How to factory reset TP-LINK 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 factory reset TP-LINK Deco P9 v1.x - Default Login & Password

TP-LINK Deco P9 v1.x default Password , Login & Gateway settings :

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

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

You can factory reset your TP-LINK Deco P9 v1.x in the following way(s)
Through the 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.
With the 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.

TP-LINK Deco P9 v1.x router specifications :

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