How to create a dynamic bar chart from arduino input

Kim_b

How to create a dynamic bar chart from arduino input

in Integration and Hardware • 2 years ago

Hey all,

I am trying to make a dynamic bar chart from button presses that I detect from my Arduino. I have been looking on the internet to find any examples and I found this: http://processing.org/discourse/yabb2/YaBB.pl?num=1260496119

After some tweaking for my own project it gives me a 'dynamic bar' but it starts running without me pressing any buttons.

What do I have to do to make the program react to my button presses? Consumption is the dynamic data to be put into a bar. The data will increase with every button press.

Hopefully some one can help me getting my program to work!

Thanks in advance!

Kim

Here is my code:

Arduino

...
int buttonRec = analogRead(buttons);
Serial.println(buttonRec);
if(buttonRec >= 745 && buttonRec <= 790) {
digitalWrite(ontbijtLED, HIGH);
updateValue(1, 1);
}
if(buttonRec >= 640 && buttonRec <= 710) {
analogWrite(lunchLED, 1023);
updateValue(1, 2);
}
if(buttonRec >= 450 && buttonRec <= 550) {
digitalWrite(dinerLED, HIGH);
updateValue(1, 3);
}
if(buttonRec >= 0 && buttonRec <= 50) {
digitalWrite(snackLED, HIGH);
updateValue(1, 4);
}
if(buttonRec > 800) {
digitalWrite(ontbijtLED, LOW);
analogWrite(lunchLED, 0);
digitalWrite(dinerLED, LOW);
digitalWrite(snackLED, LOW);
}
...

Processing

import processing.serial.*;
Serial myPort;
float weight = 60.3; // kg
float fatPercentage = 28; //%
float activityLevel = 1.2;
float leanMass = (weight * fatPercentage)/100;
float BMR = 370 + (21.6 * leanMass);
float personalEnergy = BMR * activityLevel;
float consumption = 0;
int data;
void setup() {
size(400, 400);
myPort = new Serial(this, Serial.list()[0], 9600);
}
void draw() {
background(0);
fill(150);
rect(80, height, 80, -consumption);
drawGraph();
}
void drawGraph() {
if (myPort.available() > 0) {
data = myPort.read();
}
if (data >= 745 && data <= 790) {
// ontbijt is detected
consumption = consumption + ((25 * personalEnergy)/100);
}
if (data >=640 && data <= 710) {
// lunch is detected
consumption = consumption + ((30 * personalEnergy)/100);
}
if (data >= 450 && data <= 550) {
// diner is detected
consumption = consumption + ((30 * personalEnergy)/100);
}
if (data >= 0 && data <= 50); {
// snack is detected
consumption = consumption + ((5 * personalEnergy)/100);
}
if (data > 800) {
// no button pressed, consumption stays the same
consumption = consumption;
}
}

Replies(1)

Kim_b

Re: How to create a dynamic bar chart from arduino input

2 years ago

I managed to get the program running, here is my revised code

import processing.serial.*;
Serial myPort;
int ontbijt = 5;
int lunch = 5;
int diner = 5;
int snack = 1;
int consumption = 0;
void setup() {
size(400, 400);
myPort = new Serial(this, Serial.list()[0], 9600);
myPort.bufferUntil('\n');
}
void draw() {
background(0);
fill(150);
rect(80, height, 80, -consumption);
}
void serialEvent (Serial myPort) {
String inString = myPort.readStringUntil('\n');
float inByte = float(inString);
if(inByte >= 745 && inByte <= 790) {
// onbijt is detected
consumption+= ontbijt;
}
if(inByte >= 640 && inByte <= 710) {
// lunch is detected
consumption+= lunch;
}
if(inByte >= 450 && inByte <= 550) {
// diner is detected
consumption+= diner;
}
if(inByte >= 0 && inByte <= 50) {
// snack is detected
consumption+= snack;
}
}

The only thing I still need to find out is how to count only a button press is 1 instead as a continuous stream of presses. My buttons are attached to an analog port, so the program should only update 'consumption' when a button is pressed after a release of that button.

If you have a tip for me, PLEASE

Top Reply