Has any of you tried to operate the camera with a USB cord with four connections to connect the camera at the same time via cable with QDSLRDashboard AND the powerbank. In this way you can load the smartphone, power the camera and use QDSLRDashboard at the same time.
I do not know, if this works. In the worst case scenario I might damage the camera...

I wouldn't try such thing. Rather use battery dummy to power the camera or, even better connect the camera via WiFi instead of USB. I do that all the time with my Nikons (I never use USB).

Thank you, Gunther. It is just an idea. I will use the wifi connection. It is to dangerous for the camera.