Expansion Kit for OurWeather
Expansion Kit for OurWeather
Expansion Kit for OurWeather
Expansion Kit for OurWeather
Expansion Kit for OurWeather
Expansion Kit for OurWeather
Expansion Kit for OurWeather

Expansion Kit for OurWeather

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OurWeather Expansion Kit 

Now you can detect Lightning, Air Quality and lots else with your OurWeather all-in-one Weather station.

This extender kit brings integrated Lightning detection and lots of other sensors to the OurWeather system.   No soldering required! 


This is for Version 2 of the OurWeather Kit.   OurWeather Kits sold before November 11, 2019 will not work without the OurWeather Upgrade Kit.

OurWeather Expansion Kit

This expansion kit adds lighting detection, an indoor quality sensor, a sunlight sensor and an inside temperature and humidity sensor.   And an RGBW Pixel display.  All integrated into OurWeather.


  • Lightning Detection - The ThunderBoard
  • 6 Port I2C Hub
  • Indoor Air Quality Sensor
  • Sunlight Sensor
  • Inside Temperature and Humidity Sensor
  • Pixel RGBW Display
  • 5 20cm Grove Cables
  • 2 50cm Grove Cables


How does Lightning Detection t work?

The ThunderBoard Lightning detector is based on an AS3935.   The ThunderBoard picks up lightning, puts it through a complex evaluation algorithm and then reports the results to the OurWeather Weather Station.

The Austrian Microsystems AS3935 is a programmable Lightning Sensor IC that detects the presence and approach of potentially hazardous lightning activity in the vicinity and provides an estimation on the distance to the head of the storm. The embedded lightning algorithm checks the incoming signal pattern to reject the potential man-made disturbers and various noise sources.

The AS3935 can also provide information on the noise level and inform OurWeather of the noise. It comes pre-calibrated, meaning that you don’t have to write complex frequency calculation code, you can simply program the correct calibration details and get cracking finding storms.

Every 5 seconds, OurWeather polls the ThunderBoard and picks up the latest information.


New Tutorial on Thunder Board

Here is a new video tutorial for Tuning the ThunderBoard by Dr. Shovic

What Does the ThunderBoard Kit Report?

The ThunderBoard supplies information to the OurWeather software.  Info will show up on the reporting page.

If you would like to read the lightning values directly, and you have an OurWeather kit, type the following into your browser:



where is the IP number of your OurWeather unit. For example, if your IP address of the OurWeather unit (viewable when the OurWeather Unit boots up - See OurWeather Assembly and Operations manual) is, then you would type:

and OurWeather returns the following to your browser:

{"ThunderBoardLast": "6 km,03/31/2018 19:06:38,6,Lightning detected,03/31/2018 19:06:38,1", "id": "1", "name": "OurWeather", "connected": true}

    The fields in order are:


  •     as3935_LastLightning - Distance of the last lightning strike (e.g. 6 km)
  •     as3935_LastLightningTimeStamp - Time of the last lightning strike
  •     as3935_LastLightningDistance - integer distance (e.g. 7)
  •     as3935_LastEvent - The last event recorded by the ThunderBoard (see below)
  •     as3935_LastEventTimeStamp - Time Stamp of last event
  •     as3835_LightningCountSinceBootup - Number of lightning strikes since bootup

Optional ThunderBoard Lightning Simulator

If you want to make testing your unit easier and on-demand, consider the ThunderBoard Lightning Simulator.


  • OurWeather Expansion Kit Assembly and Operations

See the OurWeather product page for the Advanced Manual.