hi! i'm working on a project to determine the concentration of iron using a TC3200 color sensor. I've managed to get that working after calibrating but I am having difficulty integrating that code into a code with a menu. i am able to upload the final code without any error but it doesn't seem to display the concentration values on my LCD. everything else works fine and is printed on the lcd.
*the codes for the menu and color sensor work fine on their own but not together
materials used:
tc3200 color sensor
16x2 LCD i2c
rotary encoder
arduino mega (a clone but I've downloaded the drivers)
functions:
- menu: (single-level) consists of 6 items (one of which will trigger the LCD to start printing the concentration values).
- color sensor used to detect iron concentrations
- basic settings (volume, power mode)
I'm a newbie and I'm not sure where i went wrong
so any advice or help would be appreciated, thanks!
here's my code:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 16, 2);
// rotary encoder inputs
#define Clock 9 //clock pin connected to D9
#define Data 8 //data pin connected to D8
#define Push 10 //push button pin connected to D10
#define S0 4 // S0 to pin 4
#define S1 5 // S1 to pin 5
#define S2 6 // S2 to pin 6
#define S3 7 // S3 to pin 7
#define sensorOut 11 // OUT to pin 11
int counter = 1; //use this variable to store "steps"
int currentStateClock; //store the status of the clock pin (HIGH or LOW)
int lastStateClock; //store the PREVIOUS status of the clock pin (HIGH or LOW)
String currentDir = ""; //use this to print text
unsigned long lastButtonPress = 0; //use this to store if the push button was pressed or not
int pushed = 0; // create variable pushed to count when the button has been pushed
int menu = 0; // create variable to count menu
// variables for color sensor
float inv_green;
int frequency = 0;
float concentration = 0.0000;
void updateMenu() {
switch (menu) {
case 0:
menu = 1;
break;
case 1:
lcd.clear();
lcd.print("> Start");
lcd.setCursor(0, 1);
lcd.print(" Patient Details");
break;
case 2:
lcd.clear();
lcd.print(" Start");
lcd.setCursor(0, 1);
lcd.print("> Patient Details");
break;
case 3:
lcd.clear();
lcd.print("> Power Mode");
lcd.setCursor(0, 1);
lcd.print(" Volume");
break;
case 4:
lcd.clear();
lcd.print(" Power Mode");
lcd.setCursor(0, 1);
lcd.print("> Volume");
break;
case 5:
menu = 4;
break;
}//switch menu
}//void updatemenu
void Enterdetails() {
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Please Enter");
lcd.setCursor(0, 1);
lcd.print("Patient ID: ");
}// void enterdetails
void concentrationDetector() {
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Please wait...");
delay(1000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Detecting...");
delay(1000);
// printing concentration of iron on I2C LCD
lcd.clear();
lcd.setCursor(0, 0); // move cursor to (0, 0)
lcd.print("Concentration"); // print message at (0, 0)
lcd.setCursor(0, 1); // move cursor to (0, 1)
lcd.print(concentration); // print message at (0, 1)
}// void concentration detector
void powerMode() {
lcd.clear();
lcd.print("Executing...");
delay(1500);
//code for power mode
} // void power
void adjustVolume() {
lcd.clear();
lcd.print("Executing...");
delay(1500);
//code for volume
} // void adjust volume
void executeAction1() {
switch (menu) {
case 1:
concentrationDetector();
break;
case 2:
Enterdetails();
break;
case 3:
powerMode();
break;
case 4:
adjustVolume();
break;
}// switch menu
}//void action 1
void setup() {
lcd.init();
lcd.backlight();
pinMode(Clock, INPUT_PULLUP);// clock, input pullup
pinMode(Data, INPUT_PULLUP); // data, input pullup
pinMode(Push, INPUT_PULLUP); // push, input pullup
updateMenu();
pinMode(S0, OUTPUT);
pinMode(S1, OUTPUT);
pinMode(S2, OUTPUT);
pinMode(S3, OUTPUT);
// Setting the sensorOut as an input
pinMode(sensorOut, INPUT);
// Setting frequency-scaling to 20%
digitalWrite(S0, HIGH);
digitalWrite(S1, LOW);
lcd.clear();
lcd.setCursor(0, 0); // move cursor to (0, 0)
lcd.print("Setup "); // print message at (0, 0)
lcd.setCursor(0, 1); // move cursor to (0, 1)
lcd.print("Initiating"); // print message at (0, 1)
delay(2000);
lcd.clear();
lcd.setCursor(0, 0); // move cursor to (0, 0)
lcd.print("Setup ");// print message at (0, 0)
lcd.setCursor(0, 1); // move cursor to (0, 1)
lcd.print("Initiated"); // print message at (0, 1)
delay(2000);
Serial.begin(9600);
}
void loop()
{
counter = constrain(counter, -1, 4);
// Read the current state of CLK
currentStateClock = digitalRead(Clock);
if (currentStateClock != lastStateClock && currentStateClock == 1) {
if (digitalRead(Data) != currentStateClock) {
updateMenu();
menu++;
counter ++;
currentDir = "Counterclockwise";
} else {
// Encoder is rotating CW so increment
updateMenu();
menu--;
counter --;
currentDir = "Clockwise";
}
Serial.print("Direction: ");
Serial.print(currentDir);
Serial.print(" | Counter: ");
Serial.println(counter);
}
// We save last Clock state for next loop
lastStateClock = currentStateClock;
// Read the button state
int btnState = digitalRead(Push);
//If we detect LOW signal, button is pressed
if (btnState == LOW) {
//if 50ms have passed since last LOW pulse, it means that the
//button has been pressed, released and pressed again
if (millis() - lastButtonPress > 50) {
Serial.println("Button pressed!");
executeAction1();
}
// Remember last button press event
lastButtonPress = millis();
}
// Put in a slight delay to help debounce the reading
delay(1);
// Setting Red filtered photodiodes to be read
digitalWrite(S2, LOW);
digitalWrite(S3, LOW);
// Reading the output frequency
frequency = pulseIn(sensorOut, LOW);
//Remaping the value of the frequency to the RGB Model of 0 to 255
frequency = map(frequency, 1985,1985, 255, 0);
// Printing the value on the serial monitor
Serial.print("R= ");//printing name
Serial.print(frequency);//printing RED color frequency
Serial.print(" ");
delay(100);
// Setting Green filtered photodiodes to be read
digitalWrite(S2, HIGH);
digitalWrite(S3, HIGH);
// Reading the output frequency
frequency = pulseIn(sensorOut, LOW);
//Remaping the value of the frequency to the RGB Model of 0 to 255
frequency = map(frequency, 2187,2236, 255, 0);
// Printing the value on the serial monitor
Serial.print("G= ");//printing name
Serial.print(frequency);//printing GREEN color frequency
Serial.print(" ");
delay(100);
// putting our inverse green values to our equation
inv_green = 1.0000 / frequency ;
Serial.print("inverse green= ");//printing name
Serial.print(inv_green,7);//printing RED color frequency
Serial.print(" ");
delay(100);
concentration = (inv_green - 0.0039) / (5 * pow(10, -5)); // here frequency is Red filtered photodiodes Value
//printing concentration
Serial.print("Concentration= ");
Serial.print(concentration,5);
Serial.print(" ");
delay(100);
// Setting Blue filtered photodiodes to be read
digitalWrite(S2, LOW);
digitalWrite(S3, HIGH);
// Reading the output frequency
frequency = pulseIn(sensorOut, LOW);
//Remaping the value of the frequency to the RGB Model of 0 to 255
frequency = map(frequency, -900, -885, 255, 0);
// Printing the value on the serial monitor
Serial.print("B= ");//printing name
Serial.print(frequency);//printing BLUE color frequency
Serial.println(" ");
delay(100);
}
unfortunately, there isn't anything showing up on my serial monitor except for the things I wanted to be printed for the rotary encoder.