The OpenHAB Netatmo binding tutorial is good enough but, as usual, some precaution must be followed to allow an up-and-running configuration without wasting too much time.
First of all you must connect the main unit to the Netatmo cloud. After creating your personal account on Netatmo web site you can download the app to configure the main device and the additional stations
When the Netatmo API thing is ONLINE (and ONLY when the thing is ONLINE) you can add the things related to your own devices.
If the Netatmo API thing is correctly installed and connected, the main and the outdoor devices parameters, configured on the Netatmo cloud, will be linked automatically to the things exposed by the binding with the correct IDs.
The name of each thing is shown in the device things list
those things must be used on the items/netatmo.items to create the items
the items can then be used on a sitemap
on an habpanel as explained on weather binding article
or in a graph view as explained on How to realize dynamic charts with OpenHAB items
Please note the graph above on the CO2 part. It's in a bedroom and the line starts after a night of sleeping. The CO2 concentration was in the alert zone. Opening the door the concentration decreases slowly in a safer zone. Then the windows have been open ventilating the room and the air quality became very healthy so quickly.
On the Netatmo installation manual it's well explained how to arrange the sensors in order to have reliable measures. For the outdoor device it's strongly recommended to put it inside a dedicated protecting cap like, for example, this one. They are cheap, protect your device from weather and improve a lot the quality of the measures.
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