perola
April 23, 2015, 7:17pm
1
Hi everybody,
I have unusual issue with ultrasonic. When my sketch includes I2C library related to RTC - ultrasonic doesn't work. like this below:
#include <Wire.h>
#include <RTClib.h>
#include <NewPing.h>
RTC_DS1307 RTC;
#define TRIGGER_PIN 3
#define ECHO_PIN 4
#define MAX_DISTANCE 100
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
void setup() {
Serial.begin(9600);
Wire.begin();
RTC.begin();
}
void loop()
{
delay(1000);
DateTime now = RTC.now();
Serial.print("Distance,cm : ");
Serial.println(sonar.ping_cm());
}
I also tried to use ultrasonic code without #include <NewPing.h> with simple code of ultrasonic - Result was the same
digitalWrite(Trig, HIGH);
delayMicroseconds(10);
digitalWrite(Trig, LOW);
impulseTime=pulseIn(Echo, HIGH);
distance_sm=impulseTime/58;
But when I remove I2C part of code:
#include <Wire.h>
#include <RTClib.h>
RTC_DS1307 RTC;
void setup() {
Wire.begin();
RTC.begin();
}
My ultrasonic works well.
Thanks in advance,
I also tried to use ultrasonic code without #include <NewPing.h> with simple code of ultrasonic - Result was the same
I can not confirm your findings, and the following code reads the RTC time and finds the distance to an object with an HC_SR04. Please describe your connections for the ultrasonic unit and the RTC. Can you get time readings from the RTC when it is used alone?
#include <Wire.h>
#include <RTClib.h>
//#include <NewPing.h>
RTC_DS1307 RTC;
#define TRIGGER_PIN 3
#define ECHO_PIN 4
#define MAX_DISTANCE 100
//NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
void setup()
{
Serial.begin(9600);
pinMode(TRIGGER_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
Wire.begin();
RTC.begin();
}
void loop()
{
delay(1000);
DateTime now = RTC.now();
Serial.println();
Serial.print(now.year());
Serial.print('/');
Serial.print(now.month());
Serial.print('/');
Serial.print(now.day());
Serial.print(' ');
if (now.hour() < 10)
Serial.print("0");
Serial.print(now.hour());
Serial.print(':');
Serial.print(now.minute());
if (now.minute() < 10)
Serial.print("0");
Serial.print(':');
if (now.second() < 10)
Serial.print("0");
Serial.print(now.second());
Serial.println();
Serial.print("Distance,cm : ");
long duration, distance;
digitalWrite(TRIGGER_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIGGER_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIGGER_PIN, LOW);
duration = pulseIn(ECHO_PIN, HIGH);
distance = (duration / 2) / 29.1;
//Serial.println(sonar.ping_cm());
Serial.println(distance);
}
perola
April 24, 2015, 5:39pm
3
Unfortunately your code doesn't work for me.
Thanks,
On the Leonardo, SDA and SCL are digital pins D2 & D3, so you will have to move your trigger pin.
You are not the first person to be bitten by this.
