So far, the cheapest data-only plan I can find is from FIDO, which provides 4GB at $10/month for 1 sim card, but this is way more data than I will need for each sensor. Does anybody know of any better pay-as-you-go options, or plans that will allow sharing data across multiple sim cards? The sensors currently use about 200 MB per month, but I should be able to get this way down through optimization.
Any/all advice is welcome. Thanks!