My purpose was to avoid running another USB cable from the iOptron hand controller to the Raspberry Pi3B+, using iOptron's Wifi-to-serial adapter, "StarFi". Here's the basic setup: you plug in the hand controller normally. The adapter comes with two short cables with RJ jacks. The four lead RJ11 cable goes from the RS232 port on the StarFi to the serial port on the hand controller, and the 6 lead RJ-12 runs from the StarFi "Port" to the "iOptron Port" on the CEM25P mount. The instructions guide your through adding the device to your network and using it with ASCOM. I had no problem setting it up with Ekos/INDI, using an IP address instead of a serial port.