LH (Wakeup Initializer Timer)

This command applies to the XTC RF Module.

Sets or displays the duration of time during which the wake-up initializer is sent. When receiving devices are in Cyclic Sleep Mode, they power-down after a period of inactivity as specified by the ST parameter and will periodically wake and listen for data transmissions. In order for the receiving devices to remain awake, they must detect ~35 ms of the wake-up initializer.

You must use LH whenever a receiving device is operating in Cyclic Sleep mode. The wake-up initializer time must be longer than the cyclic sleep time, which is set by the SM (Sleep Mode) parameter. If the wake-up initializer time is less than the Cyclic Sleep interval, the connection is at risk of missing the wake-up initializer transmission.

To view a diagram of the correct configuration, see Cyclic Sleep Mode (SM = 4 - 8).

LH (Wakeup Initializer Timer)

Binary command

Parameter range

Default

Bytes returned