Yea, it was quite the pain in the rear to get it the first time. once you have it all synced up and turn everything on Ensequence shouldn't have to mess with it anymore.
Here's what worked for me: connect preferred device to the controller you want to use as master and start the DJI app.
1. Power on the
I2
2. Power on the controller you want to use as the master.
3.select go fly to get into the app
4. Hit the 3 dots in the upper right and go into the controller menu
5. Scroll down to the bottom and select link controller. You'll get s pop up and press ok.
6. Once the countdown begins-press and release the the light/button above the usb slot on the
I2. (This SHOULD sync the controller)
7. Go back into the controller menu and choose master to designate the controller as master. LABEL THAT CONTROLLER AS MASTER SOMEHOW.
8. Repeat process for slave while everything you just set up is still connected.
Hint- every time you fly, power on the master first and let it sync up THEN power on the slave and let it sync.
Hope this helps and happy flying!