Power Management

This application note demonstrates how to optimize power consumption.

See System, Power Management for an overview of power management options.

Setting Powersave Mode

The main variables that control power usage are:

• MCU powersave: system.powersave.mode
• Wi-Fi powersave: wlan.powersave.mode

For apps that require moderate throughput use:

set system.powersave.mode 1
set wlan.powersave.mode 2

This reduces WLAN power consumption to near minimum for WLAN clients.

For a module using the WLAN softap, there are no powersave options, since the AP must be awake at all times.

Other Power Management Options

Disable WLAN RSSI Averaging

set wlan.rssi_average 0

See the wlan.rssi_average variable.

Disable Periodic Broadcasting

set broadcast.interval 0

See the broadcast.interval variable.

Disable LED Indicators

set system.indicator.gpio softap -1
set system.indicator.gpio wlan -1
set system.indicator.gpio network -1

See the system.indicator.gpio variable.

Reduce RF Transmit Power

This strategy lowers the radio range of the module, but may save considerable power for transmit intensive applications.

set wlan.tx_power 10

See wlan.tx_power

Adjust Bus Stream Buffering

Keep the bus.stream.flush_count set to the default of 1460.

Other settings depend on whether, in your application, data is streamed continuously, or there are delays between packets.

If data is continuously streaming, set the bus.stream.flush_time to 0 .

set bus.stream.flush_time 0

See bus.stream.flush_time

If there are delays between packets, set the bus.stream.flush_time_reset to true.

set bus.stream.flush_time_reset 1

See the bus.stream.flush_time_reset variable.

Supporting Gecko OS Versions

• Gecko OS 4

Change Log