Time on a LoRaWAN device refers to its onboard clock and the timestamps attached to readings or events. Because devices often buffer data and uplink on a schedule to save power, an accurate local clock lets the receiving application reconstruct exactly when each measurement happened rather than when it arrived.
Devices keep time using a real-time clock and stay aligned through the LoRaWAN Application Layer Clock Synchronization specification, gateway-assisted timing, or an onboard GNSS receiver. Class B operation also depends on accurate beacon timing. Timestamped payloads are decoded by the device codec so platforms can order, bill, and audit events reliably.
Common uses include utility metering with interval reads, asset and event logging, scheduled environmental sampling, and any deployment where chronology matters.
When comparing devices, look at:
- Clock accuracy and drift, plus supported synchronization methods
- Class A/B/C support and frequency plans for your region
- Battery life under your reporting interval
- Enclosure rating and a documented payload codec
Match the timing capability to how precisely your application needs events ordered.
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MCF-LW12PLG
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MCF-LW12PLG - Smart Plug
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Frequently asked questions
How do LoRaWAN devices keep accurate time?
Many devices include a real-time clock (RTC) and can be synchronized over the air using the LoRaWAN Application Layer Clock Synchronization specification or by referencing the network server’s gateway timing. Some GNSS-equipped devices derive time from satellites.
Why does a LoRaWAN sensor report a timestamp?
A timestamp marks exactly when a measurement or event occurred. This matters for buffered uplinks, billing intervals, and event logs, where data may be transmitted later than it was captured and must still be ordered correctly.
What is LoRaWAN clock synchronization?
It is a standardized application-layer mechanism (defined by the LoRa Alliance) that lets the network correct each device’s internal clock drift, enabling features such as Class B beacon timing and coordinated measurement schedules.