AT commands Diagnostic - sleep status/timing commands
XBee® SX 868 RF Module User Guide
154
Default
0x190 (4 seconds)
ST (Wake Time)
This command applies to the XBee SX 868 RF Module.
Sets or displays the wake time of the device.
For devices in asynchronous sleep, ST defines the amount of time that a device stays awake after it
receives RF or serial data.
For devices in synchronous sleep or synchronous pulse, ST defines the amount of time that a device
stays awake when operating in cyclic sleep mode. The command adjusts the value upwards
automatically if it is too small to function properly based on other settings.
For devices in synchronous sleep or synchronous pulse, the minimum wake time is a function of MT,
SP, NH, NN, and platform dependent values. If you increase SP, NH, NN, or MT, the ST value raises
automatically. The maximum value is one hour (0x36EE80 ms).
Parameter range
0x1 - 0x36EE80 (x 1 ms) (one hour)
Default
0x1F40 (8 seconds)
WH (Wake Host)
This command applies to the XBee SX 868 RF Module.
Sets or displays the wake host timer value.
If you set WHto a non-zero value, this timer specifies a time in milliseconds that the device delays
after waking from sleep before sending data out the UART or transmitting an I/O sample. If the device
receives serial characters, the WH timer stops immediately.
When in synchronous sleep, the device shortens its sleep period by the WHvalue to ensure it is
prepared to communicate when the network wakes up. When in this sleep mode, the device always
stays awake for the WH time plus the amount of time it takes to transmit a one-hop unicast to
another node.
Parameter range
0 - 0xFFFF (x 1 ms)
Default
0
Diagnostic - sleep status/timing commands
The following AT commands are Diagnostic sleep status/timing commands.
SS (Sleep Status)
This command applies to the XBee SX 868 RF Module.
Queries a number of Boolean values that describe the device's status.
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