@JasperNL I didn' t find any solution except using another cheap access point. I asked Daikin Europe NV by their contact form but no answer at all... Authorized serviceman from some Daikin...

@David-TP I didn't mention it but my deco works in AP mode, fast roaming was set to off, I can't find beamforming option in Deco APP>More>Advanced. What is interesting: today for test purprose I add...

Hi, I have recently installed 3 x Deco M4 mesh and all my 24 :) home devices are connected properly except one: Daikin heat pump with wi-fi adapter BRP069A78. I set 2,4GHz only, WPA/WPA2, now channel...