Hi,
I have the same problem here since Friday with the same device. It used to work for a month or so and then it started to exhibit the same behavior as the OP, the only solution to reconnect a device is to reboot the wifi router.

Archer C1200(EU)_V1_170706

Hi

I have the same router for a few months and have similar problems with different mobile devices that disconnect and connect daily (2 Android mobile phones, and 2 laptops), on both 2.4 and 5 GHz bands. The only way to solve the problem is to reboot the router, but it works only for a few days.
A full reset to factory default make it work again for a longer time, but the problem happens again

I hope a new firmware will solve rapidly this problem. I'm disappointed with the stability of that router.

And please, protect the GUI access with HTTPS

Same router archer c1200(EU)_V1firmware version.:v1_170706. Every day in the morning the same problem. WiFi detected, but not possible reconnect my different devices ( 2 Android phone, laptop, and a notebook). Only they connect if reboot the router.This problem started when I upgrade firmware base. I try downgrade it but is not possible.

Same problem with the same firmware version. This problem started when I upgraded firmware four days ago. With the firmware base not exist this problem. I try downgrade but is not possible.

Same problem with the same firmware version. This problem started when I upgraded firmware four days ago. With the firmware base not exist this problem. I try downgrade but is not possible

I have the same issue! Only rebooting the router helps. I had this since few days on original firmware so decided to update. After update to the newest ver. the same issue...

Good news,
My friend Rodrigo who have contacted with TP-Link Support Engineer, and the engineer Calvin said to him, they are working on this issue. And they are looking for customer to help them debug.
If you face this issue, maybe you can contact [EMAIL="calvin.wang@tp-link.com"]calvin.wang@tp-link.com
I[/EMAIL] think he can help us resolve this issue

Good to hear

Thanks for feedback

Hello, a possible temporary solution. I was sent a beta firmware from the TpLink technical service; once installed, it is possible to downgrade the base firmware version. I copy the email and links in case someone is interested. I already did it downgrade, I will report on its operation. This is the email:

de:	Soporte ES TP-Link
para:	francferba@gmail.com
fecha:	20 de diciembre de 2017, 14:19
asunto:	Re: [Request ID :##45208##] : Problema con TP-LINK Archer(EU)_V1
enviado por:	tp-link.com
firmado por:	tplinkglobal.onmicrosoft.com

Good Morning,
We attach a link with an intermediate fimrware to update your router to this firmware, and thus be able to downgrade to the 160918 version.
Do not leave this firmware installed, install the 160918 and try to see if you still have problems with this version.
This is the solution we can offer at the moment.
Intermediate firmware: https://we.tl/gMktaZGeS6
Firmware 160918: [URL="http://static.tp-link.com/Archer%20C1200(EU)_V1_160918.zip"]http://static.tp-link.com/Archer%20C1200(EU)_V1_160918.zip[/URL]

So do these auto update firmware. I bought mine Oct 30 and has been fine till last week . Have to do the reboot to get it to work for the night.