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This Tiny Radio Lets Me Send Texts Without Wi-Fi or Cell Service
(www.howtogeek.com)
This is a most excellent place for technology news and articles.
Very low and yes. They work great for IoT, as long as it’s not mission critical stuff as messages can get dropped or arrive out of order sometimes. But for something like monitoring a remote sensor station that’s within the Lora range, without needing a cellular plan, yes.