There doesn't seem to be much talk of the constrains of using ISM Band frequencies that LoRaWAN runs on. I'm no expert (those who are pls put me right) but wanted to get a conversation going for those new to ISM band coms.
In Europe I'm using a crude rule of thumb which is max of 30 seconds of transmission time in every hour to meet a duty cycle 1%.
// From LoRaWAN spec
Example: A device just transmitted a 0.5 s long frame on one default channel.
This channel is in a sub-band allowing 1% duty-cycle.
Therefore this whole sub-band (868 – 868.6) will be 30 unavailable for 49.5 s.
So in my simple world that is approximately 1 transmission every minuet.
For those who want to dive a little deeper you can use the LoRa calculator
Also those who want to explore Antenna range Link-Labs have neat tool.
Can we add an RF Category to forum please.