edit: the tile is wrong, It should have been “Fair use Policy Question” But i can’t seem to edit it
Im doing some research on potentionaly using LoRa for a sensor network I am developing. And i hit a small snag. I keep finding references to a fair use policy that is required for free users of the system. However these posts are quite old. And i cant find any recent information on this topic currently.
From what i can find, when using KPN LoRaWAN you need to have a air Time of 1%. So if you message takes 1 second to send you have to not send messages for 99 seconds.
In this project we are measuring animals at a fairly high frequency in order to get location data from them, think once every 30 ish ms. Sending the packets takes 34 ms so thats all good. But due to the possible fair use policy you wont be able to keep sending the data if you were to send it all the time.
But here is the catch, Since we are detecting animals the sensors are not registering things more often than not. So for example, there could be alot of data 1 or 2 hours a day. and the rest of the day is silent.
Furthermore, if we zoom out even further. this system is only on less than seven days a year.. Does that change anything?
Thank you for the quick responses!
Beste antwoord door Rick S.Bekijk origineel
@Joren S ,
Thanks for posting your question!
The limit of 300 messages that we set is indeed per day. So on that rule, you can send 300 messages in one hour and be silent for the rest of the day. But you can not send 300 * 7 in one day and be quiet for the rest of the week, it is really per day.
The rules that the telecom agency sets for LoRa are: you can send a maximum of 1% of the time. You have to calculate this per hour. So a device that transmits for 36 seconds in a row and then is silent for the rest of the hour, adheres to the legal rules of LoRa. How long a LoRa message takes depends on certain dependencies, but we have put an easy calculation tool online: https://www.loratools.nl/#/airtime.
As long as you stay within these limits, LoRa will be fine. If not, you may need to look at another Internet of Things solution. An M2M setup may be a better solution for your project.