NewPing Library: HC-SR04, SRF05, SRF06, DYP-ME007, Parallax PING))) - v1.7

Using Arduino Sensors
1122

Hi Tim

I have been trying out some HC-SR04's with your example codes that you have provided and everything is working quite well. I am however having trouble working out how to blend them together to achieve my goals.

My project basically has 3 sensors measuring height above ground, with one of them being a fixed reference sensor and the other 2 being separate variable height sensors.

I was trying to use the 3 sensor example and mix it with the event timer example and the timer median example to provide an average measurement for all 3 sensors 4 or 5 times a second.

Does this seem like a good idea, and do you have any suggestions about how to mix them together?

This is what i have tried so far without success

#include <NewPing.h>

#define SONAR_NUM 3
#define MAX_DISTANCE 200
#define PING_INTERVAL 33

NewPing sonar[SONAR_NUM]={
  NewPing(7,7,MAX_DISTANCE),
  NewPing(8,8,MAX_DISTANCE),
  NewPing(9,9,MAX_DISTANCE)
};

unsigned int pingSpeed = 50;
unsigned long pingTimer;

void setup() {
  Serial.begin(115200);
  pingTimer = millis();
}

void loop() {
  for (uint8_t i=0; i<SONAR_NUM; i++){
    if (millis() >= pingTimer){
    pingTimer += pingSpeed;
    sonar.ping_timer(echoCheck);
    } 
  }
  
}

void echoCheck() {
  if (sonar.check_timer()){
    Serial.print(sonar.ping_result/US_ROUNDTRIP_CM);
    Serial.println("cm");
  }
}

Thanks

Tony