Fail to add a sensor
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Make sure that the Hub firmware is the latest version (Menu >>> Hubs >>> Hub Settings >>> Firmware Version >>> Click Check Update to check if the Hub firmware is the latest version).

- Add a sensor without correct steps. Please re-add the device according to the instructions on the app.

- The distance between the Hub and the sensor is too far. Please shorten the distance between the Hub and the sensor. Then try to add the sensor again.

- There are too many sensors under this Hub. (The Hub can add up to 10 sensors at most)

**Please click to view**, how to set up sensors `ST4 <../setup/temp-sensor-st4.html>`_ , `ST3 <../setup/climate-sensor-st3.html>`_