> 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/troubleshooting/xml_examples/s2gw-no-sensor-detected.md).
# S2GW No sensor detected
The message from S2GW if it did receive an answer from a node over radio saying it does not have the sensor requested. This happens if the sensor is disconnected from the node or faulty.
This message is sent in post with all the readings. The node is polled every time it is required by its period settings.
```xml
5093012No sensor detected (node sends 0xAA)
```
---
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