Hi,
I'm working on a smart meter device which should communicate over ISM band. From what I see the simplest solution is to use a Non-Specific Short range Device frequency bands.
868-868.6 / +14dBm / <1% D.C. is what I started with but we will have a problem with 1% duty cycle since we won't be able to transfer all of the data.
Another interesting one is
433.05 - 434.79 / +10dBm / <10% D.C.
Is there any catch here? This looks much better with 10% duty cycle. Can we expect much worse interference with other devices in this band? Larger antenna is something we can manage.
Another question, what about ERC 70-03 Annex 2 TRACKING, TRACING AND DATA AQUISITION
It states that there are specific bands for meter reading, but I don't understand what this means for us during the certification? I see that APC is required, but cannot find how to implement it.
Any information on this matter is appreciated.
Thanks.