I read a value from bluetooth(works) and put it from char c into int mins1/mins2/hours3/hours4 (and converting it OF COURSE) and when I print it after putting it in inside a if statement it seems to be there. but when I try to display it on the display nothing shows up(the value does not get updated) so I checked and the value seems to be erased by the time I ask for it in the display section most below, why is that? how do I fix that???
here is my code:
#include <SoftwareSerial.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library.
// On an arduino UNO: A4(SDA), A5(SCL)
// On an arduino MEGA 2560: 20(SDA), 21(SCL)
// On an arduino LEONARDO: 2(SDA), 3(SCL), ...
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
SoftwareSerial mySerial(2,3);
String readString = "";
char c;
int mins1 = 0;
int mins2 = 0;
int hours3 = 0;
int hours4 = 0;
bool pastmins1 = false;
bool pasthours3 = false;
bool pastmins2 = false;
bool pasthours4 = false;
String displayoled = "";
void setup()
{
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
mySerial.begin(9600);
Serial.begin(9600);
display.clearDisplay();
display.setTextSize(2); // Normal 1:1 pixel scale
display.setTextColor(SSD1306_WHITE); // Draw white text
display.setCursor(0,10); // Start at top-left corner
display.println(F("Power on"));
display.display();
}
void loop()
{
while (mySerial.available()) {
delay(10); //small delay to allow input buffer to fill
c = mySerial.read(); //gets one byte from serial buffer
if(pastmins1){
mins1 = c-'0';
pastmins1 = false;
Serial.println(mins1);
Serial.println(mins2);
Serial.println(hours3);
Serial.println(hours4);
}
else if(pastmins2){
mins2 = c-'0';
pastmins2 = false;
Serial.println(mins1);
Serial.println(mins2);
Serial.println(hours3);
Serial.println(hours4);
}
else if(pasthours3){
hours3 = c-'0';
pasthours3 = false;
Serial.println(mins1);
Serial.println(mins2);
Serial.println(hours3);
Serial.println(hours4);
}
else if(pasthours4){
hours4 = c-'0';
pasthours4 = false;
Serial.println(mins1);
Serial.println(mins2);
Serial.println(hours3);
Serial.println(hours4);
}
else{
readString += c;
}
if(readString == 'reset'){
mins1 = 0;
mins2 = 0;
hours3 = 0;
hours4 = 0;
}
if(readString == "setmins1"){
pastmins1 = true;
readString="";
}
if(readString == "setmins2"){
pastmins2 = true;
readString="";
}
if(readString == "sethours3"){
pasthours3 = true;
readString="";
}
if(readString == "sethours4"){
pasthours4 = true;
readString="";
}
} //makes the string readString
if (readString.length() > 0) {
display.clearDisplay();
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(0, 0);
// Display static text
display.println(readString);
display.setCursor(0, 40);
displayoled += mins1;
displayoled += mins2;
char d = ':';
displayoled += d;
displayoled += hours3;
displayoled += hours4;
display.println(displayoled);
display.display();
displayoled = "";
readString=""; //clears variable for new input
}
}