i'm workinng with oled and a dht11 . used some source code from this topic: https://forum.arduino.cc/t/my-1-3-oled-i2c-iic-is-not-working/1283040 from first my oled didnt work now the dht11 sensor is ust teling me the humidity and tempture is 255.00. pls help wuld be apresiated in any way. here is te code:
//********************************************^************************************************
// OLED_Counter.ino
//
// LarryD
// Version YY/MM/DD Comments
// ======= ======== ===============================================
// 1.00 22/04/21 Running code
//
//
//https://lastminuteengineers.com/oled-display-arduino-tutorial/
#include <Wire.h>
//#include <Adafruit_GFX.h>
//#include <Adafruit_SSD1306.h>
#include <Adafruit_SH110X.h>
/* Uncomment the initialize the I2C address , uncomment only one, If you get a totally blank screen try the other*/
#define i2c_Address 0x3c //initialize with the I2C addr 0x3C Typically eBay OLED's
//#define i2c_Address 0x3d //initialize with the I2C addr 0x3D Typically Adafruit OLED's
//********************************************^************************************************
const byte heartbeatLED = 13;
#define SCREEN_WIDTH 128 //OLED display width, in pixels
#define SCREEN_HEIGHT 64 //OLED display height, in pixels
//SSD1306 display
//size 1 is 5X7 pixels therefore, 6X8 to acount for spacing, 21 characters per line
//size 2 is 10X14 pixels therefore, 11X15 to account for spacing, 10 characters per line
//size 4 is 20X28 pixels therefore, 21X29 to account for spacing, 5 characters per line
//Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
//Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
#define OLED_RESET -1 // QT-PY / XIAO
Adafruit_SH1106G display = Adafruit_SH1106G(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#include <dht.h>
dht DHT;
#define DHT11_PIN 7
unsigned long counter = 0;
//timing stuff
unsigned long heartbeatTime;
unsigned long displayTime;
// s e t u p ( )
//********************************************^************************************************
//
void setup()
{
Serial.begin(115200);
pinMode(heartbeatLED, OUTPUT);
delay(250); // wait for the OLED to power up
display.begin(i2c_Address, true); // Address 0x3C default
display.display();
delay(2000);
// if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C))
// {
// Serial.println(F("SSD1306 allocation failed"));
// for (;;);
// }
display.clearDisplay();
//display.setTextColor(textColor, backgroundColor);
//display.setTextColor(WHITE, BLACK);
display.setTextSize(1);
display.setTextColor(SH110X_WHITE);
display.setCursor(0, 0);
} //END of setup()
// l o o p ( )
//********************************************^************************************************
//
void loop()
{
int chk = DHT.read11(DHT11_PIN);
//********************************* heartbeat TIMER
//is it time to toggle the heartbeatLED (every 500ms)?
if (millis() - heartbeatTime >= 500ul)
{
//restart this TIMER
heartbeatTime = millis();
//toggle the heartbeat LED
digitalWrite(heartbeatLED, digitalRead(heartbeatLED) == HIGH ? LOW : HIGH);
}
//********************************* displayTime TIMER
//is time to update the display ?
if (millis() - displayTime >= 250ul)
{
//restart this TIMER
displayTime = millis();
//clear SSD1306 display
display.clearDisplay();
//************************************
display.setTextSize(1);
display.setCursor(0, 0);
//Size 1 line is 000000000111111111122
//21 characters 123456789012345678901
//Example ..OLED Counter Demo..
display.print(" OLED Counter Demo ");
//************************************
//display.setCursor(0,9);
//Size 1 line is 000000000111111111122
//21 characters 123456789012345678901
//display.print ("ABCDEFGHIJKLMNOPQRSTU");
//************************************
display.setTextSize(2);
//2 = current text size, 16 is the pixel row we want to postion to
display.setCursor(centering(counter, 2), 15);
//Size 2 line 0000000001
//10 characters 1234567890
//Example 100000
display.print(counter++);
display.setTextSize(1);
display.setCursor(0,30);
display.print("Humidity (%): ");
display.print(DHT.humidity);
display.setCursor(0,40);
display.print("Temp (C): ");
display.print(DHT.temperature);
//************************************
//degree symbol
//using CP437 ASCII
//display.cp437(true);
//display.write(248);
//************************************
// display.setTextSize(2);
// display.setCursor(0,16);
// display.setCursor(0,32);
// //temperature
// //Size 2 line is 0000000001
// //10 characters 1234567890
// //Example ABCDEFGHIJ
// display.print("ABCDEFGHIJ");
//************************************
display.display();
}
//************************************
//other non blocking code goes here
//************************************
} //END of loop()
// c o u n t D i g i t s ( )
//********************************************^************************************************
//return the number of digits in a number
byte countDigits(int num)
{
byte count = 0;
while (num)
{
num = num / 10;
count++;
}
return count;
} //END of countDigits()
// g e t D i g i t ( )
//********************************************^************************************************
//return the selected digit
byte getDigit(unsigned int number, int digit)
{
for (int i = 0; i < digit - 1; i++)
{
number = number / 10;
}
return number % 10;
} //END of getDigit()
// c e n t e r i n g ( )
//********************************************^************************************************
//return the position to print the MSD
byte centering(unsigned long number, byte textSize)
{
byte count = 0;
byte charaterCellWidth = 0;
//a basic character is 5X7, we must scale for this text size
charaterCellWidth = (5 * textSize) + 1;
//number of digits in our number
while (number)
{
number = number / 10;
count++;
}
//center location where the MSD character will be displayed
return (SCREEN_WIDTH / 2 - (charaterCellWidth * count / 2));
} //END of centering()
//
