Hello,
ButtPlugIO and Lovense devices can be connected by pressing the pink dildo button on the right top side (near the gear/settings button).
In the popup the player can change the according values and connect the desired device. More on how to connect a device by pressing ? (left corner of the desired system Lovense or ButtPlugIO) while in that popup, providing step by step instruction in text and visual images (next help pages). In general, the player inputs the required input once (ip, port) then presses connect button and it works, on next game start, if the connected device starts or is already active the game will send feedback without entering the toy popup settings or hitting connect.
Lovense devices (if supported) can use reverse controls, thrusting the device(for example Max 2) which will trigger thrusts in-game.
Note: If used for feedback only, then i would personally recommend to go with ButtPlugIO (via their Intiface on PC setup), which works with any Bluetooth devices including the actual Lovense devices. It has a very low latency (almost instant) compared to Lovense remote system.
Side note : Blow Job and Default form where supposed to be completely different, first relying on sucction, but since there's a very low amount of devices providing suction (and even those have a very high latency and little control over the suction amount), both mostly rely on vibrations.
About the other controls (joystick ype, non ero devices) : the player should just connect the joystick to the device (PC, Phone) and pressing specific buttons will result in the described commands (mapped for Dualshock4 joystick type and PC keyboard).
I hope this helps
Cheers,
~NK