# 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](https://help.boomerang3.com/s2gw-installation-manual/s2gw-operation/refresh-of-radio-configuration "mention") 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](https://help.boomerang3.com/s2gw-installation-manual/s2gw-operation/sensors-initialisation "mention")when they are detected over radio.
3. [readings-handling](https://help.boomerang3.com/s2gw-installation-manual/s2gw-operation/readings-handling "mention").

To debug the operation check the [udp\_listen\_log\_contents](https://help.boomerang3.com/s2gw-installation-manual/troubleshooting/udp_listen_log_contents "mention").