 00:03:57   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:03:57   DHCPS INFO Received a discovery packet from 00:14:EE:08:D0:6A
0 days 00:03:57   DHCPS INFO Provided an offer for the client with ip 192.168.0.101
0 days 00:03:57   DHCPS INFO Received a request packet from 70:4D:7B:28:C8:B0
0 days 00:03:57   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:03:57   DHCPS INFO Received a request packet from 00:14:EE:08:D0:6A
0 days 00:03:57   DHCPS INFO Sent an ACK packet to 192.168.0.101
0 days 00:03:58   DHCPS INFO Received a request packet from 4C:EF:C0:64:B7:2B
0 days 00:03:58   DHCPS INFO Sent an NAK packet
0 days 00:04:00   DHCPC INFO Sent a detection for DHCP.
0 days 00:04:03   DHCPC INFO Sent a detection for DHCP.
0 days 00:04:03   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 192.168.1.100
0 days 00:04:03   DHCPC INFO Sent a request for DHCP.
0 days 00:04:05   DHCPC INFO DHCP obtained an IP address 192.168.1.100
0 days 00:04:05   DHCPS INFO DHCP server stopped
0 days 00:05:17   WIRELESS ERROR 5G failed to connect to the front end: ASSOC 1, 22.
0 days 00:05:17   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 1, 0.
0 days 00:05:40   WIRELESS ERROR 5G failed to connect to the front end: ASSOC 1, 22.
0 days 00:05:40   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 1, 0.
0 days 00:08:24   WIRELESS ERROR 5G failed to connect to the front end: ASSOC 1, 22.
0 days 00:08:24   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 1, 0.

36 Reply

Sunshine

2020-08-20 08:08:15

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Re:TP-LINK RE580D not connecting to any 5ghz?

2020-08-20 08:08:15

@Mgtpt

Good day.

Can you help me check the following information as well:

What is the model number of your main router?

How long have you have the range extender, and did it work on 5ghz before?

If you enabled the 5ghz of the mobile hotspot, are you able to set up the 5ghz of the range extender with mobile hotspot?

(Or just set up with a different Wi-Fi, would it work on RE580D?)

Thank you!

TP-Link Annual Community Survey | Help Shape Our Community Throughout 2024!

#33

Mgtpt

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2020-08-20 21:31:11 - last edited 2020-08-20 21:36:33

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Re:TP-LINK RE580D not connecting to any 5ghz?

2020-08-20 21:31:11 - last edited 2020-08-20 21:36:33

@Sunshine

Good evening

Of course I will help, and first of all thanks for all the help you can give me:

-What is the model number of your main router?

Huawei EchoLife HS8247W

How long have you have the range extender, and did it work on 5ghz before?

I have the range extender for about 3 months, and it stopped working for about a 1 week ago

If you enabled the 5ghz of the mobile hotspot, are you able to set up the 5ghz of the range extender with mobile hotspot?

First I did a factory reset, and only the 2.4Ghz network appears to me

After a while it appeared at 5Ghz

After connecting to 5GHz, which took some time, I was not assigned any gateway

I can only access the extender through the 2.4 Ghz network

And no, it doesn't work to connect via mobile hotspot and i will leave the log

0 days 00:00:04   OTHERS INFO Booted the system.
0 days 00:00:04   DHCPS INFO DHCP server started
0 days 00:00:12   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 3, 0.
0 days 00:00:13   WIRELESS ERROR 2.4G failed to connect to the front end: SET_SSID 3, 0.
0 days 00:03:25   WIRELESS INFO Sent DEAUTH to 2.4G STA (MAC:D0:EF:C1:F6:B0:6C): 0, 7
0 days 00:07:57   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 5G.
0 days 00:07:57   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:07:59   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:07:59   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:07:59   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:04   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:04   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:09   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:09   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:22   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) exited 5G
0 days 00:08:23   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:23   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:25   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:25   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:30   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:30   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:34   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:34   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:42   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:42   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:08:57   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:08:57   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:09:04   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) exited 5G
0 days 00:09:04   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:09:04   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:09:09   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:09:09   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:09:14   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:09:14   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:09:20   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:09:20   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:09:36   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:09:36   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:10:07   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:10:07   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:10:11   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:10:11   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:10:12   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:10:12   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:10:42   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) exited 5G
0 days 00:12:37   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 5G.
0 days 00:12:39   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 5G.
0 days 00:12:40   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 5G.
0 days 00:12:40   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:12:40   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:12:44   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:12:44   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:12:44   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:12:44   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:13:14   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:13:14   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:13:28   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) exited 5G
0 days 00:13:29   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 2.4G
0 days 00:13:29   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:13:29   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:13:29   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:13:29   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:13:58   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:13:58   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:14:29   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:14:29   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:14:59   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:14:59   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:15:29   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:15:29   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:15:59   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:15:59   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:16:29   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:16:29   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:16:59   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:16:59   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:17:08   WIRELESS INFO 5G successfully connected to the front end.
0 days 00:17:08   WIRELESS INFO Key exchange between 5G and the front end started.
0 days 00:17:08   WIRELESS INFO Key exchange between 5G and the front end succeeded.
0 days 00:17:10   DHCPC INFO Sent a detection for DHCP.
0 days 00:17:11   DNS ERROR DNS probing failed, DUT can not get a dns server.
0 days 00:17:11   NTP ERROR NTP detection failed.
0 days 00:17:13   DHCPC INFO Sent a detection for DHCP.
0 days 00:17:16   DHCPC INFO Sent a detection for DHCP.
0 days 00:17:19   DHCPC ERROR DHCP detection failed.
0 days 00:17:39   DHCPC INFO Sent a detection for DHCP.
0 days 00:17:39   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 192.168.43.111
0 days 00:17:39   DHCPC INFO Sent a request for DHCP.
0 days 00:17:41   DHCPC INFO DHCP obtained an IP address 192.168.43.111
0 days 00:17:41   DHCPS INFO DHCP server stopped
0 days 00:17:52   DNS INFO DNS detection succeeded.
0 days 00:17:52   NTP INFO NTP detection succeeded.
0 days 00:17:55   WIRELESS INFO 5G front end exited: 0, 14
0 days 00:17:58   WIRELESS ERROR 5GHz disconnected from the front end.
0 days 00:17:59   DHCPS INFO DHCP server started
0 days 00:18:01   WIRELESS ERROR 5G failed to connect to the front end: ROAM 3, 4.
0 days 00:18:31   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 2.4G
0 days 00:18:32   WIRELESS INFO STA (MAC:50:EB:71:2A:32:08) successfully connected to 2.4G (WPA).
0 days 00:18:32   DHCPS INFO Received a discovery packet from 50:EB:71:2A:32:08
0 days 00:18:34   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:18:34   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:18:34   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:19:04   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:19:04   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:19:34   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:19:34   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:19:50   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 3, 0.
0 days 00:20:04   DHCPS INFO Received a request packet from 50:EB:71:2A:32:08
0 days 00:20:04   DHCPS INFO Sent an ACK packet to 192.168.0.100

Thank you for all your help

Pedro Magalhaes

#34

Kahzul

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2020-11-02 16:32:55 - last edited 2020-11-02 17:09:30

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Re:TP-LINK RE580D not connecting to any 5ghz?

2020-11-02 16:32:55 - last edited 2020-11-02 17:09:30

@Kevin_Z

I have the same issue. Please also email me that beta firmware!

I have the RE580D for 8 months...

Issues:

No 5GHz signal. No 5GHz network detected.
DHCP Client gives detection errror and keeps restarting every exactly 10 minutes.

Log:

0 days 00:00:04   OTHERS INFO Booted the system.
0 days 00:00:04   DHCPS INFO DHCP server started
0 days 00:00:06   DHCPS INFO Received a request packet from 00:...
0 days 00:00:06   DHCPS INFO Sent an NAK packet
0 days 00:00:06   DHCPS INFO Received a discovery packet from 00:...
0 days 00:00:08   DHCPS INFO Provided an offer for the client with ip 192.168.0.100
0 days 00:00:08   DHCPS INFO Received a request packet from 00:...
0 days 00:00:08   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:00:12   WIRELESS ERROR 5G failed to connect to the front end: SET_SSID 3, 0.
0 days 00:00:13   WIRELESS INFO 2.4G successfully connected to the front end.
0 days 00:00:16   DHCPC INFO Sent a detection for DHCP.
0 days 00:00:19   DHCPC INFO Sent a detection for DHCP.
0 days 00:00:21   DNS ERROR DNS probing failed, DUT can not get a dns server.
0 days 00:00:21   NTP ERROR NTP detection failed.
0 days 00:00:22   DHCPC INFO Sent a detection for DHCP.
0 days 00:00:25   DHCPC ERROR DHCP detection failed.
0 days 00:00:38   DHCPS INFO Received a request packet from 00:...
0 days 00:00:38   DHCPS INFO Sent an ACK packet to 192.168.0.100
0 days 00:00:45   DHCPC INFO Sent a detection for DHCP.
0 days 00:00:45   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 10...
0 days 00:00:45   DHCPC INFO Sent a request for DHCP.
0 days 00:00:47   DHCPC INFO DHCP obtained an IP address 10...
0 days 00:00:47   DHCPS INFO DHCP server stopped
0 days 00:00:52   DNS INFO DNS detection succeeded.
0 days 00:00:52   NTP ERROR NTP detection failed.
0 days 00:10:45   DHCPC ERROR DHCP detection failed.
0 days 00:10:45   DHCPC INFO Sent a detection for DHCP.
0 days 00:10:45   DHCPS INFO DHCP server started
0 days 00:10:45   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 10...
0 days 00:10:45   DHCPC INFO Sent a request for DHCP.
0 days 00:10:47   DHCPC INFO DHCP obtained an IP address 10...
0 days 00:10:47   DHCPS INFO DHCP server stopped
0 days 00:20:44   DHCPC ERROR DHCP detection failed.
0 days 00:20:44   DHCPC INFO Sent a detection for DHCP.
0 days 00:20:44   DHCPS INFO DHCP server started
0 days 00:20:45   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 10...
0 days 00:20:45   DHCPC INFO Sent a request for DHCP.
0 days 00:20:47   DHCPC INFO DHCP obtained an IP address 10...
0 days 00:20:47   DHCPS INFO DHCP server stopped
0 days 00:30:44   DHCPC ERROR DHCP detection failed.
0 days 00:30:44   DHCPC INFO Sent a detection for DHCP.
0 days 00:30:44   DHCPS INFO DHCP server started
0 days 00:30:44   DHCPC INFO Received a DHCP offer:Server ID is 54.Assigned IP address is 10...
0 days 00:30:44   DHCPC INFO Sent a request for DHCP.
0 days 00:30:46   DHCPC INFO DHCP obtained an IP address 10...
0 days 00:30:46   DHCPS INFO DHCP server stopped
0 days 00:40:43   DHCPC ERROR DHCP detection failed.

Extender:

Model: RE580D

Hardware Version: V1

Firmware Version: 1.0.0 Build 20171220 Rel. 57215

Main router:

Altice Labs FiberGateway GR241AG

#35

SteenArnecke

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2021-12-21 21:43:34

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Re:TP-LINK RE580D not connecting to any 5ghz?

2021-12-21 21:43:34

Halo someone or Kevin from tp link Can You send me fast New fimware because My 5ghz can not work om My New Tp link RE580D My e-mail is. Universet64@gmail.com Regard Steen Arnecke From Denmark

#36

SteenArnecke

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2021-12-21 21:47:45

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Re:TP-LINK RE580D not connecting to any 5ghz?

2021-12-21 21:47:45

@wookii

To tp link.

Can You help me to.and send me same New firmware.

Because My New Tp link RE580D not work and can find My 5ghz.

Regard

Steen Arnecke

From Denmark

E-mail.

Universet64@gmail.com

#37

Solla-topee

2021-12-29 15:07:35 - last edited 2021-12-30 06:09:25

Posts: 11369

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Re:TP-LINK RE580D not connecting to any 5ghz?-Solution

2021-12-29 15:07:35 - last edited 2021-12-30 06:09:25

@SteenArnecke @Kahzul sorry about the delay.

Hello everyone,

As this thread is a bit old, we suggest starting a new thread with case here and we could try to help look into the concern further.

Beta Note: Fixed RE580D Failed to connect TP-Link Archer VR900v

RE580D V1 Beta Firmware Download
https://static.tp-link.com/2019/201912/20191213/re580d-up-ver1-0-0-P1[20180720-rel34021].zip

Note:1. please review Terms and Conditions for TP-Link Beta Firmware before try this beta firmware:
2. please identify device hardware version on device label before update the beta, beta is for RE580D V1 only

For RE not detect or failed to connect to 5Ghz Wi-Fi, kindly try some suggestions here:

Case1: If RE did not detect router 5Ghz WiFi, refer to the thread below and change router channel to 36/40/44/48

[Troubleshooting] TP-Link Range Extender is not detecting the 5GHz Signal of the Main Router

If above doesn't work, please start a new thread, with 1) model of router/ AP 2) a photo of Router 5Ghz wireless settings 3) When RE scan for 5G, could RE detect nearby or neighbors 5Ghz signal?

Case 2: If RE was able to detect router's 5Ghz signal, but 5Ghz Led did not light up on RE:

Please refer to this thread for more troubleshooting tips :
Has connected to TP-Link extender but no internet, what can I do?

Verify your Wi-Fi password by forgetting your 5Ghz Wi-Fi network on cell phone first :

Go to Settings-> Wi-Fi on your phone, Tap (or Long press the router's Wi-Fi name ->Forget / Delete the network
Please reconnect to your router Wi-Fi, it will ask for a password, will it accept your router password?

If above doesn't work, please start a new thread, with 1) model for router/ AP 2) a photo of Router 5Ghz wireless settings 3) what Led status on RE, and error after RE set up process

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TP-LINK RE580D not connecting to any 5ghz?

TP-LINK RE580D not connecting to any 5ghz?

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