"Most tablets seem to supply power over USB, but many phones do NOT.
Exactly. I tried to connect my smartphone to tablet to get ADB to work. Unfortunately my smartphone (Lenovo) failed to recognize connected tablet as a device.
My friend adviced me basic test if OTG is supported on smartphone.
Connecting usb mouse via OTG cable to smartphone works on tablets but fails on my smartphone ( red laser led is down)
There are apps in Android store and OTG USB Driver For Android claims after check:
This Device Supports USB On-The-Go (OTG) (my Lenovo)
and other OTG Checker app claims quite the opposite
and one another advices me to edit xml file to enable OTG
I will run another test, powering the device/s with powered USB hub as a middle-man, since tested today USB Endoscope camera and installed a number of camera apps and none worked for me, especially AN98 advised by a manufacturer of Encoscope 1m usb camera.
At the same time I can connect my Lenovo smartphone to PC via usb cable to get connection established confirmation for files transfer.
I give up usb hub connection option, as discussed already in
Since I have Terminal Emulator installed I can run adb usb to get : daemon not running, starting it now on port 5038 daemon started successfully error: device not found
Not sure why port assigned is: 5038
should be : 5555 by default
nice option is Name of adb server host (default: localhost) -P Port of adb server ( default: 5037)