That&#x27;s a question we hear quite often. The LoRaWAN specification [1] defines three classes of devices. Class C nodes are powered on all the time, which indeed has consequences for the energy consumption. For more energy constrained devices, Class B offers some kind of scheduled rendez-vous, and Class A devices only receive downlink messages after (in response to) sending an uplink message. This allows nodes to switch of their radio when they don&#x27;t need it.<p>[1]: The LoRaWAN specification be downloaded here: <a href="http:&#x2F;&#x2F;www.lora-alliance.org&#x2F;For-Developers&#x2F;LoRaWANDevelopers" rel="nofollow">http:&#x2F;&#x2F;www.lora-alliance.org&#x2F;For-Developers&#x2F;LoRaWANDeveloper...</a>