A tweaked out version from : https://github.com/unprovable/LoRaChat
Just add some buttons, and code to make it autonomous
2 red buttons for direction : Left and Right
1 blue button to choose a letter
1 green button to validate pseudo / messages
Then, each arrived or sent messages are displayed with the pseudo at the beginning
and Left button again to come back to the edit message screen
Anf that's it !
See it in action : youtube demo
The board is a : Heltec ESP32 LORA
It's NOT LORAWAN compliant ... In fact it's more a Proof of Concept than a real project ...
But it works ! And i made a few tests of distance coverage, i can confirm that it's quite impressive !
With more options, a clean code and some final design... it can make a decent "off the grid" pager ;-)
See yeah