I have been experimenting with various types of wireless modules to make my own remote control system.
Until now I tried different bluetooth modules, 2.4ghz flysky, 433mhz rf module.
I think now I found the perfect combination.
I made a remote controller with a bluetooth module in master mode. I made a receiver with a bluetooth module in slave mode. I also made an Android app to use when the battery dies out on the remote controller.
Here is the very new demo video:
By the way, I started sharing all my materials and progress. I announced it earlier when giving a speech at Arduino Day 2017. You can find my materials etc. here: Some bits from my talk: