SparkFun AS3935 Lightning Detector Hookup Guide (v20)

Contributors: Elias The Sparkiest

More Example Code

If you're looking to tune the antenna's frequency of the SparkFun Lightning Detector then check out the Example 3- Tune Antenna SPI included in the SparkFun Lightning Detector Library. You'll need some method of reading a square wave of at least 4kHz: an oscilloscope, or logical analyzer. As a good starting point, we've found that the resonance frequency of our manufactured boards start at about ~496kHz. The datasheet specifies that the resonance frequency should be within 3.5 percent above or below 500mHz for optimal lightning detection. Our boards ship within less than one percent of that value.