BLE_Scan.ino

#include <BLEAdvertisedDevice.h>
#include <BLEDevice.h>
#include <BLEScan.h>

const int PIN = 2;
const int CUTOFF = -60;

void setup() {
  pinMode(PIN, OUTPUT);
  BLEDevice::init("");
}

void loop() {
  BLEScan *scan = BLEDevice::getScan();
  scan->setActiveScan(true);
  BLEScanResults results = scan->start(1);
  int best = CUTOFF;
  for (int i = 0; i < results.getCount(); i++) {
    BLEAdvertisedDevice device = results.getDevice(i);
    int rssi = device.getRSSI();
    if (rssi > best) {
      best = rssi;
    }
  }
  digitalWrite(PIN, best > CUTOFF ? HIGH : LOW);
}

hello wybiral,
can you help me out, i am not a arduino coder.
i am stuck at this. In the code, the loop never stops.
I want to trigger 2 relays using BLE and also set
the activetion distance area to 5meters from the esp32 so that it
triggers only when the BLE device is 5mtrs away.when it is detected
i want it to stay on, while running the code the relay switches on and
off every 2 seconds. hope you would fix it for me.
Thanks Anand.
(the code is:)

#include <BLEDevice.h> //Header file for BLE

static BLEUUID serviceUUID("0000fff0-0000-1000-8000-00805f9b34fb");
static BLEUUID charUUID("0000fff0-0000-1000-8000-00805f9b34fb");
String My_BLE_Address = "c1:b4:70:74:fb:66";
static BLERemoteCharacteristic* pRemoteCharacteristic;

BLEScan* pBLEScan;
BLEScanResults foundDevices;

static BLEAddress *Server_BLE_Address;
String Scaned_BLE_Address;

boolean paired = false;
boolean chkConnet = false;

bool connectToserver (BLEAddress pAddress)
{

BLEClient*  pClient  = BLEDevice::createClient();
Serial.println(" - Created client");

// Connect to the BLE Server.
pClient->connect(pAddress);
Serial.println(" - Connected");
BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
if (pRemoteService != nullptr)
{
  Serial.println(" - Found our service");
  return true;
}
else
return false;

pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
if (pRemoteCharacteristic != nullptr)
  Serial.println(" - Found our characteristic");

  return true;

}

class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks
{
void onResult(BLEAdvertisedDevice advertisedDevice)
{
Serial.printf("Scan Result: %s \n", advertisedDevice.toString().c_str());
Server_BLE_Address = new BLEAddress(advertisedDevice.getAddress());
Scaned_BLE_Address = Server_BLE_Address->toString().c_str();
}
};

void setup()
{
Serial.begin(115200);
Serial.println("Project-4");

BLEDevice::init("");
pBLEScan = BLEDevice::getScan();
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());  
pBLEScan->setActiveScan(true); 

pinMode(12, OUTPUT);
pinMode(14, OUTPUT);
}

void loop()
{

foundDevices = pBLEScan->start(3);
Serial.println(chkConnet);
if(chkConnet == false)
{
while (foundDevices.getCount() >= 1)
{
if (Scaned_BLE_Address == My_BLE_Address && paired == false)
{
Serial.println("connecting .....");
if (connectToserver(Server_BLE_Address))
{
paired = true;
Serial.println("ON");
if(chkConnet == false)
{
digitalWrite (12,HIGH);
digitalWrite (14,HIGH);
chkConnet = true;
Serial.println("On");
}
break;
}
else
{
Serial.println("Pairing failed");
break;
}
}
break;
}
}
while (foundDevices.getCount() == 0)
{
Serial.println("**************");
Serial.println(foundDevices.getCount());

  Serial.println("out of range");
  paired = false;
 
  if(chkConnet == true)
  {
  digitalWrite (12,LOW);
  digitalWrite (14,LOW);
  chkConnet = false;
  Serial.println("OFF");
  }
  ESP.restart();
  break;    

}
}

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