You see Camera Offline when your Camera has been powered down, disconnected, logged out, or simply crashed. If you see a wake-up button, please tap on it to see if the Camera can be woken up. If that fails, the only way to bring it back online is regaining physical access to the device. Please (1) tap on the wheel on the upper left on your Camera’s thumbnail (2) tap on “Camera Health Check” to see if the power supply/connection can be improved.
Also, please avoid pressing home button or power key after you set up Camera in the future. Instead, you can tap the Lock icon on the bottom right corner.
You can find some tips for improving the performance of Camera here: