Crit 5/10

During the crit we had a small discussion with Mattias on how to solve the problem how the cubes should know what light to turn on. He suggested that we should use infra red. However we felt that it would be easier to till use the pressure sensor for our purposes but decided to only make use of one pressure sensor instead of one in each cube. This sensor would be placed on a mat or a platform of some kind and the cubes could only be placed on top of the pressure sensor in the prototype.

Because of these changes we had to modify the code somewhat. The cubes do not need to decide on the color of the lights anymore but only receive information from the server. The platform sends the current color to the server which passes the information on to the cubes.


Code for the Arduinos:

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 16); // RX, TX

int r = 2;
int g = 3;
int b = 4;
char light;

void setup() {

  Serial.begin(9600);
  
  pinMode(r,OUTPUT);
  pinMode(g,OUTPUT);
  pinMode(b,OUTPUT);
  
  mySerial.begin(9600);
}

void loop()
{
     while(mySerial.available()){
        light = mySerial.read();
        digitalWrite(r,LOW);
        digitalWrite(g,LOW);
        digitalWrite(b,LOW);
        Serial.println(light);
        if(light == 'r'){
          digitalWrite(r,HIGH);
          }
          else if(light == 'b'){
          digitalWrite(b,HIGH);
          }
          else if(light == 'g'){
          digitalWrite(g,HIGH);
          }        
      }
}

Code for the platform:

#include <SoftwareSerial.h>

//SoftwareSerial mySerial(8, 9); // RX, TX

int test;
char check;

void setup() {

  Serial.begin(9600);

  
  //mySerial.begin(9600);
}

void loop()
{
    int sensorValue = analogRead(A0);
    // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
    float voltage = sensorValue * (3 / 1023.0);
    
    char test_sensor;
    if(voltage>=2){
      test_sensor = 'r';
      }
    else if(voltage>=1){
      test_sensor = 'b';
      }
    else if(voltage>=0){
      test_sensor = 'g';
      }
    //char test = mySerial.read();
    
    if(check != test_sensor){

      
    if(test_sensor == 'r')
    {
      Serial.print(test_sensor);
      check = test_sensor;
    }
    else if(test_sensor == 'b')
    {
      Serial.print(test_sensor);
      check = test_sensor;
    }
    else if(test_sensor == 'g')
    {
      Serial.print(test_sensor);
      check = test_sensor;
    }
    }
}


Code for the server:

# Imports
import time
import serial
from Tkinter import *

# Serial port parameters
serial_speed1 = 9600
serial_speed2 = 9600
serial_speed3 = 9600

serial_port1 = '/dev/tty.banana-DevB'
serial_port2 = '/dev/tty.HC-06-DevB'
serial_port3 = '/dev/tty.usbmodem1411'

ser1 = serial.Serial(serial_port1, serial_speed1, timeout=1)
ser2 = serial.Serial(serial_port2, serial_speed2, timeout=1)
ser3 = serial.Serial(serial_port3, serial_speed3, timeout=1)


colors=['r','b','g']
for i in range (3):
for j in range (3):
ser1.write(colors[j])
time.sleep(0.05)
ser2.write(colors[j])
time.sleep(0.05)

print("Ready!")

while 1:
data = ser3.read()
print(data)
ser1.write(data)
ser2.write(data)




After the crit Carolina and Lennart went to Kjell & Company to buy the rest of the material we needed to build two cubes. We bought one more Arduino Pro Micro, one RGB LED light, two 9V batteries and two batterie contacts.

By: Carolina, Lennart, Josefine, Julius