What works for me is to
- first power up the T1s by pressing the on/off button while holding the B-button as well (a-button will also work depending on what kind of phone you use).
- connect your otg cable from the T1s to your phone
- switch phone to airplane mode
- power up tello
- start up the app you are using
- connect to the tello network
Your t1s can be used in different modes and more than one mode might work. In my case I can use both Android mode (on/off+B or on/off+A on startup) or PC mode (on/off+X on startup). If you use the TelloFPV app and scan for controllers a different mode of controller will result in a different named controller in the app as well. I could not find differences in possibilities so use whatever mode is working.
*Don't power up the T1s.Tried powering up using +A, +B and even +X
Just remember to switch off bluetooth (even if you don't use it)!Thank you all again for your help. The problem was the OTG cable/dongle that I bought from Drone Valley. It wasn’t making a good connection with the T1s. I used the cord that came with the Gamesir and the original dongle that came with my phone and it works. I selected Xbox controller on TelloFPV and voila I’m flying (inside for now) with no Bluetooth interference. Able to adjust controls and assign buttons. Can’t wait to take it outside with an extender and evaluate video. I was getting a lot of frame dropping and pixelation before and hopefully it’ll be better. Hooray!!
Hi, I'm having similar problems. Following U's suggestions I tested the left knob with my phone and it toggled through the apps on my home screen, so the the T1S is talking to my OTG capable phone. I downloaded the USB app. I have an OTG cable that is micro b on both ends and a OTG type C adapter for my phone. When I plug the adapter into my phone it asks my to choose what I want the USB to do. Transfer video or files etc. and I've tried various settings. Turned off bluetooth, airplane mode and the phone says connected but it does not control the tello. The bluetooth on the T1S is sketchy and drops out constantly so that is useless. I also have the T1D but I like the idea of the OTG on the T1S. Any thoughts?