In my ye olde project from 2017 I had to do something similar to be able to constantly listen for (after? to? Help me out here Pete, you know I’m from Sweden! ) 433 Mhz radio signals/data bursts.
Basically, I sent data from one UNO (the “radio slave”) to another UNO (the one with Blynk stuff) which has a RX buffer, and then checked for new data once every second. No timing issues there… or am I missing something?
) 433 Mhz radio signals/data bursts.