Your usage environment is a bit more complicated. All signals are sent from the HUB, and the remote control communicates with the HUB via RF. There are 6 infrared emitting tubes on the HUB, except for the power supply side and the bottom side, the other sides have infrared emission, and there are also Two infrared extension cables. The device and the HUB cannot be blocked. If the seven TVs in the home are all infrared devices, it is difficult for one HUB to meet the needs. If the TV can be controlled by Bluetooth, one HUB may be enough, but the ability of Bluetooth to penetrate the wall is limited. There are two ways to add Roku devices: one is through infrared, the other is through WIFI, please try to add through WIFI, but Roku, HUB, and mobile phone must be connected to the same router. If you have any further questions, you can contact us at sofabaton@outlook.com.