Accelerometer data (arduino) processing

Contributed Library Questions

mvaughan19

Accelerometer data (arduino) processing

in Contributed Library Questions • 2 years ago

Hi Everybody!

im trying to create a post on twitter when i receive data from my accelerometer.

everything works great;

my arduino code runs and recognizes my accelerometer.

my processing sketch recognizes my accelerometer, and posts to twitter.

the problem is that because the accelerometer always has output of around 550 i am constantly posting to twitter.

how do i set a limit in processing. can you write if statements in processing the same way you do in arduino? (im newish to arduino and this is my first attempt at using processing) in my arduino sketch i have if xvalue is greater than 600 serial print in "ollie"

this works in arduino but i don't know how to translate it in processing.

Arduino Code

// these constants describe the pins. They won't change:
const int groundpin = 2; // analog input pin 2 -- ground
const int powerpin = 4; // analog input pin 4 -- voltage
const int zpin = A2; // z-axis of the accelerometer
const int ypin = A1; // y-axis
const int xpin = A0; // x-axis (only on 3-axis models)
int sensorValue;
void setup() {
// initialize the serial communication:
Serial.begin(9600);
}
void loop() {
if(analogRead(zpin)>600)
Serial.println("Ollie");
Serial.println();
// delay before next reading:
delay(100);
}

Processing code (Twitter4j + graph)

/*
Posts a message to a Twitter account when you press the mouse button.
Uses Twitter4j, http://twitter4j.org.
For more info: http://tinkerlondon.com/now/2010/09/13/oauth-twitter-and-processing/
Daniel Soltis, September 2010
*/
import twitter4j.conf.*;
import twitter4j.internal.async.*;
import twitter4j.internal.org.json.*;
import twitter4j.internal.logging.*;
import twitter4j.http.*;
import twitter4j.api.*;
import twitter4j.util.*;
import twitter4j.internal.http.*;
import twitter4j.*;
import processing.serial.*; //new
String msg = "Ollie"; //my tweet
//copy and paste these from your application in dev.twitter.com
String consumer_key = "cv50u99znWOAOnOEUkhDA";
String consumer_secret = "dzVnD4nLzQd9FAUg47AyEVJKPQgY6ey6dsdOZDsj2FY";
String oauth_token = "276648172-s7m9Z4BPDlREyGJkllFKu84lguDeWkJU4ZKm6Y9E";
String oauth_token_secret = "zKN1i9SGNeh6PDjrEmv8BzeAYrErRac3Mjfs9XjU";
color bgcolor = color(255);
long timer;
Serial myPort; // The serial port
void setup() {
size(640,480);
//new below
// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
//new above
}
void draw() {
background(bgcolor);
bgcolor = color(255);
}
void
serialEvent (Serial myPort) {
Twitter twitter = new TwitterFactory().getOAuthAuthorizedInstance (
consumer_key, consumer_secret,
new AccessToken( oauth_token, oauth_token_secret) );
try {
Status st = twitter.updateStatus(msg + " " + second());
println("Successfully updated the status to [" + st.getText() + "].");
bgcolor = color(0,0,255);
timer = millis();
}
catch (TwitterException e) {
println(e.getStatusCode());
}
}

please help, Thanks.

Replies(10)

mvaughan19

Re: Accelerometer data (arduino) processing

2 years ago

Hi Again.

I need to figure out what to replace mousePressed() with. so instead of mousePressed() it would be accelerometer data >550.

luxxnatura

Re: Accelerometer data (arduino) processing

2 years ago

Hi Mike!
To do what you want to do, you can write the same statement as you had in your Arduino sketch (if xValue > 600...).

:)
See you tomorrow!

mvaughan19

Re: Accelerometer data (arduino) processing

2 years ago

i added if((zpin)>600) and it said Void was unexpected so i changed it to void loop and that seems to be working. also i added int zpin = 2; at the top-ish right under Serial myPort; because i didn't know what zpin was. it ran fine but when i tried it nothing happened, no post....i guess its not reading the if statement properly.

mvaughan19

Re: Accelerometer data (arduino) processing

2 years ago

Hi everyone!

Here is the code im trying to put together but it doesn't seem to work... as in nothing happens when i move the acceleromter

/*
Posts a message to a Twitter account when you press the mouse button.
Uses Twitter4j, http://twitter4j.org.
For more info: http://tinkerlondon.com/now/2010/09/13/oauth-twitter-and-processing/
Daniel Soltis, September 2010
*/
import cc.arduino.*;
import twitter4j.conf.*;
import twitter4j.internal.async.*;
import twitter4j.internal.org.json.*;
import twitter4j.internal.logging.*;
import twitter4j.http.*;
import twitter4j.api.*;
import twitter4j.util.*;
import twitter4j.internal.http.*;
import twitter4j.*;
Arduino arduino;
import processing.serial.*; //new
String msg = "Ollie"; //my tweet
//copy and paste these from your application in dev.twitter.com
String consumer_key = "cv50u99znWOAOnOEUkhDA";
String consumer_secret = "dzVnD4nLzQd9FAUg47AyEVJKPQgY6ey6dsdOZDsj2FY";
String oauth_token = "276648172-s7m9Z4BPDlREyGJkllFKu84lguDeWkJU4ZKm6Y9E";
String oauth_token_secret = "zKN1i9SGNeh6PDjrEmv8BzeAYrErRac3Mjfs9XjU";
color bgcolor = color(255);
long timer;
Serial myPort; // The serial port
int zpin = 2; // z-axis of the accelerometer
int ypin = 1; // y-axis
int xpin = 0;
void setup() {
size(640,480);
//new below
// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
//new above
}
void draw() {
background(bgcolor);
bgcolor = color(255);
twitter();
}
void twitter(){
if(zpin > 600) {
Twitter twitter = new TwitterFactory().getOAuthAuthorizedInstance (
consumer_key, consumer_secret,
new AccessToken( oauth_token, oauth_token_secret) );
try {
Status st = twitter.updateStatus(msg + " " + second());
println("Successfully updated the status to [" + st.getText() + "].");
bgcolor = color(0,0,255);
timer = millis();
}
catch (TwitterException e) {
println(e.getStatusCode());
}
}}

PhiLho

Re: Accelerometer data (arduino) processing

2 years ago

You are checking if zpin, which is 2, is superior to 600. No wonder you don't send messages...
You must read serial data from the Arduino to know the value of the accelerometer. And of course, the Arduino must send it too.
Beside, you should add a time constraint, to limit the number of tweets per minute (I believe there is a daily limit).

mvaughan19

Re: Accelerometer data (arduino) processing

2 years ago

phi.lho i don't think i need a time constraint because im using the accelerometer to collect realtime data and if it does what its suppose to do it posts to twitter.

i'v checked to make sure that the code can link to twitter by deleting the if statement and it worked. (i put it back)

i've added an analogread for the zpin its hovering around 550 (like all accelerometers) and printing in the processing serial monitor

so it must be a problem with my if statement (i think) im used to arduino coding and not that familiar with the processing language what am i doing wrong?

here is my updated code.

/*
Posts a message to a Twitter account when you press the mouse button.
Uses Twitter4j, http://twitter4j.org.
For more info: http://tinkerlondon.com/now/2010/09/13/oauth-twitter-and-processing/
Daniel Soltis, September 2010
*/
import cc.arduino.*;
import twitter4j.conf.*;
import twitter4j.internal.async.*;
import twitter4j.internal.org.json.*;
import twitter4j.internal.logging.*;
import twitter4j.http.*;
import twitter4j.api.*;
import twitter4j.util.*;
import twitter4j.internal.http.*;
import twitter4j.*;
Arduino arduino;
import processing.serial.*; //new
String msg = "Ollie"; //my tweet
//copy and paste these from your application in dev.twitter.com
String consumer_key = "cv50u99znWOAOnOEUkhDA";
String consumer_secret = "dzVnD4nLzQd9FAUg47AyEVJKPQgY6ey6dsdOZDsj2FY";
String oauth_token = "276648172-s7m9Z4BPDlREyGJkllFKu84lguDeWkJU4ZKm6Y9E";
String oauth_token_secret = "zKN1i9SGNeh6PDjrEmv8BzeAYrErRac3Mjfs9XjU";
color bgcolor = color(255);
long timer;
Serial myPort; // The serial port
int zpin = 2; // z-axis of the accelerometer
void setup() {
size(640,480);
//new below
// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 57600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
//new above
arduino = new Arduino(this, Arduino.list()[0], 57600); // you may need to change the "0" depending on your computer.
}
void draw() {
background(bgcolor);
bgcolor = color(255);
twitter();
}
void twitter(){
println (arduino.analogRead(zpin));
if(zpin>600) {
println("entering Twitter method");
println("Twitter auth complete");
Twitter twitter = new TwitterFactory().getOAuthAuthorizedInstance (
consumer_key, consumer_secret,
new AccessToken( oauth_token, oauth_token_secret) );
try {
Status st = twitter.updateStatus(msg + " " + second());
println("Successfully updated the status to [" + st.getText() + "].");
bgcolor = color(0,0,255);
timer = millis();
}
catch (TwitterException e) {
println(e.getStatusCode());
}
}}

PhiLho

Re: Accelerometer data (arduino) processing

2 years ago

I invite you to re-read fully my answer.
To my knowledge (limited in the Arduino field, I reckon), zpin won't be magically updated. So your 'if' condition will be always false.

mvaughan19

Re: Accelerometer data (arduino) processing

2 years ago

how do i update the zpin then?

PhiLho

Re: Accelerometer data (arduino) processing

2 years ago

By reading the value on the serial port and assigning it to zpin or some other variable to use in the condition. Basically, you do the reading in the println(), no?

mvaughan19

Re: Accelerometer data (arduino) processing

2 years ago

Got it thanks!!

here is the final code

/*
Posts a message to a Twitter account when you press the mouse button.
Uses Twitter4j, http://twitter4j.org.
For more info: http://tinkerlondon.com/now/2010/09/13/oauth-twitter-and-processing/
Daniel Soltis, September 2010
*/
import cc.arduino.*;
import twitter4j.conf.*;
import twitter4j.internal.async.*;
import twitter4j.internal.org.json.*;
import twitter4j.internal.logging.*;
import twitter4j.http.*;
import twitter4j.api.*;
import twitter4j.util.*;
import twitter4j.internal.http.*;
import twitter4j.*;
Arduino arduino;
import processing.serial.*; //new
String msg = "Ollie"; //my tweet
//copy and paste these from your application in dev.twitter.com
String consumer_key = "cv50u99znWOAOnOEUkhDA";
String consumer_secret = "dzVnD4nLzQd9FAUg47AyEVJKPQgY6ey6dsdOZDsj2FY";
String oauth_token = "276648172-s7m9Z4BPDlREyGJkllFKu84lguDeWkJU4ZKm6Y9E";
String oauth_token_secret = "zKN1i9SGNeh6PDjrEmv8BzeAYrErRac3Mjfs9XjU";
color bgcolor = color(255);
long timer;
Serial myPort; // The serial port
int zpin=2; // z-axis of the accelerometer
void setup() {
size(640,480);
//new below
// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 57600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
//new above
arduino = new Arduino(this, Arduino.list()[0], 57600); // you may need to change the "0" depending on your computer.
}
void draw() {
background(bgcolor);
bgcolor = color(255);
twitter();
}
void twitter(){
println (arduino.analogRead(zpin));
if((arduino.analogRead(zpin)) > 600)
{
println("entering Twitter method");
println("Twitter auth complete");
Twitter twitter = new TwitterFactory().getOAuthAuthorizedInstance (
consumer_key, consumer_secret,
new AccessToken( oauth_token, oauth_token_secret) );
try {
Status st = twitter.updateStatus(msg + " " + second());
println("Successfully updated the status to [" + st.getText() + "].");
bgcolor = color(0,0,255);
timer = millis();
}
catch (TwitterException e) {
println(e.getStatusCode());
}
}}

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