bump for help

@James547 good look, tp link tech guy told me to buy a WPA2 compatible printer and it will work fine. New printer bought and no further forward as it still won't connect. Very disappointed as tp link view is it is a printer issue and nothing to do with the Deco P9 🤷🏻‍♂️🤷🏻‍♂️

@James547 Hi. I had a similar problem with by system on a Halo s12 mesh (support query went to tp-link).  I got my wireless printer via the wireless mesh by enabling DMZ for the printer IP (192.168.1.113) within the mesh.  When adding the printer from my PC LAN i added it manual using TCP/IP using the mesh's IP (192.168192.168.0.139). It find the printer and printing works both from lan and wireless devices. 

Support was of no help - how did you go with your problem ?  Cheers. 

My config is below 

The setup is –

Hard wired LAN

Optus network Modem/router

IP 192.168.0.1 Gateway  with DHCP.

PC via LAN 192.168.0.81    

Halo s12

Lan connected to Optus modem/router

Wan

IP Address:192.168.0.139

Subnet Mask:255.255.255.0

Gateway:192.168.0.1

LAN  

192.168.1.1

With DHCP

Printer connected wireless to Halo s12 (192.168.1.113)  with DMZ enabled.

@NenadMelb I have a couple of questions for you. What do you refere to hard wired LAN?

the Optus modem/router is the one provided by your Internet Provider?

What is DMZ and where is it enabled?

I understand that the correct order is to first add the printer to the wireless network and then add it manually on your PC/MAC viaTCP/IP?

Thank you.