Many cities rely on basic WiFi and 2G networks for their sensors and connected devices. As the number of devices increases, and carriers are abandoning 2G, new wireless standards have emerged, offering more range and flexibility.
Most of the current machine-to-machine (M2M) connectivity is working over the 2G GPRS standard, requiring 2G EDGE coverage and SIM cards. As operators phase out some 2G networks, in part to reduce cost, new standards have emerged in the past five years: Zigbee, LoRa, LTE-M, Wi-Fi 802.11ah (HaLow) and 802.11af (White-Fi).
Depending on the application, security needs and cost factors, some are better than others.
FULL STORY: CONNECTIVITY Top wireless standards for IoT devices
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