[ESP32 xBee EVM] Arduino I2C 테스트 - OLED SSD1306 에 IP 출력하기

 

[xBee EXP EVM] 보드를 이용하여 테스트 하였다.

 

 

ESP32의 WiFi 연결시 할당 받은 IP Address를 OLED (SSD1306) 에 표시 하기

#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)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define NUMFLAKES     10 // Number of snowflakes in the animation example


#include <WiFi.h>

const char *ssid = "****";
const char *password = "****";

WiFiServer server(80);

void setup() {

  	Serial.begin(115200);

	Serial.print("Connecting to ");
  	Serial.println(ssid);
  	WiFi.begin(ssid, password);
  	while (WiFi.status() != WL_CONNECTED) 
    {
    	delay(500);
    	Serial.print(".");
  	}
  
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    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();

    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(0,0);
    display.println("nexp.tistopry.com");
    display.println(" ");
    display.setTextColor(INVERSE);
    display.setTextSize(2);
    display.println("SSD1306");
    display.println(" ");
    display.println(WiFi.localIP());

	display.display();
}

void loop() {
delay(250);
}