Don Luc Electronics
The Alpha Geek – Geeking Out

Project #11: ESP32 – Bluetooth IoT – Mk12

Published January 5, 2025 | By DonLuc

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#DonLucElectronics #DonLuc #ESP32 #Bluetooth #Elecrow #DFRobot #Arduino #Project #Patreon #Electronics #Microcontrollers #IoT #Fritzing #Programming #Consultant

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Bluetooth IoT

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Bluetooth IoT

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Bluetooth IoT

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Bluetooth

Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks. In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres. It employs UHF radio waves in the ISM bands, from 2.402 GHz to 2.48 GHz.

You can pair all kinds of Bluetooth devices with your PC, including keyboards, mice, phones, speakers, IoT, and a whole lot more. To do this, your PC needs to have Bluetooth. Some PCs, such as laptops and tablets, have Bluetooth built in. If your PC doesn’t, you can plug a USB Bluetooth adapter into the USB port on your PC to get it.

DL2501Mk01

1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: 2.0″ 320×240 IPS TFT LCD
1 x GDL Line 10 CM
1 x Crowtail- Rotary Angle Sensor 2.0 – 10K Ohm
1 x Crowtail- LED 2.0 – Yellow
1 x Crowtail- LED 2.0 – Green
1 x Lithium Ion Battery – 1000mAh
1 x Switch
1 x Bluetooth Serial Terminal for Windows 10
1 x USB 3.1 Cable A to C

FireBeetle 2 ESP32-E

POT – A0
LEG – 16
LEY – 17
DC – D2
CS – D6
RST – D3
RX2 – Bluetooth
TX2 – Bluetooth
VIN – +3.3V
GND – GND

DL2501Mk01p

DL2501Mk01p.ino

/****** Don Luc Electronics © ******
Software Version Information
Project #11: ESP32 - Bluetooth IoT - Mk12
11-12
DL2501Mk01p.ino
DL2501Mk01
1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: 2.0" 320x240 IPS TFT LCD
1 x GDL Line 10 CM
1 x Crowtail- Rotary Angle Sensor 2.0 - 10K Ohm
1 x Crowtail- LED 2.0 - Yellow
1 x Crowtail- LED 2.0 - Green
1 x Lithium Ion Battery - 1000mAh
1 x Switch
1 x Bluetooth Serial Terminal for Windows 10
1 x USB 3.1 Cable A to C
*/

// Include the Library Code
// Arduino
#include <Arduino.h>
// Wire
#include <Wire.h>
// DFRobot Display GDL API
#include <DFRobot_GDL.h>
// Bluetooth Serial
#include "BluetoothSerial.h"
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif

// Bluetooth Serial
BluetoothSerial SerialBT;

// Defined ESP32
#define TFT_DC  D2
#define TFT_CS  D6
#define TFT_RST D3

/*dc=*/ /*cs=*/ /*rst=*/
// DFRobot Display 240x320
DFRobot_ST7789_240x320_HW_SPI screen(TFT_DC, TFT_CS, TFT_RST);

// Potentiometer
int iPot = A0;
int iPotVal = 0;
// Change Your Threshold Here
int Threshold = 2000;
// Full String
String FullString = "";

// LED Yellow
int iLEDY = 17;

// LED Green
int iLEDG = 16;

// Software Version Information
String sver = "11-12";

void loop() {

  // Potentiometer
  isPotentiometer();

  // Delay 2 Second
  delay( 2000 );

}

getDisplay.ino

// DFRobot Display 240x320
// DFRobot Display 240x320 - UID
void isDisplayUID(){

  // DFRobot Display 240x320
  // Text Display
  // Text Wrap
  screen.setTextWrap(false);
  // Rotation
  screen.setRotation(3);
  // Fill Screen => black
  screen.fillScreen(0x0000);
  // Text Color => white
  screen.setTextColor(0xffff);
  // Font => Free Mono 9pt
  screen.setFont(&FreeMono9pt7b);
  // TextSize => 1.5
  screen.setTextSize(1.5);
  // DFRobot Display
  screen.setCursor(0, 30);
  screen.println("Don Luc Electronics");
  // Don Luc Electronics
  screen.setCursor(0, 60);
  screen.println("DFRobot Display");
  // Version
  screen.setCursor(0, 90);
  screen.println("Version");
  screen.setCursor(0, 120);
  screen.println( sver );

}
// isDisplay Green
void isDisplayG(){

  // DFRobot Display 240x320
  // Text Display
  // Text Wrap
  screen.setTextWrap(false);
  // Rotation
  screen.setRotation(3);
  // Fill Screen => black
  screen.fillScreen(0x0000);
  // Text Color => white
  screen.setTextColor(0xffff);
  // Font => Free Mono 9pt
  screen.setFont(&FreeMono9pt7b);
  // TextSize => 1.5
  screen.setTextSize(1.5);
  // Don Luc Electronics
  screen.setCursor(0, 30);
  screen.println("Don Luc Electronics");
  // LED Yellow
  screen.setCursor(0, 60);
  screen.println("LED Green");
  // Potentiometer Value
  screen.setCursor(0, 90);
  screen.println( iPotVal );

}
// isDisplay Yellow
void isDisplayY(){

  // DFRobot Display 240x320
  // Text Display
  // Text Wrap
  screen.setTextWrap(false);
  // Rotation
  screen.setRotation(3);
  // Fill Screen => black
  screen.fillScreen(0x0000);
  // Text Color => white
  screen.setTextColor(0xffff);
  // Font => Free Mono 9pt
  screen.setFont(&FreeMono9pt7b);
  // TextSize => 1.5
  screen.setTextSize(1.5);
  // Don Luc Electronics
  screen.setCursor(0, 30);
  screen.println("Don Luc Electronics");
  // LED Yellow
  screen.setCursor(0, 60);
  screen.println("LED Yellow");
  // Potentiometer Value
  screen.setCursor(0, 90);
  screen.println( iPotVal );

}

getPotentiometer.ino

// Potentiometer
// Potentiometer
void isPotentiometer(){

  // Connect Potentiometer to Analog 0
  iPotVal = analogRead( iPot );

  // Threshold
  if (iPotVal > Threshold) {

    // LED Yellow
    digitalWrite(iLEDY, LOW);
    // isDisplay Green
    isDisplayG();
    // LED Green
    digitalWrite(iLEDG, HIGH);
    // FullString
    FullString = "LED Green = " + String(iPotVal) + "\r\n";
  
  }
  else {
    
    // LED Green
    digitalWrite(iLEDG, LOW);
    // isDisplay Yellow
    isDisplayY();
    // LED Yellow
    digitalWrite(iLEDY, HIGH);
    // FullString
    FullString = "LED Yellow = " + String(iPotVal) + "\r\n";
    
  }

  // FullString Bluetooth Serial + Serial
  for(int i = 0; i < FullString.length(); i++)
  {

    // Bluetooth Serial
    SerialBT.write(FullString.c_str()[i]);
    // Serial
    Serial.write(FullString.c_str()[i]);
    
  }

}

setup.ino

// Setup
void setup()
{
 
  // Serial Begin
  Serial.begin(115200);
  Serial.println("Starting BLE work!");

  // Bluetooth Serial
  SerialBT.begin("Don Luc Electronics");
  Serial.println("Bluetooth Started! Ready to pair...");
  
  // Delay
  delay(100);

  // DFRobot Display 240x320
  screen.begin();

  // Delay
  delay(100);

  // Initialize the LED Yellow
  pinMode(iLEDY, OUTPUT);

  // Initialize the LED Green
  pinMode(iLEDG, OUTPUT);

  // DFRobot Display 240x320 - UID
  // Don Luc Electronics
  // Version
  isDisplayUID();

  // Delay 5 Second
  delay( 5000 );

}

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People can contact us: https://www.donluc.com/?page_id=1927

Electronics, IoT, Teacher, Instructor, R&D and Consulting

  • Programming Language
  • Single-Board Microcontrollers (PIC, Arduino, Raspberry Pi, Arm, Silicon Labs, Espressif, Etc…)
  • IoT
  • Wireless (Radio Frequency, Bluetooth, WiFi, Etc…)
  • Robotics
  • Automation
  • Camera and Video Capture Receiver Stationary, Wheel/Tank and Underwater Vehicle
  • Unmanned Vehicles Terrestrial and Marine
  • Machine Learning
  • Artificial Intelligence (AI)
  • RTOS
  • Sensors, eHealth Sensors, Biosensor, and Biometric
  • Research & Development (R & D)
  • Consulting

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https://www.donluc.com/luc/

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Don Luc

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