I’ve been investigating the airtime limits - both for The Things Network and the LoRaWAN specification itself.
In doing so, I found that not only is there a 1% duty cycle limit as we knew before, but also The Things Network sets these limits:
- 30s maximum airtime per 24 hour period
- Maximum 10 downlink messages per 24 hour period
To help with calculating this, I found a Google Sheet that might be useful to others here:
Click on the “Calculator” sheet on the bottom bar.
I know that for my smart greenhouse project I’m going to have to cook up some more clever tricks to reduce the number of downlink messages I’ll be sending.
See also the duty cycle limits & fair access policy: