Digital telegraph using ESP32, Arduino compatible

Components

• Adafruit SSD1306 128x64 I2C (4 pins), if you have a different display, change in the lines 13 and 14.
• A button.

Configuration

• WiFi:

  • Change the ssid and password in lines 10 and 11.

• Display (optional):

  • Change the SCREEN_ADDRESS in line 13.
  • Change the displayWidth and displayHeight in line 14.

• Button (optional):

  • Change the BUTTON_PIN in line 16.

Connections

Display:

• GND to GND,
• VCC to 3.3V or 5V
• SCL and SDA pins (these are defined by Wire lib):
  ESP32: SDA on D21, SCL on D22;
  Arduino UNO: SDA on A4, SCL on A5;
  Arduino MEGA 2560: SDA on 20, SCL on 21;
  Arduino LEONARDO: SDA on 2, SCL on 3;

Button: between GND and D23.