Is there a minimum wake time (ST) when using synchronous sleep mode?

XBee & XBee Gateway XBee - DigiMesh
, , , ,
1

Hi!

We are using XBee 868 to connect to sensors, some of which are on battery, so we want to minimize the power use.

When building a mesh network (so we set the XBee’s to synchronous sleep mode, SM 8 or SM 7), we try to set the wake time (ST) as short as possible.

It seems like there is a minimum wake time, because when we try to set it to less than 3 seconds it just sets it back to the same value (CA5, or 3237 ms).

The same is true if I try to set it via AT commands.

But I haven’t found anything in the documentation stating a minimum wake time for synchronous sleep modes.

With asynchronous sleep modes we have no problem setting the wake mode to shorter values than this.

Thanks in advance,
Flavia

2

868 LP I assume as 868 Pro has been end of lifed.

Page 69 of the manual is what you are looking for:

The ST parameter will automatically adjust upwards to its minimum value when other AT commands are changed that will affect it (SP, and NH).

3

Close. The NH, BH, and SP time that control the min wake cycle time.