• A place where to install the sensor outside: possibility to attach it to the fence of your balcony/terrasse or to your drainpipe, possibility to place it on your windowsill (in which case you must make sure it’s not going to fall), etc.
  • A power point near the place where you want to install your sensor. A 2 meters long cable comes with the sensor. This cable is thin enough and strong enough for a door or a window to be closed on it. You can therefore install the sensor outside and plug it inside.
  • Wifi network that goes all the way to the place where your sensor is installed.

As close as possible from road traffic. If you have a choice between street side and garden side, go for the street side. If you have a choice between ground floor, 1st floor, 2nd floor, etc., go for ground floor.

Sensors installed on garden side or upstairs are very useful anyway. They will allow us to understand better how far can air pollution go.

Ideally you should place the sensor at nose height (around 1m65 – 1m75) based on the floor level (street floor, balcony floor, terrasse floor, garden floor, etc.).

On the configuration page you’ve entered the name of your wifi as well as its password and you’ve clicked on the grey button at the bottom. Yet, “Feinstaubsensor-XXXXXX” still appears in the list of your wifi and when you try to access the data of your sensor you have the error message “Sensor nicht gefunden” (“sensor not found”). Please try the following options:

  • On the configuration page enter again the password of your wifi making sure you type it properly (the difference between capital letters and lower cases might be important). If you haven’t changed it this password should be written on your modem (example Proximus, example Telenet)
  • Make sure the wifi to which you’re trying to connect your sensor uses 2.4GHz, and not 5GHz. This information should be at the top of the configuration page, next to the wifi name.
  • It can happen that, even when the wifi password is correctly written and that the frequency used is 2.4GHz, you still had to repeat this step several times.

It sometimes takes 5 to 10 minutes between the moment when you validate the configuration page and the moment when the message “Sensor nicht gefunden” disappears.

Switch off your wifi. Your sensor (“Feinstaubsensor-XXXXXX”) should appear in the list of wifi. Follow these steps. It might take several attempts.

You need to register your sensor. To do so, follow these steps. Bear in mind that by default the location of your sensor isn’t exact (by a hundrer meters). If you want to display the exact location of your sensor, you must check the box “Publish exact location”.

Unpluging and pluging the sensor again should solve the issue. The problem might also come from the fact that your sensor is to far away from your modem.

A sensor uses around 1 Watt/hour. If it’s plugged in all year long it uses (1 Watt x 24 hours x 365 days)/1000 = 8,76 kWh.

The SDS011 sensor has a life expectancy of 8000 hours according to its manufacturer. The Luftdaten firmware switches on for 20 seconds every 150 seconds. Its life expectancy is therefore multiplied by 7,5. As a result each sensor should work for 4-5 years.

With its shell, a sensor is 23 cm long, 13 cm de high and 7 cm wide.

By default the location of a sensor is by a hundred meters (for personal data protection). When you install your sensor you can decide whether to display its exact location.

As this document shows the sensors are reliable enough to study pollution tendencies, as well as spot areas where air pollution levels are to high.

To access the details and options of you sensor go to http://{ip-du-capteur}/ while connected to the wifi network on which your sensor is installed.

This IP address can be found thanks to applications like Fing (Google play / App store). Once on the app, look for the line that starts with “esp_”. The IP address is just below (192.168.69.XX).

The sensors data can be found here.