Not getting any STM devices in that list is pretty odd. Obviously if you haven't tried you should completely power cycle the miner and try again. In order to determine if the problem lies with the OrangePi or STM you could do this:

• Remove the OrangePi from the controller board (important). Leave the Ethernet connected.
• Use a USB cable to connect the USB device connector on the controller board with the USB A host port on the Orange Pi
• Use another USB cable to connect the Orange Pi's micro USB port to any other powered device's USB host port (to power the Orange Pi)
• Run the lsusb | grep 0483 command again.

A working setup will show the STM device on Bus 006 (not 007 like when the OrangePi is seated on the controller board directly). If this time you DO get something, then the USB port on the Pi pin headers isn't working, but the STM probably is. If you still get nothing, you could swap controller boards with another Baikal Giant miner (if you have another) and try again.

What was the last firmware you successfully flashed (the one I posted? flexmeister's? One of the stock images?)