@Hulao One more thing I will need from you, but you can put it in reply after proceeding with steps I provide below. I'll need to you tell me what Main Deco is connected to: modem, router, or gateway...

@abhishekgujjar Try standard troubleshooting. Power off that Satellite Deco, keep it off for five minutes, power it on. Reboot smartphone with Deco app installed. Screenshots below is how it looks...

@abhishekgujjar I had that issue. It arises from beta code and Deco updating TP-Link cloud with configuration changes. If one change has not propagated through the cloud yet, the next will fail. You...

@abhishekgujjar To make sure you upgrade just the master_bedroom, login to its Web management screen. You can find current master_bedroom IP address in Deco app under its Satellite Deco page. Use...

@abhishekgujjar You have exactly what you need! Your master_bedroom Deco is hardware V4 and you need to have ability to configure just that Deco where connect to (to the bedroom deco). Here is the...

@abhishekgujjar Thanks for sharing this screenshot. It points at possible inconsistency between firmware versions of your Deco nodes, but I'll return to it later. What I need you to find for me is...