> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/s2gw-installation-manual/s2gw-operation.md).

# S2GW operation

The chapters below describe the S2GW app v.2.05 operation in detail to make it easier to debug the operation.

The gateway performs the following operations:

1. Start up which is done once after power on or reboot.
2. [Refresh of radio configuration](/s2gw-installation-manual/s2gw-operation/refresh-of-radio-configuration.md) performed every 15 minutes. This period is defined in S2GW config file as SettingsInterval and can be modified if needed. During the refresh the gateway checks and performs [Sensors initialisation](/s2gw-installation-manual/s2gw-operation/sensors-initialisation.md)when they are detected over radio.
3. [Readings handling](/s2gw-installation-manual/s2gw-operation/readings-handling.md).

To debug the operation check the [UDP listen log contents](/s2gw-installation-manual/troubleshooting/udp_listen_log_contents.md). 


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