Lightning detection sensor AS3935

Source: SparkFun Lightning Detector - AS3935 (Qwiic) - SEN-15276 - SparkFun Electronics


The SparkFun Qwiic Lightning Detector adds lightning detection to your next weather station to make sure you are aware of any potential hazardous weather heading your way. The AS3935 is capable of detecting lightning up to 40km away with an accuracy of 1km to the storm front with a sensitive antenna tuned to pick up lightning events in the 500kHz band. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard.


AS3935 Franklin Lightning Sensor™ IC


Lightning sensor IC with embedded distance estimation algorithm.


  • Detection of both cloud to ground and cloud to cloud lightning activity within a 40km range
  • Intelligent algorithm provides for false disturber rejection
  • Supply voltage range of 2.4-5.5V with power down, listening and active power modes
  • Antenna auto tuning
  • Small MLPW-16 (4mmx4mm) package


  • Provides early warning beyond human senses and gives distance estimation to head of storm
  • Algorithm reduces false indications
  • Selectable power modes make it suitable for low power portable devices
  • Antenna auto tuning provides for optimal receive performance
  • Suitable for portable battery powered applications

Product parameters

Channels [#]
Wake-Up Sensitivity [µVpp]
LF Carrier Freq. Range [kHz]
Data Rate (Manch.) [kbit/s]
Dynamic Range [dB]
RSSI Step [dB]
Package MLPQ-16 (4x4)
Features Distance estimation up to 40km in 14 steps \ Embedded distance estimation algorithm & auto antenna tuning
Supply [V] 2.4 - 5.5
Current Consumption [(PD/Listening/Active) µA] 1 / 60 / 350
Interface SPI or I²C
Temperature Range [°C] -40 to +85