I have been trying to find a way to trigger my SL2 or 7D2 when I fire the shutter on my 5D4. I have a Godox X1T, X1R, and XPro. I just bought the X1R, and it appears I cannot use it to trigger the camera it is attached to unless I hit the test button on the X1T. I cannot believe that it is difficult to take an X-sync signal and fire a ground to the trigger port. The X1R will go back since I cannot do what I want, unless there is a way to use it even with some other product or a DIY pcb that I can put together.
Any ideas? Wouldn't it be an easy firmware update to the X1R to either allow both flash and shutter, just flash, or just shutter when it receives a fire signal from the X1T? It would be a very handy function for us sports shooters and would like increase the sales of the receivers if we could control an array of cameras as we take a shot on the master camera.