The hackAIR project is slowly coming to an end! While our servers will still remain live for a while, we want to make sure you can continue to use your own sensors as long as possible. For that purpose, we have started a collaboration with OpenSenseMap and created an improved version of the software running on our sensors that sends measurements to both OpenSenseMap and hackAIR.

Below are the step-by-step instructions to upgrade your hackAIR sensor with the new software version. Note: We’ve tested the new software, but we provide these instructions without guarantee. If you have suggestions to improve them, let us know!

3 Steps to upgrade your sensor and make it compatible with OpenSenseMap:

Step 1: Get your access keys

  • Go to and create an account (→ Register)
  • Register your sensor ( → New SenseBox),  select hackAIR as the sensor type and take note of your senseBox ID and senseBox access token.
  • Go to your profile on and take note of your hackAIR access key as well.
  • Connect the sensor to your computer with a micro-USB cable.

Step 2: Upgrade your sensor

These instructions assume that you have installed hackAIR software on your sensor before. If this is your first time, start with Step 2a below before continuing here.

  • Open the Arduino IDE and install the following additional libraries (Sketch ➞ Include Library ➞ Manage Libraries…)
    • Adafruit_MQTT Library by Adafruit
    • ArduinoJson by Benoit Blanchon (Attention! Use version 5.13.2, not version 6)
    • ESP8266 InfluxDb by Tobias Schürg
  • Download the new hackAIR sensor software from and open it. Then upload it to your sensor using Sketch → Upload. That’s it!

Step 3: Connect your sensor to your WiFi

  • Disconnect the sensor from the computer. When you power it up, it will create a temporary WiFi network. With your laptop or phone, connect to the WiFi network ESP-wemos. Go to and configure the WiFi by entering the details of your home WiFi (SSID and password).
  • You will also be asked for your hackAIR access key and your OpenSenseMap credentials (senseBox ID and senseBox access token).
  • Once set up correctly, the temporary network will disappear and the sensor starts sending measurements to both and

Happy measuring!


Step 2a: If this is the first time installing software on your hackAIR sensor

  • Download, install and open the Arduino IDE
  • add the board manager
  • Go to Tools ➞ Board ➞ Boards Manager… and select LOLIN(WEMOS) D1 R2 & mini
  • Select the correct port by going to Tools ➞ Port ➞ [name of the port]
  • Install libraries. Click on Sketch ➞ Include Library ➞ Manage Libraries… and install the following libraries:
    • WiFiManager by tzapu
    • DHT sensor library by Adafruit
    • Adafruit Unified Sensor by Adafruit
    • hackAIR by Thanasis Georgiou

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