To remain within the IR2030 rules for a licence exempt short range transmitter we can only use 100mW with a duty cycle of 10%. It will be necessary to limit the nodes incase they receive too much traffic and stray over this duty cycle.
Average over time period
Could measure the length of the longest packet possible (full 64 chars).
Everytime the node transmits it adds this to a variable.
If in a certain time period (1 minute) it exceeds the duty cycle it stops transmitting until it drops back down below the 10%