DFRobot_AS393DFRobot_AS39355/examples/DFRobotAS3935LightningSensorOrdinary/DFRobotAS3935LightningSensorOrdinary.ino

/*!
 * @file DFRobot_AS3935_lightning_sensor_ordinary.ino
 * @brief SEN0290 Lightning Sensor
 * @n This sensor can detect lightning and display the distance and intensity of the lightning within 40 km
 * @n It can be set as indoor or outdoor mode.
 * @n The module has three I2C, these addresses are:
 * @n  AS3935_ADD1  0x01   A0 = 1  A1 = 0
 * @n  AS3935_ADD2  0x02   A0 = 0  A1 = 1
 * @n  AS3935_ADD3  0x03   A0 = 1  A1 = 1
 * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @license     The MIT License (MIT)
 * @author [TangJie](jie.tang@dfrobot.com)
 * @version  V1.0.2
 * @date  2019-09-28
 * @url https://github.com/DFRobot/DFRobot_AS3935
 */

#include "DFRobot_AS3935_I2C.h"

volatile int8_t AS3935IsrTrig = 0;

// The Arduino UNO can only use IO2 or IO3 as interrupt pins, whereas the 
// ESP32 can use all pins as interrupt pins. Connect the lightning sensor's 
// IRQ pin to a GPIO pin on the microcontroller then replace the number 
// below with the connected GPIO pin. 
#define IRQ_PIN       2

// Antenna tuning capcitance (must be integer multiple of 8, 8 - 120 pf)
#define AS3935_CAPACITANCE   96

// Indoor/outdoor mode selection
#define AS3935_INDOORS       0
#define AS3935_OUTDOORS      1
#define AS3935_MODE          AS3935_INDOORS

// Enable/disable disturber detection
#define AS3935_DIST_DIS      0
#define AS3935_DIST_EN       1
#define AS3935_DIST          AS3935_DIST_EN

// I2C address
#define AS3935_I2C_ADDR       AS3935_ADD3

void AS3935_ISR();

DFRobot_AS3935_I2C  lightning0((uint8_t)IRQ_PIN, (uint8_t)AS3935_I2C_ADDR);

void setup()
{

  Serial.begin(115200);
  Serial.println("DFRobot AS3935 lightning sensor begin!");

  while (lightning0.begin() != 0){
    Serial.print(".");
  }
  lightning0.defInit();

  #if defined(ESP32) || defined(ESP8266)
    attachInterrupt(digitalPinToInterrupt(IRQ_PIN),AS3935_ISR,RISING);
  #else
    attachInterrupt(/*Interrupt No*/0,AS3935_ISR,RISING);
  #endif

  // Configure sensor
  lightning0.manualCal(AS3935_CAPACITANCE, AS3935_MODE, AS3935_DIST);
  // Enable interrupt (connect IRQ pin IRQ_PIN: 2, default)

//  Connect the IRQ and GND pin to the oscilloscope.
//  uncomment the following sentences to fine tune the antenna for better performance.
//  This displays the antenna's resonance frequency/16 on IRQ pin (The resonance 
//  frequency will be divided by 16 on this pin)
//  Tuning AS3935_CAPACITANCE to make the frequency within 500/16 kHz ± 3.5%
//  lightning0.setLcoFdiv(0);
//  lightning0.setIRQOutputSource(3);

}

void loop()
{
  // It does nothing until an interrupt is detected on the IRQ pin.
  while (AS3935IsrTrig == 0) {delay(1);}
  delay(5);

  // Reset interrupt flag
  AS3935IsrTrig = 0;

  // Get interrupt source
  uint8_t intSrc = lightning0.getInterruptSrc();
  if (intSrc == 1){
    // Get rid of non-distance data
    uint8_t lightningDistKm = lightning0.getLightningDistKm();
    Serial.println("Lightning occurs!");
    Serial.print("Distance: ");
    Serial.print(lightningDistKm);
    Serial.println(" km");

    // Get lightning energy intensity
    uint32_t lightningEnergyVal = lightning0.getStrikeEnergyRaw();
    Serial.print("Intensity: ");
    Serial.print(lightningEnergyVal);
    Serial.println("");
  }else if (intSrc == 2){
    Serial.println("Disturber discovered!");
  }else if (intSrc == 3){
    Serial.println("Noise level too high!");
  }
}
//IRQ handler for AS3935 interrupts
#if defined(ESP32) || defined(ESP8266)
void IRAM_ATTR AS3935_ISR()
#else
void AS3935_ISR()
#endif
{
  AS3935IsrTrig = 1;
}