Actions
Forum Thread Details
  • Replies 1 reply
  • Subscribers 391 subscribers
  • Views 242 views
  • Users 0 members are here
Related

Problem with Firmata in Processing

Former Member

Hello!

Why it does not work? I put piezo sensors into Arduino, and using Firmata as a way to connect processing. However, it does not work.

What I want is when I click the sensor, and a circle will appear.

 

 

Here is my code:

import org.firmata.*; import cc.arduino.*; import processing.serial.*; Arduino arduino;

 

 

int s1 = 7;//(r) //sensor1 int s2 = 8;//(y) //sensor2 int s3 = 9;//(b) //sensor3 int s4 = 10;//(g)//sensor4 int s5 = 11;//(b)//sensor5

 

 

void setup() { size(500, 500); background(255); println(Arduino.list());

 

 

arduino = new Arduino(this, Arduino.list()[4], 57600); arduino.pinMode(s1, Arduino.INPUT); arduino.pinMode(s2, Arduino.INPUT); arduino.pinMode(s3, Arduino.INPUT); arduino.pinMode(s4, Arduino.INPUT); arduino.pinMode(s5, Arduino.INPUT); } void draw() { if (arduino.digitalWrite(s1, Arduino.LOW)) {   ellipse(50, 50, 50, 50); } }

  • Have you verified that simply switching the input with a button or wire short will trigger it, perhaps the piezo is not generating a long or strong enough signal to be detected?, you may need to use an analogue channel and a comparator to generate an interrupt ?

     

    second observation is you're using a digital write where i would expect a read "if (arduino.digitalWrite(s1, Arduino.LOW))", if this is your piezo then you need to read and compare to Arduino.LOW "void draw() {if (arduino.digitalRead(s1)== Arduino.LOW)"{   ellipse(50, 50, 50, 50); } }", though I would expect it also should be comparing to Arduino.HIGH but this depends on how you have it wired.

     

    I don't use processing so my code may be slightly off but you get the idea