Power Saving Mode

Meaning

Functional state of a wireless device where the radio and processor enter a low energy condition to conserve battery. Activating power saving mode allows a sensor to remain operational for years on a single small cell. This state is restricted to the software controlled power management of the device and does not include physical disconnection from the power source.

Battery Longevity

Reducing the duty cycle of the transmitter is the most effective way to extend the time between charges. When power saving mode is active, the device only wakes up at scheduled intervals to check for messages or report its status.

Functional Tradeoff

Responsiveness to external commands decreases because the receiver is turned off most of the time. While power saving mode is necessary for remote deployments, it introduces a delay in how quickly the device can react to a new command from the network.

Wakeup Latency

Time required for the hardware to return to a fully operational state can vary from milliseconds to several seconds. Engineers must tune the power saving mode settings to find the right balance between energy use and the speed of data delivery. This configuration depends on the specific needs of the application, such as an alarm system requiring faster response than a soil moisture sensor.

The software stack manages these transitions to ensure that the device does not miss its communication windows. Successful implementation of this mode is required for all long range IoT devices.

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Power Saving Mode

Meaning

Battery Longevity

Functional Tradeoff

Wakeup Latency

What the firm knows, published