I picked up a cheap Samsung tablet to use with Droidplanner and the 3DR 915 radios I have. The 3DR comes with a cable for connecting to tablets, mini USB on both ends, but the cover is blue on one end--which I understand is supposed to go into the tablet. When I connect the Galaxy to the radio it doesn't power up--I don't get the green power-on light that generally flashes until the radio pairs. The radio works fine on my laptop.
Any ideas? is there some driver required for the tablet?
Possibly, but I found a Asus Nexus 7 at Best Buy for $129, and it looks like it's going to work without fiddling.
Just wondering, have you enabled the USB developer option in the settings menu? With the Galaxy S4 all you need to do is press the "About Device" menu in the "Settings Menu" then find the "Build Number" section, just keep pressing the word "Build Number" and it should be enabled.
I'm assuming your question was to the original poster... so obviously I can't answer that.
When I tried with my Galaxy Tab 4 7" I had NOT enabled "developer options". I have enabled it on the Galaxy Tab 4 8" as I'm running the latest development version of droid planner.. so had to set up Android Studio, my Tab as a development device, etc.
It's definitely worth a try... and now that I think about it even the 7" has to have FTDI (or equivalent) USB host controller. So really the only question is does the 7" output the normal 2A at 5V per the USB spec? Maybe THAT is the difference between the 7" and 8"
I did try one of the OTG apps (USB Host Check) and it was unable to enable USB Host on the Tab 4 7", so my guess is that it's a hardware limitation.
Buy the Asus Nexus 7 for DroidPlanner IMO.