# \#minimum

**URL:** https://forums.digi.com/tag/minimum/3037.md

[Latest](https://forums.digi.com/latest.md) · [Categories](https://forums.digi.com/categories.md) · [Tags](https://forums.digi.com/tags.md)

---

## [Is there a minimum wake time (ST) when using synchronous sleep mode?](https://forums.digi.com/t/is-there-a-minimum-wake-time-st-when-using-synchronous-sleep-mode/17320)

<div class="topic-metadata">

**Author:** [@flavia](https://forums.digi.com/u/flavia)\
**Replies:** 2\
**Last updated:** [August 31, 2016, 2:32pm UTC](https://forums.digi.com/t/is-there-a-minimum-wake-time-st-when-using-synchronous-sleep-mode/17320 "2016-08-31T14:32:04Z")

</div>

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 t…