Arduino to Processing - 3x Maxbotix LV EZ-1 daisy chained

andrew.ka..

Arduino to Processing - 3x Maxbotix LV EZ-1 daisy chained

in Integration and Hardware • 1 year ago

Hi everyone,

I am currently running Standard Firmata in Arduino 0022 with an Arduino Nano V3 ATmega328. I am running a simple program to display sensor values from each of the three sonars. I am using Processing 1.5.1.

My problem: The program I wrote does not run properly when I translate it to the Processing IDE. In the Arduino IDE everything works great. When in processing I am using Standard Firmata to establish the connection between Processing and my board.

I have three Maxbotix LV EZ-1 Sonars connected to the Analog inputs: 7, 6, and 5. The Sonars are chained through TX and RX connections to fire in succession. I am using Digital Pin 12 to fire the signal. Here is my code in Arduino:

// Arduino code for reading sensor values from 3 Maxbotix LV EZ-1 Sensors

int signalPinOne = 7;

int signalPinTwo = 6;

int signalPinThree = 5;

int triggerPin = 12; // output pin to start Ultrasound signals

void setup() {

Serial.begin(9600);

pinMode(triggerPin, OUTPUT); // set this pin to output

//give the sensors time to boot up

delay(250);

}

void loop()

{

digitalWrite(triggerPin, HIGH);

delayMicroseconds(30);

digitalWrite(triggerPin, LOW);

delay(50);

int valueOne = analogRead(signalPinOne); //Listen for echo

int valueTwo = analogRead(signalPinTwo);

int valueThree = analogRead(signalPinThree);

Serial.println();

Serial.print("UltraSound Value ONE");

Serial.print( "= ");

Serial.print((valueOne/1.8333));

Serial.println();

Serial.print("UltraSound Value TWO");

Serial.print( "= ");

Serial.print((valueTwo/1.8333));

Serial.println();

Serial.print("UltraSound Value THREE");

Serial.print( "= ");

Serial.print((valueThree/1.8333));

Serial.println();

delay(500);

Serial.println();

}

Here is the code I am using in Processing when Standard Firmata is uploaded to the Arduino:

// processing code for reading sensor values from 3 Maxbotix LV EZ-1 Sensors

import processing.serial.*; // reference the serial library

import cc.arduino.*; // reference the arduino library

Arduino arduino; // create a variable arduino of the Arduino data type

PFont f;

int signalPinOne = 7;

int signalPinTwo = 6;

int signalPinThree = 5;

int triggerPin = 12;

void setup() {

size(1400, 800);

f = loadFont("CourierNewPSMT-48.vlw");

smooth();

println(Serial.list()); // List all the available serial ports:

arduino = new Arduino(this, Arduino.list()[0], 57600);

arduino.pinMode(triggerPin, Arduino.OUTPUT);

}

void draw() {

//triggers pin to pulse on each loop through

arduino.digitalWrite(triggerPin, Arduino.HIGH);

delay(50);

arduino.digitalWrite(triggerPin, Arduino.LOW);

delay(50);

background(40);

frameRate(30);

int valueOne = arduino.analogRead(signalPinOne);

int valueTwo = arduino.analogRead(signalPinTwo);

int valueThree = arduino.analogRead(signalPinThree);

// println((valueOne/1.8333));

// println((valueTwo/1.8333));

// println((valueThree/1.8333));

// display large read out of Inch value of sensor #1

float a = (((valueOne)/1.8333));

fill(255, 255, 255);

textFont(f, width/18);

text("Sensor # 1", 0, width/7.2);

textFont(f, width/6);

text(a, width/4, width/7.2);

// display large read out of Inch value of sensor #2

float b = (((valueTwo)/1.8333));

fill(255, 255, 255);

textFont(f, width/18);

text("Sensor # 2", 0, width/3.33);

textFont(f, width/6);

text(b, width/4, width/3.33);

// display large read out of Inch value of sensor #3

float c = (((valueThree)/1.8333));

fill(255, 255, 255);

textFont(f, width/18);

text("Sensor # 3", 0, width/2.2);

textFont(f, width/6);

text(c, width/4, width/2.2);

delay(100);

}

Any help is much appreciated. Thanks!

Replies(2)

andrew.ka..

Re: Arduino to Processing - 3x Maxbotix LV EZ-1 daisy chained

1 year ago

One thing to note... When I run the processing sketch with Standard Firmata uploaded to the board I do get accurate sensor readings only from sensor THREE. The other two sensors read 0.

anubhav12

Re: Arduino to Processing - 3x Maxbotix LV EZ-1 daisy chained

10 months ago

Hi,

I am using your code to do daisy chain 2 sensors. However, I want to read 5 values from the first sensor and 1 value from the other without interference. I have no idea how to do that Could you please help. I am also controlling the movement of ESc motor using a pot motor in the code (which works).

#include <Servo.h>

int signalPinOne = 3;
int signalPinTwo = 5;
int triggerPin = 12;

Servo myservo; // create servo object to control a servo

int potpin = 0; // analog pin used to connect the potentiometer
int val; // variable to read the value from the analog pin

void setup() {
Serial.begin(9600);
myservo.attach(9); // attaches the servo on pin 9 to the servo object
pinMode(triggerPin, OUTPUT); // set this pin to output
//give the sensors time to boot up
delay(250);
}
void loop()
{
val = analogRead(potpin); // reads the value of the potentiometer (value between 0 and 1023)
val = map(val, 0, 1023, 0, 179); // scale it to use it with the servo (value between 0 and 180)
myservo.write(val); // sets the servo position according to the scaled value
digitalWrite(triggerPin, HIGH);
delayMicroseconds(30);
digitalWrite(triggerPin, LOW);
delay(50);

//Listen for echo
int valueTwo = analogRead(signalPinTwo);


Serial.println();
//Serial.print("UltraSound Value ONE");
//Serial.print( "= ");

int valueOne = analogRead(signalPinOne);
Serial.print(valueOne);
Serial.println();

//Serial.println();
//Serial.print("UltraSound Value TWO");
//Serial.print( "= ");
Serial.print(valueTwo);
// Serial.println();

//Serial.println();

delay(180);

// Serial.println();
//Serial.println();

}

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