Arduino Nano X2 ATmega328P Display Klon Udviklingsboard

Arduino Nano X2 ATmega328P Display Klon Udviklingsboard er en kombination af en Arduino Nano mikrocontrollerenhed og et OLED-display, der er designet til at fungere sammen i forskellige elektroniske projekter. Arduino Nano er en kompakt og alsidig mikrocontrollerenhed baseret på ATmega328P-chippen. Den har et lignende sæt funktioner som Arduino Uno, men i en mindre formfaktor. Den kan programmeres ved hjælp af Arduino IDE og bruges til at styre forskellige elektroniske enheder og sensorer. OLED-displayet i denne kombination er normalt tilsluttet til Arduino Nano via I2C (Inter-Integrated Circuit) kommunikationsprotokol.

Tekniske detaljer:

Microcontroller: ATmega328P
Serial chip: CH340C
Operating Voltage: 5V
Input Voltage: 5-12V
Digital I/O Pins: 14 (of which 6 provide PWM output)
Analog Input Pins: 8
DC Current per I/O Pin: 40 mA
DC Current for 3.3V Pin: 50 mA
Flash Memory: 32 KB (ATmega328) of which 2 KB used by bootloader
SRAM: 2 KB (ATmega328)
EEPROM: 1 KB (ATmega328)
Clock Speed: 16 Hz

Display:
Text Color: White
Screen Size: 0.91 inch (diagonal)
Number of Pixels: 128×32 pixel resolution with 160° viewing angle
Interface: I2C
Driver IC: SSD1306

Board & Display connection pins:

• Nano 5V -> OLED VCC
• Nano GND -> OLED GND
• Nano A4 -> OLED SDA
• Nano A5 -> OLED SCL

#include <Wire.h> 
 
void setup()
{
  Wire.begin();
 
  Serial.begin(9600);
  while (!Serial);             //  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++ )
  {
    // The i2c_scanner uses the return value of
    // the Write.endTransmisstion to see if
    // a device did acknowledge to the 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 foundn");
  else
    Serial.println("donen");
 
  delay(5000);           // wait 5 seconds for next scan
}

Kode (Programmering)

Nu har jeg fundet adressen på displayet. Min er “0x3C”

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
//#include <Adafruit_BME280.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels

#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128×64, 0x3C for 128×32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup()
{
Serial.begin(9600);

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS))
{
Serial.println(F(“SSD1306 allocation failed”));
for (;;); // Don’t proceed, loop forever
}
// Show initial display buffer contents on the screen —
// the library initializes this with an Adafruit splash screen.
display.display();
delay(2000); // Pause for 2 seconds

// Clear the buffer
display.clearDisplay();

// Draw a single pixel in white
display.drawPixel(10, 10, SSD1306_WHITE);

// Show the display buffer on the screen. You MUST call display() after
// drawing commands to make them visible on screen!
display.display();
delay(2000);
testdrawstyles(); // Draw ‘stylized’ characters
}

void loop()
{
}

void testdrawstyles(void)
{
display.clearDisplay();
display.setTextSize(1); // Normal 1:1 pixel scale
display.setTextColor(SSD1306_WHITE); // Draw white text
display.setCursor(0, 0); // Start at top-left corner
display.println(F(“Hello, world!”));

display.setTextColor(SSD1306_WHITE);
//(SSD1306_BLACK, SSD1306_WHITE); // Draw ‘inverse’ text
display.println(3.141592, 6); //6-digit after decimal point

display.setTextSize(2); // Draw 2X-scale text
display.setTextColor(SSD1306_WHITE);
display.print(F(“0x”)); display.println(0xDEADBEEF, HEX);

display.display();
delay(2000);
}

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