LPWAN and LORA
Internet of things (IoT) has evolved in such way that every day is cheaper, smaller and less power hungry to communicate "things" that were impossible a few years ago. Now technologies like GSM and WiFi are the most used for that task, but has their disadvantages:
GSM, 3G, LTE: High costs: A data plan is needed for communications, high energy consumption
WiFi, BLUETOOTH : Low distance coverage ( tens of meters inside buildings)
high energy consumption!
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To overcome the disadvantages of previous technologies, LPWAN ( Low Power Wide Area Network ) has been proposed, and must fill some requirements: