vidéo
Le schéma
la résistance est de 4,7 KΩ
Trouver l'adresse i2c de l’écran oled
#include <Wire.h>
void setup()
{
Wire.begin();
Serial.begin(9600);
while (!Serial); // Leonardo: wait for serial monitor
Serial.println("\nI2C Scanner");
}
void loop()
{
byte error, address;
int nDevices;
Serial.println("Scanning...");
nDevices = 0;
for (address = 1; address < 127; address++ )
{
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0)
{
Serial.print("I2C device found at address 0x");
if (address < 16)
Serial.print("0");
Serial.print(address, HEX);
Serial.println(" !");
nDevices++;
}
else if (error == 4)
{
Serial.print("Unknown error at address 0x");
if (address < 16)
Serial.print("0");
Serial.println(address, HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("done\n");
delay(5000); // wait 5 seconds for next scan
} Le code
//----------------------------------------------
// GammaTroniques
// By Xmow
// 08/2020
//----------------------------------------------
//Library
#include <OneWire.h>
#include <DallasTemperature.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeSansBold18pt7b.h>
//Taille de l'ecran OLED
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#define ONE_WIRE_BUS 2 //Pin de la sonde DS18B20
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
DeviceAddress tempDeviceAddress;
double temp;
String d;
void setup(void)
{
Serial.begin(9600);
sensors.begin();
sensors.setResolution(tempDeviceAddress, 12);
if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { //i2c adress oled display
Serial.println(F("SSD1306 allocation failed")); //Error display
}
display.clearDisplay();
display.display();
}
void loop(void)
{
Serial.print("Requesting temperatures...");
sensors.requestTemperatures();
Serial.println("DONE");
Serial.print("Temperature: ");
temp = sensors.getTempCByIndex(0);
Serial.println(temp, 5);
display.clearDisplay();
display.setTextSize(1);
display.setFont(&FreeSansBold18pt7b);
display.setTextColor(SSD1306_WHITE);
display.setCursor(0, 46);
d = temp;
d.replace(".", ",");
display.print(d);
display.print(" C");
display.drawCircle(90, 26, 4, SSD1306_WHITE);
display.drawCircle(90, 26, 3, SSD1306_WHITE);
display.display();
}