astrosatch Well there are many times I believe that I am the only one having whatever problem I'm having as well. Never the less, since I have what maybe the same Samsung Galaxy Tablet A and a Pro let me at least tell you how I connect. FWIW I just updated to the very latest FW a few days ago, and I had my first imaging session with it last night. All went perfectly. No problems with PA, Plate Solving, Go To, Plan Mode, Guiding, or any disconnects. First time ever so trouble free. So fingers crossed. Back to your issue here is how I connect:
After I turn on my ASIair Pro I wait to find it listed under the WiFi list on my Tablet. BTW I did get my Pro modified a few months ago with an outside antenna so it's WiFi range is now far better than it originally was. It is now strong enough for my home WiFi to find it. In any case once I see it listed in the WiFi drop down list I click on it to connect my tablet to the ASIair.
After it connects, I then go to the WiFi tab on the ASIair and go to the Station Mode tab. When I open that my home WiFi is listed. I click on that to connect to my home WiFi and that is it............. Yesterday however I did have to cycle off, and back on, the Station mode slider before it connected. After that as you say clear sailing.
I am a total idiot when it comes to fulling understanding how all this is supposed to work and a lot of the solutions others mention, so all I can do is tell you what works for me......... For example my son had to do whatever was necessary for my Home network to be able to find my ASIair.
Before I had my ASIair Pro modified with an outside antenna I could not connect this way...... Back then I just used a 50 Ethernet cable to hard wire my Pro to my home WiFi. That still is my gold standard rock solid most trouble free connection method with virtually instantaneous downloads....... So you may want to give that a try too, if you never tried that. Al