ESP32 BLE Beacon

Projects General Guidance
1

Good morning and Happy New Year.

I wonder if I could request some guidance/help.

I have programmed a ESP32 to act as a BLE Beacon, code below, I need to amend the code so the ESP32 transmits it BLE MAC address, could someone guide me as to how to do this. Many thanks Peter

Code
#include “sys/time.h”

#include “BLEDevice.h”

#include “BLEUtils.h”

#include “BLEServer.h”

#include “BLEBeacon.h”

#include “esp_sleep.h”

#define GPIO_DEEP_SLEEP_DURATION 5 // sleep x seconds and then wake up

RTC_DATA_ATTR static time_t last; // remember last boot in RTC Memory

RTC_DATA_ATTR static uint32_t bootcount; // remember number of boots in RTC Memory

// See the following for generating UUIDs:

// https://www.uuidgenerator.net/

BLEAdvertising *pAdvertising; // BLE Advertisement type

struct timeval now;

#define BEACON_UUID “87b99b2c-90fd-11e9-bc42-526af7764f64” // UUID 1 128-Bit (may use linux tool uuidgen or random numbers via https://www.uuidgenerator.net/ )

void setBeacon() {

BLEBeacon oBeacon = BLEBeacon();

oBeacon.setManufacturerId(0x4C00); // fake Apple 0x004C LSB (ENDIAN_CHANGE_U16!)

oBeacon.setProximityUUID(BLEUUID(BEACON_UUID));

oBeacon.setMajor((bootcount & 0xFFFF0000) >> 16);

oBeacon.setMinor(bootcount & 0xFFFF);

BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();

BLEAdvertisementData oScanResponseData = BLEAdvertisementData();

oAdvertisementData.setFlags(0x04); // BR_EDR_NOT_SUPPORTED 0x04

std::string strServiceData = “”;

strServiceData += (char)26; // Len

strServiceData += (char)0xFF; // Type

strServiceData += oBeacon.getData();

oAdvertisementData.addData(strServiceData);

pAdvertising->setAdvertisementData(oAdvertisementData);

pAdvertising->setScanResponseData(oScanResponseData);

}

void setup() {

Serial.begin(115200);

gettimeofday(&now, NULL);

Serial.printf(“start ESP32 %d\n”, bootcount++);

Serial.printf(“deep sleep (%lds since last reset, %lds since last boot)\n”, now.tv_sec, now.tv_sec - last);

last = now.tv_sec;

// Create the BLE Device

BLEDevice::init(“XC40 iBeacon”);

// Create the BLE Server

BLEServer *pServer = BLEDevice::createServer(); // ← no longer required to instantiate BLEServer, less flash and ram usage

pAdvertising = BLEDevice::getAdvertising();

BLEDevice::startAdvertising();

setBeacon();

// Start advertising

pAdvertising->start();

Serial.println(“Advertizing started…”);

delay(100);

pAdvertising->stop();

Serial.printf(“enter deep sleep\n”);

esp_deep_sleep(1000000LL * GPIO_DEEP_SLEEP_DURATION);

Serial.printf(“in deep sleep\n”);

}

void loop() {

}

2

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3 
#include "sys/time.h"

#include "BLEDevice.h"

#include "BLEUtils.h"

#include "BLEServer.h"

#include "BLEBeacon.h"

#include "esp_sleep.h"



#define GPIO_DEEP_SLEEP_DURATION     5  // sleep x seconds and then wake up

RTC_DATA_ATTR static time_t last;        // remember last boot in RTC Memory

RTC_DATA_ATTR static uint32_t bootcount; // remember number of boots in RTC Memory


// See the following for generating UUIDs:

// https://www.uuidgenerator.net/

BLEAdvertising *pAdvertising;   // BLE Advertisement type

struct timeval now;


#define BEACON_UUID "87b99b2c-90fd-11e9-bc42-526af7764f64" // UUID 1 128-Bit (may use linux tool uuidgen or random numbers via https://www.uuidgenerator.net/)


void setBeacon() {


  BLEBeacon oBeacon = BLEBeacon();

  oBeacon.setManufacturerId(0x4C00); // fake Apple 0x004C LSB (ENDIAN_CHANGE_U16!)

  oBeacon.setProximityUUID(BLEUUID(BEACON_UUID));

  oBeacon.setMajor((bootcount & 0xFFFF0000) >> 16);

  oBeacon.setMinor(bootcount & 0xFFFF);

  BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();

  BLEAdvertisementData oScanResponseData = BLEAdvertisementData();


  oAdvertisementData.setFlags(0x04); // BR_EDR_NOT_SUPPORTED 0x04


  std::string strServiceData = "";


  strServiceData += (char)26;     // Len

  strServiceData += (char)0xFF;   // Type

  strServiceData += oBeacon.getData();

  oAdvertisementData.addData(strServiceData);


  pAdvertising->setAdvertisementData(oAdvertisementData);

  pAdvertising->setScanResponseData(oScanResponseData);

}


void setup() {


  Serial.begin(115200);

  gettimeofday(&now, NULL);

  Serial.printf("start ESP32 %d\n", bootcount++);

  Serial.printf("deep sleep (%lds since last reset, %lds since last boot)\n", now.tv_sec, now.tv_sec - last);

  last = now.tv_sec;


  // Create the BLE Device

  BLEDevice::init("XC40 iBeacon");

  // Create the BLE Server

  BLEServer *pServer = BLEDevice::createServer(); // <-- no longer required to instantiate BLEServer, less flash and ram usage

  pAdvertising = BLEDevice::getAdvertising();

  BLEDevice::startAdvertising();

  setBeacon();

  // Start advertising

  pAdvertising->start();

  Serial.println("Advertizing started...");

  delay(100);

  pAdvertising->stop();

  Serial.printf("enter deep sleep\n");

  esp_deep_sleep(1000000LL * GPIO_DEEP_SLEEP_DURATION);

  Serial.printf("in deep sleep\n");

}


void loop() {

}
5

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