ESP32 BLE Classic

ESp32 wroom + serial Bluetooth terminal + SSD1206 Oled

Circuit diagram

Download Application

Libraries

#include “BluetoothSerial.h” // for bluetooth

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h> //for oled

Code:

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include “BluetoothSerial.h”

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define SCREEN_ADDRESS 0x3C
#define OLED_RESET -1

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

BluetoothSerial SerialBT;

char message,arr[] = “PavanBT”,arr2[100];
bool isConnected = false;

void setup() {
Serial.begin(115200);

if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
Serial.println(F(“SSD1306 allocation failed”));
for (;;);
}
display.clearDisplay();

if (!SerialBT.begin(“pavanBT”)) {
display.println(“BT Disconnected”);
}
else {
isConnected = true;
display.setTextColor(WHITE);
display.setCursor(0, 24);
display.setTextSize(2);
display.print(“BT Begin”);
display.display();
delay(200);
display.clearDisplay();

}
}
int i = 0;
void loop() {
if (isConnected) {
if (!Serial.available()) {
Serial.println(“Not Available”);
}
else {

message = SerialBT.read();
arr2[i] = message;
Serial.print(message);
i++;
}
//display.display();
delay(200);
}
display.setTextColor(WHITE);
display.setCursor(10,0);
display.print(arr);

display.setCursor(0, 24);
display.setTextSize(2);
display.print(arr2);
display.display();

delay(200);

}