How to hard reset Deco P9 v1.x router – Default Login & Password

The TP-LINK Deco P9 v1.x router has Gigabit WiFi, 1 N/A ETH-ports and 0 USB-ports. It has a total combined WiFi throughput of 1200 Mpbs.
It is also known as the TP-LINK AC1200 + AV1000 Whole Home Powerline Mesh Wi-Fi System.
How to hard reset Deco P9 v1.x - Default Login & Password

How to hard reset (factory reset) Deco P9 v1.x :

You can hard reset your Deco P9 v1.x with ways bellow
Use web interface :
Open a browser and navigate to the web interface of the router (see default settings below)
In the menu look for System tools and under there find the Factory defaults option
On the Factory defaults page click on the Restore button to perform the reset.
Use RESET/WPS button :
Have the unit powered on
Press and hold the reset (sometimes reset/WPS) button for 10 seconds with a paperclip or other sharp object.
When the SYS led start blinking quickly release the reset button and wait for router to boot back up.

Deco P9 v1.x default Login & Password, factory settings :

If you have performed a reset of your Deco P9 v1.x device or not changed the defaults, you
should
be able to access it with the following settings
Default Network name (SSID): Deco XXXX
Default subnet mask: 255.255.255.0

Deco P9 v1.x router specifications :

System specs
CPU: 750 MHz
RAM: 128 MiB
Flash: n/a
Custom firmwares: None
Connectivity
WiFi: Gigabit (abgn+ac)
WiFi bands
2.4GHz & 5GHz
WiFi throughput: 1200 Mpbs
WAN
1 x N/A port
ETH
1 x N/A port
USB-ports: 0

How to hard reset TP-Link WiFi router