Project #29 – DFRobot – Fermion BLE Sensor Beacon – Mk03

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#DonLucElectronics #DonLuc #DFRobot #FermionBLESensorBeacon #AmbientLight #FireBeetle2ESP32E #ESP32 #IoT #Arduino #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant

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Fermion: BLE Sensor Beacon

BLE Beacon, also known as Low Energy Bluetooth Beacon, is a small wireless device that broadcasts signals using BLE technology. Due to its broadcast nature, pairing is not required between the beacon and receiving devices. Each beacon contains a unique identifier, detectable by nearby devices equipped with Bluetooth technology, such as ESP32 and smartphones supporting BLE scanning.

This Bluetooth beacon has a built-in 11-bit ADC, Fermion version, and multiple I/Os that can be multiplexed to SDA/SCL while broadcasting over Bluetooth. Users can access sensor data within broadcast range on a Bluetooth-equipped device such as a Smartphone or ESP32. This BLE beacon has a built-in 11-bit ADC and an I2C interface, allowing it to real-time collect and broadcast data from various types of sensors, including analog, digital, and I2C sensors.

DL2402Mk03

1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: BLE Sensor Beacon
1 x Gravity: Analog Ambient Light Sensor
1 x CR2032 Coin Cell Battery
1 x 1 x Lithium Ion Battery – 1000mAh
1 x Rocker Switch – SPST
1 x Resistor 10K Ohm
1 x SparkFun Serial Basic Breakout – CH340G
1 x SparkFun Cerberus USB Cable
1 x USB 3.1 Cable A to C

DFRobot FireBeetle 2 ESP32-E

LED – 2
RSW – 17
VIN – +3.3V
GND – GND

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DL2402Mk03p.ino

/****** Don Luc Electronics © ******
Software Version Information
Project #29 - DFRobot -  - Mk03
29-03
DL2402Mk03p.ino
1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: BLE Sensor Beacon
1 x Gravity: Analog Ambient Light Sensor
1 x CR2032 Coin Cell Battery
1 x 1 x Lithium Ion Battery - 1000mAh
1 x Rocker Switch - SPST
1 x Resistor 10K Ohm
1 x SparkFun Serial Basic Breakout - CH340G
1 x SparkFun Cerberus USB Cable
1 x USB 3.1 Cable A to C
*/

// Include the Library Code
// Bluetooth LE keyboard
#include <BleKeyboard.h>
// Arduino
#include <Arduino.h>
// BLE Device
#include <BLEDevice.h>
// BLE Utils
#include <BLEUtils.h>
// BLEScan
#include <BLEScan.h>
// BLE Advertised Device
#include <BLEAdvertisedDevice.h>
// BLE Eddystone URL
#include <BLEEddystoneURL.h>
// BLE Eddystone TLM
#include <BLEEddystoneTLM.h>
// BLE Beacon
#include <BLEBeacon.h>

// ENDIAN_CHANGE
#define ENDIAN_CHANGE_U16(x) ((((x)&0xFF00) >> 8) + (((x)&0xFF) << 8))

// Bluetooth LE Keyboard
BleKeyboard bleKeyboard;
String sKeyboard = "";
// Send Size
byte sendSize = 0;

// Gravity: Analog Ambient Light Sensor
float Sensor_Data;
// In seconds
int scanTime = 5;
// BLE Scan
BLEScan *pBLEScan;

// My Advertised Device Callbacks
class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks
{

    // onResult
    void onResult(BLEAdvertisedDevice advertisedDevice)
    {
      // Advertised Device
      if (advertisedDevice.haveName())
      {
        // Name: Fermion: Sensor Beacon
        if(String(advertisedDevice.getName().c_str()) == "Fermion: Sensor Beacon"){
          
          // strManufacturerData
          std::string strManufacturerData = advertisedDevice.getManufacturerData();
          uint8_t cManufacturerData[100];
          strManufacturerData.copy((char *)cManufacturerData, strManufacturerData.length(), 0);
          
          // strManufacturerData.length
          for (int i = 0; i < strManufacturerData.length(); i++)
          {

             // cManufacturerData[i]
             cManufacturerData[i];
             
          }

          // Sensor_Data
          Sensor_Data = int(cManufacturerData[2]<<8 | cManufacturerData[3]);
   
        }        
      }
    }
};

// The number of the Rocker Switch pin
int iSwitch = 17;
// Variable for reading the button status
int SwitchState = 0;

// Define LED
int iLED = 2;

// Software Version Information
String sver = "29-03";

void loop() {

  // ScanResults
  isBLEScanResults();

  // Gravity: Analog Ambient Light Sensor
  isAmbientLight();

  // Read the state of the Switch value:
  SwitchState = digitalRead(iSwitch);

  // Check if the button is pressed. If it is, the SwitchState is HIGH:
  if (SwitchState == HIGH) {

    // Bluetooth LE Keyboard
    isBluetooth();

  }
  
  // Delay 2 Second
  delay(2000);

}

getAmbientLight.ino

// Gravity: Analog Ambient Light Sensor
// Ambient Light
void isAmbientLight(){

  // bleKeyboard
  // DFR|Version|Lux|*
  // SData => 1~6000 Lux
  float SData = map(Sensor_Data, 1, 3000, 1, 6000);
  sKeyboard = "DFR|" + sver + "|" + String(SData) + "|*";

}

getBLEScan.ino

// getBLEScan
// Setup BLE Scan
void isSetupBLEScan(){

  // BLE Device
  BLEDevice::init("");
  // Create new scan
  pBLEScan = BLEDevice::getScan();
  // Set Advertised Device Callbacks
  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
  // Active scan uses more power, but get results faster
  pBLEScan->setActiveScan(true);
  // Set Interval
  pBLEScan->setInterval(100);
  // Less or equal setInterval value
  pBLEScan->setWindow(99);
  
}
// BLE Scan Results
void isBLEScanResults(){

  // Put your main code here, to run repeatedly:
  BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
  // Delete results fromBLEScan buffer to release memory
  pBLEScan->clearResults();
  
}

getBleKeyboard.ino

// Ble Keyboard
// Bluetooth
// isBluetooth
void isBluetooth() {

  // ESP32 BLE Keyboard
  if(bleKeyboard.isConnected()) {

    // Send Size Length
    sendSize = sKeyboard.length();

    // Send Size, charAt
    for(byte i = 0; i < sendSize+1; i++){

       // Write
       bleKeyboard.write(sKeyboard.charAt(i));
       delay(50);
    
    }
    bleKeyboard.write(KEY_RETURN);

  }

}

setup.ino

// Setup
void setup()
{

  // Give display time to power on
  delay(100);

  // Bluetooth LE keyboard
  bleKeyboard.begin();

  // Give display time to power on
  delay(100);

  // Setup BLE Scan
  isSetupBLEScan();
  
  // Initialize the Switch pin as an input
  pinMode(iSwitch, INPUT);
  
  // Initialize digital pin iLED as an output
  pinMode(iLED, OUTPUT);
  // Outputting high, the LED turns on
  digitalWrite(iLED, HIGH);

  // Delay 5 Second
  delay( 5000 );

}

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