I decided to "expand" my project and add rf433 capability.
- Attiny85 with rf transmitter + temperature sensor
- ESP32 with rf receiver added now
What kind of encryption would you suggest that its compatible with both?
I guess writing the key to the EEPROM isn't wise because anyone who could have access to the devices could retrieve the key.
Can the key be retrieved if its written on the "code" on a variable?