SparkFun Qwiic AS3935 Lightning Detector Hookup Guide
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View the updated tutorial: SparkFun AS3935 Lightning Detector Hookup Guide (v20)
Contributors:
Elias The Sparkiest
Elias The Sparkiest 
Hardware Assembly
This one is very easy to put together if you have a Qwiic enabled microcontroller like the RedBoard Qwiic. Plug a Qwiic cable between the RedBoard Qwiic and the SparkFun AS3935 Lightning Detector. You will also need to solder wire between the RedBoard Qwiic's pin 4 and the Qwiic AS3935's INT pin. For quick testing, an IC hook was used. For a secure connection, we recommend soldering a header or wire between the two.
Note: The sensor has a logic level of 3.3V. I have attached the interrupt to pin 4 on the Redboard Qwiic even though the pin is at 5 volts. This will not harm the AS3935 since we're doing a simple
digitalRead().