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# Current Limitations
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* GPIO tracing may be partially unavailable due to issues with the time synchronization. The synchronization status of all observers is monitored on [this page](https://carrel.ethz.ch/zabbix/screens.php?elementid=35).
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* GPIO tracing may be partially unavailable due to issues with the time synchronization. The synchronization status of all observers is monitored on [this page](https://carrel.ethz.ch/zabbix/screens.php?elementid=35).
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* Time synchronization on observers that are synced via the network (PTP) can occasionally be off by tens of microseconds due to changing CPU load on the observer or high network traffic.
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* The accuracy of the GPIO actuation service is in the order of tens of microseconds due to uncertainties in the task execution timing on the observer system (Linux kernel).
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# FlockLab 2 High-Level System Overview
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![flocklab2_very_high_level_overview](uploads/8478a998795e07ffba110930aee784ab/flocklab2_very_high_level_overview.png) |
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