Discovered your project on Google Play. It works really well with a tablet and phone running Android 11 and 9 respectively. I tested transmission ability about a foot (30.5 cm) apart with the tablet and phone even with some TV background noise and a fan.

This is something I've been after and I'm delighted to have found it. I would like to suggest a couple improvements.

1. The ability for bidirectional messaging for RX/TX at the same time.

2. Encrypted text ability. Something like AES256 or PGP would be great.

Thanks again for this marvelous software. 👍