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LoRaWAN® Application Layer Clock Synchronization Specification v1.0.0

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This package is useful for end-devices which do not have access to other accurate time source. An end-device using LoRaWAN 1.1 or above SHOULD use DeviceTimeReq MAC command instead of this package.

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This package is useful for end-devices which do not have access to other accurate time  source. An end-device using LoRaWAN 1.1 or above SHOULD use DeviceTimeReq MAC  command instead of this package. ClassB end-devices have a more efficient way of synchronizing their clock, the classB network beacon. They SHOULD NOT use this package  and directly use the beacon time information. End-devices with an accurate external clock  source (e.g.: GPS) SHOULD use that clock source instead.