Prvni ulozeni z chegewara githubu

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/*
BLE5 extended scan example for esp32 C3 and S3
with this code it is simple to scan legacy (BLE4) compatible advertising,
and BLE5 extended advertising. New coded added in BLEScan is not changing old behavior,
which can be used with old esp32, but is adding functionality to use on C3/S3.
With this new API advertised device wont be stored in API, it is now user responsibility
author: chegewara
*/
#ifndef CONFIG_BT_BLE_50_FEATURES_SUPPORTED
#warning "Not compatible hardware"
#else
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>
uint32_t scanTime = 100; //In 10ms (1000ms)
BLEScan* pBLEScan;
/**
* @brief extend adv report parameters
*/
//typedef struct {
// esp_ble_gap_adv_type_t event_type; /*!< extend advertising type */
// uint8_t addr_type; /*!< extend advertising address type */
// esp_bd_addr_t addr; /*!< extend advertising address */
// esp_ble_gap_pri_phy_t primary_phy; /*!< extend advertising primary phy */
// esp_ble_gap_phy_t secondly_phy; /*!< extend advertising secondary phy */
// uint8_t sid; /*!< extend advertising sid */
// uint8_t tx_power; /*!< extend advertising tx power */
// int8_t rssi; /*!< extend advertising rssi */
// uint16_t per_adv_interval; /*!< periodic advertising interval */
// uint8_t dir_addr_type; /*!< direct address type */
// esp_bd_addr_t dir_addr; /*!< direct address */
// esp_ble_gap_ext_adv_data_status_t data_status; /*!< data type */
// uint8_t adv_data_len; /*!< extend advertising data length */
// uint8_t adv_data[251]; /*!< extend advertising data */
//} esp_ble_gap_ext_adv_reprot_t;
class MyBLEExtAdvertisingCallbacks: public BLEExtAdvertisingCallbacks {
void onResult(esp_ble_gap_ext_adv_reprot_t report) {
if(report.event_type & ESP_BLE_GAP_SET_EXT_ADV_PROP_LEGACY){
// here we can receive regular advertising data from BLE4.x devices
Serial.println("BLE4.2");
} else {
// here we will get extended advertising data that are advertised over data channel by BLE5 divices
Serial.printf("Ext advertise: data_le: %d, data_status: %d \n", report.adv_data_len, report.data_status);
}
}
};
void setup() {
Serial.begin(115200);
Serial.println("Scanning...");
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setExtendedScanCallback(new MyBLEExtAdvertisingCallbacks());
pBLEScan->setExtScanParams(); // use with pre-defined/default values, overloaded function allows to pass parameters
delay(1000); // it is just for simplicity this example, to let ble stack to set extended scan params
pBLEScan->startExtScan(scanTime, 3); // scan duration in n * 10ms, period - repeat after n seconds (period >= duration)
}
void loop() {
// put your main code here, to run repeatedly:
delay(2000);
}
#endif // CONFIG_BT_BLE_50_FEATURES_SUPPORTED

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/*
Simple BLE5 multi advertising example on esp32 C3/S3
only ESP_BLE_GAP_SET_EXT_ADV_PROP_LEGACY_IND is backward compatible
and can be scanned with BLE4.2 devices
author: chegewara
*/
#include <BLEDevice.h>
#include <BLEAdvertising.h>
esp_ble_gap_ext_adv_params_t ext_adv_params_1M = {
.type = ESP_BLE_GAP_SET_EXT_ADV_PROP_CONNECTABLE,
.interval_min = 0x30,
.interval_max = 0x30,
.channel_map = ADV_CHNL_ALL,
.own_addr_type = BLE_ADDR_TYPE_RANDOM,
.filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
.primary_phy = ESP_BLE_GAP_PHY_CODED,
.max_skip = 0,
.secondary_phy = ESP_BLE_GAP_PHY_1M,
.sid = 0,
.scan_req_notif = false,
};
esp_ble_gap_ext_adv_params_t ext_adv_params_2M = {
.type = ESP_BLE_GAP_SET_EXT_ADV_PROP_SCANNABLE,
.interval_min = 0x40,
.interval_max = 0x40,
.channel_map = ADV_CHNL_ALL,
.own_addr_type = BLE_ADDR_TYPE_RANDOM,
.filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
.primary_phy = ESP_BLE_GAP_PHY_1M,
.max_skip = 0,
.secondary_phy = ESP_BLE_GAP_PHY_2M,
.sid = 1,
.scan_req_notif = false,
};
esp_ble_gap_ext_adv_params_t legacy_adv_params = {
.type = ESP_BLE_GAP_SET_EXT_ADV_PROP_LEGACY_IND,
.interval_min = 0x45,
.interval_max = 0x45,
.channel_map = ADV_CHNL_ALL,
.own_addr_type = BLE_ADDR_TYPE_RANDOM,
.filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
.primary_phy = ESP_BLE_GAP_PHY_1M,
.max_skip = 0,
.secondary_phy = ESP_BLE_GAP_PHY_1M,
.sid = 2,
.scan_req_notif = false,
};
esp_ble_gap_ext_adv_params_t ext_adv_params_coded = {
.type = ESP_BLE_GAP_SET_EXT_ADV_PROP_SCANNABLE,
.interval_min = 0x50,
.interval_max = 0x50,
.channel_map = ADV_CHNL_ALL,
.own_addr_type = BLE_ADDR_TYPE_RANDOM,
.filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
.primary_phy = ESP_BLE_GAP_PHY_1M,
.max_skip = 0,
.secondary_phy = ESP_BLE_GAP_PHY_CODED,
.sid = 3,
.scan_req_notif = false,
};
static uint8_t raw_adv_data_1m[] = {
0x02, 0x01, 0x06,
0x02, 0x0a, 0xeb,
0x12, 0x09, 'E', 'S', 'P', '_', 'M', 'U', 'L', 'T', 'I', '_', 'A',
'D', 'V', '_', '1', 'M', 0X0
};
static uint8_t raw_scan_rsp_data_2m[] = {
0x02, 0x01, 0x06,
0x02, 0x0a, 0xeb,
0x12, 0x09, 'E', 'S', 'P', '_', 'M', 'U', 'L', 'T', 'I', '_', 'A',
'D', 'V', '_', '2', 'M', 0X0
};
static uint8_t legacy_adv_data[] = {
0x02, 0x01, 0x06,
0x02, 0x0a, 0xeb,
0x15, 0x09, 'E', 'S', 'P', '_', 'M', 'U', 'L', 'T', 'I', '_', 'A',
'D', 'V', '_', 'C', 'O', 'D', 'E', 'D', 0X0
};
static uint8_t legacy_scan_rsp_data[] = {
0x02, 0x01, 0x06,
0x02, 0x0a, 0xeb,
0x16, 0x09, 'E', 'S', 'P', '_', 'M', 'U', 'L', 'T', 'I', '_', 'A',
'D', 'V', '_', 'L', 'E', 'G', 'A', 'C', 'Y', 0X0
};
static uint8_t raw_scan_rsp_data_coded[] = {
0x37, 0x09, 'V', 'E', 'R', 'Y', '_', 'L', 'O', 'N', 'G', '_', 'D', 'E', 'V', 'I', 'C', 'E', '_', 'N', 'A', 'M', 'E', '_',
'S', 'E', 'N', 'T', '_', 'U', 'S', 'I', 'N', 'G', '_', 'E', 'X', 'T', 'E', 'N', 'D', 'E', 'D', '_', 'A', 'D', 'V', 'E', 'R', 'T', 'I', 'S', 'I', 'N', 'G', 0X0
};
uint8_t addr_1m[6] = {0xc0, 0xde, 0x52, 0x00, 0x00, 0x01};
uint8_t addr_2m[6] = {0xc0, 0xde, 0x52, 0x00, 0x00, 0x02};
uint8_t addr_legacy[6] = {0xc0, 0xde, 0x52, 0x00, 0x00, 0x03};
uint8_t addr_coded[6] = {0xc0, 0xde, 0x52, 0x00, 0x00, 0x04};
BLEMultiAdvertising advert(4); // max number of advertisement data
void setup() {
Serial.begin(115200);
Serial.println("Multi-Advertising...");
BLEDevice::init("");
advert.setAdvertisingParams(0, &ext_adv_params_1M);
advert.setAdvertisingData(0, sizeof(raw_adv_data_1m), &raw_adv_data_1m[0]);
advert.setInstanceAddress(0, addr_1m);
advert.setDuration(0);
advert.setAdvertisingParams(1, &ext_adv_params_2M);
advert.setScanRspData(1, sizeof(raw_scan_rsp_data_2m), &raw_scan_rsp_data_2m[0]);
advert.setInstanceAddress(1, addr_2m);
advert.setDuration(1);
advert.setAdvertisingParams(2, &legacy_adv_params);
advert.setAdvertisingData(2, sizeof(legacy_adv_data), &legacy_adv_data[0]);
advert.setScanRspData(2, sizeof(legacy_scan_rsp_data), &legacy_scan_rsp_data[0]);
advert.setInstanceAddress(2, addr_legacy);
advert.setDuration(2);
advert.setAdvertisingParams(3, &ext_adv_params_coded);
advert.setDuration(3);
advert.setScanRspData(3, sizeof(raw_scan_rsp_data_coded), &raw_scan_rsp_data_coded[0]);
advert.setInstanceAddress(3, addr_coded);
delay(1000);
advert.start(4, 0);
}
void loop() {
delay(2000);
}

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/*
Simple BLE5 multi advertising example on esp32 C3/S3
only ESP_BLE_GAP_SET_EXT_ADV_PROP_NONCONN_NONSCANNABLE_UNDIRECTED can be used for periodic advertising
author: chegewara
*/
#include <BLEDevice.h>
#include <BLEAdvertising.h>
esp_ble_gap_ext_adv_params_t ext_adv_params_2M = {
.type = ESP_BLE_GAP_SET_EXT_ADV_PROP_NONCONN_NONSCANNABLE_UNDIRECTED,
.interval_min = 0x40,
.interval_max = 0x40,
.channel_map = ADV_CHNL_ALL,
.own_addr_type = BLE_ADDR_TYPE_RANDOM,
.filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
.primary_phy = ESP_BLE_GAP_PHY_1M,
.max_skip = 0,
.secondary_phy = ESP_BLE_GAP_PHY_2M,
.sid = 1,
.scan_req_notif = false,
};
static uint8_t raw_scan_rsp_data_2m[] = {
0x02, 0x01, 0x06,
0x02, 0x0a, 0xeb,
0x12, 0x09, 'E', 'S', 'P', '_', 'M', 'U', 'L', 'T', 'I', '_', 'A',
'D', 'V', '_', '2', 'M', 0X0
};
static esp_ble_gap_periodic_adv_params_t periodic_adv_params = {
.interval_min = 0x320, // 1000 ms interval
.interval_max = 0x640,
.properties = 0, // Do not include TX power
};
static uint8_t periodic_adv_raw_data[] = {
0x02, 0x01, 0x06,
0x02, 0x0a, 0xeb,
0x03, 0x03, 0xab, 0xcd,
0x11, 0x09, 'E', 'S', 'P', '_', 'P', 'E', 'R', 'I', 'O', 'D', 'I',
'C', '_', 'A', 'D', 'V'
};
uint8_t addr_2m[6] = {0xc0, 0xde, 0x52, 0x00, 0x00, 0x02};
BLEMultiAdvertising advert(1); // max number of advertisement data
void setup() {
Serial.begin(115200);
Serial.println("Multi-Advertising...");
BLEDevice::init("");
advert.setAdvertisingParams(0, &ext_adv_params_2M);
advert.setAdvertisingData(0, sizeof(raw_scan_rsp_data_2m), &raw_scan_rsp_data_2m[0]);
advert.setInstanceAddress(0, addr_2m);
advert.setDuration(0, 0, 0);
delay(100);
advert.start();
advert.setPeriodicAdvertisingParams(0, &periodic_adv_params);
advert.setPeriodicAdvertisingData(0, sizeof(periodic_adv_raw_data), &periodic_adv_raw_data[0]);
advert.startPeriodicAdvertising(0);
}
void loop() {
delay(2000);
}

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/*
BLE5 extended scan example for esp32 C3 and S3
with this code it is simple to scan legacy (BLE4) compatible advertising,
and BLE5 extended advertising. New coded added in BLEScan is not changing old behavior,
which can be used with old esp32, but is adding functionality to use on C3/S3.
With this new API advertised device wont be stored in API, it is now user responsibility
author: chegewara
*/
#ifndef CONFIG_BT_BLE_50_FEATURES_SUPPORTED
#warning "Not compatible hardware"
#else
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
BLEScan *pBLEScan;
static bool periodic_sync = false;
static esp_ble_gap_periodic_adv_sync_params_t periodic_adv_sync_params = {
.filter_policy = 0,
.sid = 0,
.addr_type = BLE_ADDR_TYPE_RANDOM,
.skip = 10,
.sync_timeout = 1000, // timeout: 1000 * 10ms
};
/**
* @brief extend adv report parameters
*/
//typedef struct {
// esp_ble_gap_adv_type_t event_type; /*!< extend advertising type */
// uint8_t addr_type; /*!< extend advertising address type */
// esp_bd_addr_t addr; /*!< extend advertising address */
// esp_ble_gap_pri_phy_t primary_phy; /*!< extend advertising primary phy */
// esp_ble_gap_phy_t secondly_phy; /*!< extend advertising secondary phy */
// uint8_t sid; /*!< extend advertising sid */
// uint8_t tx_power; /*!< extend advertising tx power */
// int8_t rssi; /*!< extend advertising rssi */
// uint16_t per_adv_interval; /*!< periodic advertising interval */
// uint8_t dir_addr_type; /*!< direct address type */
// esp_bd_addr_t dir_addr; /*!< direct address */
// esp_ble_gap_ext_adv_data_status_t data_status; /*!< data type */
// uint8_t adv_data_len; /*!< extend advertising data length */
// uint8_t adv_data[251]; /*!< extend advertising data */
//} esp_ble_gap_ext_adv_reprot_t;
class MyBLEExtAdvertisingCallbacks : public BLEExtAdvertisingCallbacks
{
void onResult(esp_ble_gap_ext_adv_reprot_t params)
{
uint8_t *adv_name = NULL;
uint8_t adv_name_len = 0;
adv_name = esp_ble_resolve_adv_data(params.adv_data, ESP_BLE_AD_TYPE_NAME_CMPL, &adv_name_len);
if ((adv_name != NULL) && (memcmp(adv_name, "ESP_MULTI_ADV_2M", adv_name_len) == 0) && !periodic_sync)
{
periodic_sync = true;
char adv_temp_name[60] = {'0'};
memcpy(adv_temp_name, adv_name, adv_name_len);
log_i("Start create sync with the peer device %s", adv_temp_name);
periodic_adv_sync_params.sid = params.sid;
// periodic_adv_sync_params.addr_type = params.addr_type;
memcpy(periodic_adv_sync_params.addr, params.addr, sizeof(esp_bd_addr_t));
esp_ble_gap_periodic_adv_create_sync(&periodic_adv_sync_params);
}
}
};
class MyPeriodicScan : public BLEPeriodicScanCallbacks
{
// void onCreateSync(esp_bt_status_t status){}
// void onCancelSync(esp_bt_status_t status){}
// void onTerminateSync(esp_bt_status_t status){}
void onStop(esp_bt_status_t status)
{
log_i("ESP_GAP_BLE_EXT_SCAN_STOP_COMPLETE_EVT");
periodic_sync = false;
pBLEScan->startExtScan(0, 0); // scan duration in n * 10ms, period - repeat after n seconds (period >= duration)
}
void onLostSync(uint16_t sync_handle)
{
log_i("ESP_GAP_BLE_PERIODIC_ADV_SYNC_LOST_EVT");
esp_ble_gap_stop_ext_scan();
}
void onSync(esp_ble_periodic_adv_sync_estab_param_t params)
{
log_i("ESP_GAP_BLE_PERIODIC_ADV_SYNC_ESTAB_EVT, status %d", params.status);
// esp_log_buffer_hex("sync addr", param->periodic_adv_sync_estab.adv_addr, 6);
log_i("sync handle %d sid %d perioic adv interval %d adv phy %d", params.sync_handle,
params.sid,
params.period_adv_interval,
params.adv_phy);
}
void onReport(esp_ble_gap_periodic_adv_report_t params)
{
log_i("periodic adv report, sync handle %d data status %d data len %d rssi %d", params.sync_handle,
params.data_status,
params.data_length,
params.rssi);
}
};
void setup()
{
Serial.begin(115200);
Serial.println("Periodic scan...");
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setExtendedScanCallback(new MyBLEExtAdvertisingCallbacks());
pBLEScan->setExtScanParams(); // use with pre-defined/default values, overloaded function allows to pass parameters
pBLEScan->setPeriodicScanCallback(new MyPeriodicScan());
delay(100); // it is just for simplicity this example, to let ble stack to set extended scan params
pBLEScan->startExtScan(0, 0);
}
void loop()
{
delay(2000);
}
#endif // CONFIG_BT_BLE_50_FEATURES_SUPPORTED

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/*
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleScan.cpp
Ported to Arduino ESP32 by Evandro Copercini
Changed to a beacon scanner to report iBeacon, EddystoneURL and EddystoneTLM beacons by beegee-tokyo
*/
#include <Arduino.h>
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>
#include <BLEEddystoneURL.h>
#include <BLEEddystoneTLM.h>
#include <BLEBeacon.h>
#define ENDIAN_CHANGE_U16(x) ((((x)&0xFF00) >> 8) + (((x)&0xFF) << 8))
int scanTime = 5; //In seconds
BLEScan *pBLEScan;
class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks
{
void onResult(BLEAdvertisedDevice advertisedDevice)
{
if (advertisedDevice.haveName())
{
Serial.print("Device name: ");
Serial.println(advertisedDevice.getName().c_str());
Serial.println("");
}
if (advertisedDevice.haveServiceUUID())
{
BLEUUID devUUID = advertisedDevice.getServiceUUID();
Serial.print("Found ServiceUUID: ");
Serial.println(devUUID.toString().c_str());
Serial.println("");
}
else
{
if (advertisedDevice.haveManufacturerData() == true)
{
std::string strManufacturerData = advertisedDevice.getManufacturerData();
uint8_t cManufacturerData[100];
strManufacturerData.copy((char *)cManufacturerData, strManufacturerData.length(), 0);
if (strManufacturerData.length() == 25 && cManufacturerData[0] == 0x4C && cManufacturerData[1] == 0x00)
{
Serial.println("Found an iBeacon!");
BLEBeacon oBeacon = BLEBeacon();
oBeacon.setData(strManufacturerData);
Serial.printf("iBeacon Frame\n");
Serial.printf("ID: %04X Major: %d Minor: %d UUID: %s Power: %d\n", oBeacon.getManufacturerId(), ENDIAN_CHANGE_U16(oBeacon.getMajor()), ENDIAN_CHANGE_U16(oBeacon.getMinor()), oBeacon.getProximityUUID().toString().c_str(), oBeacon.getSignalPower());
}
else
{
Serial.println("Found another manufacturers beacon!");
Serial.printf("strManufacturerData: %d ", strManufacturerData.length());
for (int i = 0; i < strManufacturerData.length(); i++)
{
Serial.printf("[%X]", cManufacturerData[i]);
}
Serial.printf("\n");
}
}
return;
}
uint8_t *payLoad = advertisedDevice.getPayload();
BLEUUID checkUrlUUID = (uint16_t)0xfeaa;
if (advertisedDevice.getServiceUUID().equals(checkUrlUUID))
{
if (payLoad[11] == 0x10)
{
Serial.println("Found an EddystoneURL beacon!");
BLEEddystoneURL foundEddyURL = BLEEddystoneURL();
std::string eddyContent((char *)&payLoad[11]); // incomplete EddystoneURL struct!
foundEddyURL.setData(eddyContent);
std::string bareURL = foundEddyURL.getURL();
if (bareURL[0] == 0x00)
{
size_t payLoadLen = advertisedDevice.getPayloadLength();
Serial.println("DATA-->");
for (int idx = 0; idx < payLoadLen; idx++)
{
Serial.printf("0x%08X ", payLoad[idx]);
}
Serial.println("\nInvalid Data");
return;
}
Serial.printf("Found URL: %s\n", foundEddyURL.getURL().c_str());
Serial.printf("Decoded URL: %s\n", foundEddyURL.getDecodedURL().c_str());
Serial.printf("TX power %d\n", foundEddyURL.getPower());
Serial.println("\n");
}
else if (payLoad[11] == 0x20)
{
Serial.println("Found an EddystoneTLM beacon!");
BLEEddystoneTLM foundEddyURL = BLEEddystoneTLM();
std::string eddyContent((char *)&payLoad[11]); // incomplete EddystoneURL struct!
eddyContent = "01234567890123";
for (int idx = 0; idx < 14; idx++)
{
eddyContent[idx] = payLoad[idx + 11];
}
foundEddyURL.setData(eddyContent);
Serial.printf("Reported battery voltage: %dmV\n", foundEddyURL.getVolt());
Serial.printf("Reported temperature from TLM class: %.2fC\n", (double)foundEddyURL.getTemp());
int temp = (int)payLoad[16] + (int)(payLoad[15] << 8);
float calcTemp = temp / 256.0f;
Serial.printf("Reported temperature from data: %.2fC\n", calcTemp);
Serial.printf("Reported advertise count: %d\n", foundEddyURL.getCount());
Serial.printf("Reported time since last reboot: %ds\n", foundEddyURL.getTime());
Serial.println("\n");
Serial.print(foundEddyURL.toString().c_str());
Serial.println("\n");
}
}
}
};
void setup()
{
Serial.begin(115200);
Serial.println("Scanning...");
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
pBLEScan->setInterval(100);
pBLEScan->setWindow(99); // less or equal setInterval value
}
void loop()
{
// put your main code here, to run repeatedly:
BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
Serial.print("Devices found: ");
Serial.println(foundDevices.getCount());
Serial.println("Scan done!");
pBLEScan->clearResults(); // delete results fromBLEScan buffer to release memory
delay(2000);
}

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## BLE Beacon Scanner
Initiates a BLE device scan.
Checks if the discovered devices are
- an iBeacon
- an Eddystone TLM beacon
- an Eddystone URL beacon
and sends the decoded beacon information over Serial log

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/*
EddystoneTLM beacon by BeeGee based on https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_Eddystone_TLM_deepsleep/ESP32_Eddystone_TLM_deepsleep.ino
EddystoneTLM frame specification https://github.com/google/eddystone/blob/master/eddystone-tlm/tlm-plain.md
*/
/*
Create a BLE server that will send periodic Eddystone URL frames.
The design of creating the BLE server is:
1. Create a BLE Server
2. Create advertising data
3. Start advertising.
4. wait
5. Stop advertising.
6. deep sleep
*/
#include "sys/time.h"
#include <Arduino.h>
#include "BLEDevice.h"
#include "BLEUtils.h"
#include "BLEBeacon.h"
#include "BLEAdvertising.h"
#include "BLEEddystoneURL.h"
#include "esp_sleep.h"
#define GPIO_DEEP_SLEEP_DURATION 10 // 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;
struct timeval nowTimeStruct;
time_t lastTenth;
#define BEACON_UUID "8ec76ea3-6668-48da-9866-75be8bc86f4d" // UUID 1 128-Bit (may use linux tool uuidgen or random numbers via https://www.uuidgenerator.net/)
// Check
// https://github.com/google/eddystone/blob/master/eddystone-tlm/tlm-plain.md
// and http://www.hugi.scene.org/online/coding/hugi%2015%20-%20cmtadfix.htm
// for the temperature value. It is a 8.8 fixed-point notation
void setBeacon()
{
char beacon_data[25];
uint16_t beconUUID = 0xFEAA;
uint16_t volt = random(2800, 3700); // 3300mV = 3.3V
float tempFloat = random(2000, 3100) / 100.0f;
Serial.printf("Random temperature is %.2fC\n", tempFloat);
int temp = (int)(tempFloat * 256); //(uint16_t)((float)23.00);
Serial.printf("Converted to 8.8 format %0X%0X\n", (temp >> 8), (temp & 0xFF));
BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();
BLEAdvertisementData oScanResponseData = BLEAdvertisementData();
oScanResponseData.setFlags(0x06); // GENERAL_DISC_MODE 0x02 | BR_EDR_NOT_SUPPORTED 0x04
oScanResponseData.setCompleteServices(BLEUUID(beconUUID));
beacon_data[0] = 0x20; // Eddystone Frame Type (Unencrypted Eddystone-TLM)
beacon_data[1] = 0x00; // TLM version
beacon_data[2] = (volt >> 8); // Battery voltage, 1 mV/bit i.e. 0xCE4 = 3300mV = 3.3V
beacon_data[3] = (volt & 0xFF); //
beacon_data[4] = (temp >> 8); // Beacon temperature
beacon_data[5] = (temp & 0xFF); //
beacon_data[6] = ((bootcount & 0xFF000000) >> 24); // Advertising PDU count
beacon_data[7] = ((bootcount & 0xFF0000) >> 16); //
beacon_data[8] = ((bootcount & 0xFF00) >> 8); //
beacon_data[9] = (bootcount & 0xFF); //
beacon_data[10] = ((lastTenth & 0xFF000000) >> 24); // Time since power-on or reboot as 0.1 second resolution counter
beacon_data[11] = ((lastTenth & 0xFF0000) >> 16); //
beacon_data[12] = ((lastTenth & 0xFF00) >> 8); //
beacon_data[13] = (lastTenth & 0xFF); //
oScanResponseData.setServiceData(BLEUUID(beconUUID), std::string(beacon_data, 14));
oAdvertisementData.setName("TLMBeacon");
pAdvertising->setAdvertisementData(oAdvertisementData);
pAdvertising->setScanResponseData(oScanResponseData);
}
void setup()
{
Serial.begin(115200);
gettimeofday(&nowTimeStruct, NULL);
Serial.printf("start ESP32 %d\n", bootcount++);
Serial.printf("deep sleep (%lds since last reset, %lds since last boot)\n", nowTimeStruct.tv_sec, nowTimeStruct.tv_sec - last);
last = nowTimeStruct.tv_sec;
lastTenth = nowTimeStruct.tv_sec * 10; // Time since last reset as 0.1 second resolution counter
// Create the BLE Device
BLEDevice::init("TLMBeacon");
BLEDevice::setPower(ESP_PWR_LVL_N12);
pAdvertising = BLEDevice::getAdvertising();
setBeacon();
// Start advertising
pAdvertising->start();
Serial.println("Advertizing started for 10s ...");
delay(10000);
pAdvertising->stop();
Serial.printf("enter deep sleep for 10s\n");
esp_deep_sleep(1000000LL * GPIO_DEEP_SLEEP_DURATION);
Serial.printf("in deep sleep\n");
}
void loop()
{
}

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## Eddystone TLM beacon
EddystoneTLM beacon by BeeGee based on
[pcbreflux ESP32 Eddystone TLM deepsleep](https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_Eddystone_TLM_deepsleep/ESP32_Eddystone_TLM_deepsleep.ino)
[EddystoneTLM frame specification](https://github.com/google/eddystone/blob/master/eddystone-tlm/tlm-plain.md)
Create a BLE server that will send periodic Eddystone TLM frames.
The design of creating the BLE server is:
1. Create a BLE Server
2. Create advertising data
3. Start advertising.
4. wait
5. Stop advertising.
6. deep sleep

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/*
EddystoneURL beacon by BeeGee
EddystoneURL frame specification https://github.com/google/eddystone/blob/master/eddystone-url/README.md
*/
/*
Create a BLE server that will send periodic Eddystone URL frames.
The design of creating the BLE server is:
1. Create a BLE Server
2. Create advertising data
3. Start advertising.
4. wait
5. Stop advertising.
6. deep sleep
*/
#include "sys/time.h"
#include <Arduino.h>
#include "BLEDevice.h"
#include "BLEUtils.h"
#include "BLEBeacon.h"
#include "BLEAdvertising.h"
#include "BLEEddystoneURL.h"
#include "esp_sleep.h"
#define GPIO_DEEP_SLEEP_DURATION 10 // 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;
struct timeval now;
#define BEACON_UUID "8ec76ea3-6668-48da-9866-75be8bc86f4d" // UUID 1 128-Bit (may use linux tool uuidgen or random numbers via https://www.uuidgenerator.net/)
static const char *eddystone_url_prefix_subs[] = {
"http://www.",
"https://www.",
"http://",
"https://",
"urn:uuid:",
NULL
};
static const char *eddystone_url_suffix_subs[] = {
".com/",
".org/",
".edu/",
".net/",
".info/",
".biz/",
".gov/",
".com",
".org",
".edu",
".net",
".info",
".biz",
".gov",
NULL
};
static int string_begin_with(const char *str, const char *prefix)
{
int prefix_len = strlen(prefix);
if (strncmp(prefix, str, prefix_len) == 0)
{
return prefix_len;
}
return 0;
}
void setBeacon()
{
BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();
BLEAdvertisementData oScanResponseData = BLEAdvertisementData();
const char url[] = "https://d.giesecke.tk";
int scheme_len, ext_len = 1, i, idx, url_idx;
char *ret_data;
int url_len = strlen(url);
ret_data = (char *)calloc(1, url_len + 13);
ret_data[0] = 2; // Len
ret_data[1] = 0x01; // Type Flags
ret_data[2] = 0x06; // GENERAL_DISC_MODE 0x02 | BR_EDR_NOT_SUPPORTED 0x04
ret_data[3] = 3; // Len
ret_data[4] = 0x03; // Type 16-Bit UUID
ret_data[5] = 0xAA; // Eddystone UUID 2 -> 0xFEAA LSB
ret_data[6] = 0xFE; // Eddystone UUID 1 MSB
ret_data[7] = 19; // Length of Beacon Data
ret_data[8] = 0x16; // Type Service Data
ret_data[9] = 0xAA; // Eddystone UUID 2 -> 0xFEAA LSB
ret_data[10] = 0xFE; // Eddystone UUID 1 MSB
ret_data[11] = 0x10; // Eddystone Frame Type
ret_data[12] = 0xF4; // Beacons TX power at 0m
i = 0, idx = 13, url_idx = 0;
//replace prefix
scheme_len = 0;
while (eddystone_url_prefix_subs[i] != NULL)
{
if ((scheme_len = string_begin_with(url, eddystone_url_prefix_subs[i])) > 0)
{
ret_data[idx] = i;
idx++;
url_idx += scheme_len;
break;
}
i++;
}
while (url_idx < url_len)
{
i = 0;
ret_data[idx] = url[url_idx];
ext_len = 1;
while (eddystone_url_suffix_subs[i] != NULL)
{
if ((ext_len = string_begin_with(&url[url_idx], eddystone_url_suffix_subs[i])) > 0)
{
ret_data[idx] = i;
break;
}
else
{
ext_len = 1; //inc 1
}
i++;
}
url_idx += ext_len;
idx++;
}
ret_data[7] = idx - 8;
Serial.printf("struct size %d url size %d reported len %d\n",
url_len + 13,
url_len, ret_data[7]);
Serial.printf("URL in data %s\n", &ret_data[13]);
std::string eddyStoneData(ret_data);
oAdvertisementData.addData(eddyStoneData);
oScanResponseData.setName("URLBeacon");
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("URLBeacon");
BLEDevice::setPower(ESP_PWR_LVL_N12);
// Create the BLE Server
// BLEServer *pServer = BLEDevice::createServer(); // <-- no longer required to instantiate BLEServer, less flash and ram usage
pAdvertising = BLEDevice::getAdvertising();
setBeacon();
// Start advertising
pAdvertising->start();
Serial.println("Advertizing started...");
delay(10000);
pAdvertising->stop();
Serial.printf("enter deep sleep\n");
esp_deep_sleep(1000000LL * GPIO_DEEP_SLEEP_DURATION);
Serial.printf("in deep sleep\n");
}
void loop()
{
}

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## Eddystone URL beacon
EddystoneURL beacon by BeeGee based on
[pcbreflux ESP32 Eddystone URL deepsleep](https://github.com/pcbreflux/espressif/tree/master/esp32/arduino/sketchbook/ESP32_Eddystone_URL_deepsleep)
[EddystoneURL frame specification](https://github.com/google/eddystone/blob/master/eddystone-url/README.md)
Create a BLE server that will send periodic Eddystone URL frames.
The design of creating the BLE server is:
1. Create a BLE Server
2. Create advertising data
3. Start advertising.
4. wait
5. Stop advertising.
6. deep sleep

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/**
* A BLE client example that is rich in capabilities.
* There is a lot new capabilities implemented.
* author unknown
* updated by chegewara
*/
#include "BLEDevice.h"
//#include "BLEScan.h"
// The remote service we wish to connect to.
static BLEUUID serviceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b");
// The characteristic of the remote service we are interested in.
static BLEUUID charUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8");
static boolean doConnect = false;
static boolean connected = false;
static boolean doScan = false;
static BLERemoteCharacteristic* pRemoteCharacteristic;
static BLEAdvertisedDevice* myDevice;
static void notifyCallback(
BLERemoteCharacteristic* pBLERemoteCharacteristic,
uint8_t* pData,
size_t length,
bool isNotify) {
Serial.print("Notify callback for characteristic ");
Serial.print(pBLERemoteCharacteristic->getUUID().toString().c_str());
Serial.print(" of data length ");
Serial.println(length);
Serial.print("data: ");
Serial.println((char*)pData);
}
class MyClientCallback : public BLEClientCallbacks {
void onConnect(BLEClient* pclient) {
}
void onDisconnect(BLEClient* pclient) {
connected = false;
Serial.println("onDisconnect");
}
};
bool connectToServer() {
Serial.print("Forming a connection to ");
Serial.println(myDevice->getAddress().toString().c_str());
BLEClient* pClient = BLEDevice::createClient();
Serial.println(" - Created client");
pClient->setClientCallbacks(new MyClientCallback());
// Connect to the remove BLE Server.
pClient->connect(myDevice); // if you pass BLEAdvertisedDevice instead of address, it will be recognized type of peer device address (public or private)
Serial.println(" - Connected to server");
pClient->setMTU(517); //set client to request maximum MTU from server (default is 23 otherwise)
// Obtain a reference to the service we are after in the remote BLE server.
BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
if (pRemoteService == nullptr) {
Serial.print("Failed to find our service UUID: ");
Serial.println(serviceUUID.toString().c_str());
pClient->disconnect();
return false;
}
Serial.println(" - Found our service");
// Obtain a reference to the characteristic in the service of the remote BLE server.
pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
if (pRemoteCharacteristic == nullptr) {
Serial.print("Failed to find our characteristic UUID: ");
Serial.println(charUUID.toString().c_str());
pClient->disconnect();
return false;
}
Serial.println(" - Found our characteristic");
// Read the value of the characteristic.
if(pRemoteCharacteristic->canRead()) {
std::string value = pRemoteCharacteristic->readValue();
Serial.print("The characteristic value was: ");
Serial.println(value.c_str());
}
if(pRemoteCharacteristic->canNotify())
pRemoteCharacteristic->registerForNotify(notifyCallback);
connected = true;
return true;
}
/**
* Scan for BLE servers and find the first one that advertises the service we are looking for.
*/
class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
/**
* Called for each advertising BLE server.
*/
void onResult(BLEAdvertisedDevice advertisedDevice) {
Serial.print("BLE Advertised Device found: ");
Serial.println(advertisedDevice.toString().c_str());
// We have found a device, let us now see if it contains the service we are looking for.
if (advertisedDevice.haveServiceUUID() && advertisedDevice.isAdvertisingService(serviceUUID)) {
BLEDevice::getScan()->stop();
myDevice = new BLEAdvertisedDevice(advertisedDevice);
doConnect = true;
doScan = true;
} // Found our server
} // onResult
}; // MyAdvertisedDeviceCallbacks
void setup() {
Serial.begin(115200);
Serial.println("Starting Arduino BLE Client application...");
BLEDevice::init("");
// Retrieve a Scanner and set the callback we want to use to be informed when we
// have detected a new device. Specify that we want active scanning and start the
// scan to run for 5 seconds.
BLEScan* pBLEScan = BLEDevice::getScan();
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
pBLEScan->setInterval(1349);
pBLEScan->setWindow(449);
pBLEScan->setActiveScan(true);
pBLEScan->start(5, false);
} // End of setup.
// This is the Arduino main loop function.
void loop() {
// If the flag "doConnect" is true then we have scanned for and found the desired
// BLE Server with which we wish to connect. Now we connect to it. Once we are
// connected we set the connected flag to be true.
if (doConnect == true) {
if (connectToServer()) {
Serial.println("We are now connected to the BLE Server.");
} else {
Serial.println("We have failed to connect to the server; there is nothin more we will do.");
}
doConnect = false;
}
// If we are connected to a peer BLE Server, update the characteristic each time we are reached
// with the current time since boot.
if (connected) {
String newValue = "Time since boot: " + String(millis()/1000);
Serial.println("Setting new characteristic value to \"" + newValue + "\"");
// Set the characteristic's value to be the array of bytes that is actually a string.
pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length());
}else if(doScan){
BLEDevice::getScan()->start(0); // this is just example to start scan after disconnect, most likely there is better way to do it in arduino
}
delay(1000); // Delay a second between loops.
} // End of loop

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/*
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleScan.cpp
Ported to Arduino ESP32 by pcbreflux
*/
/*
Create a BLE server that will send periodic iBeacon frames.
The design of creating the BLE server is:
1. Create a BLE Server
2. Create advertising data
3. Start advertising.
4. wait
5. Stop advertising.
6. deep sleep
*/
#include "sys/time.h"
#include "BLEDevice.h"
#include "BLEUtils.h"
#include "BLEBeacon.h"
#include "esp_sleep.h"
#define GPIO_DEEP_SLEEP_DURATION 10 // 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
#ifdef __cplusplus
extern "C" {
#endif
uint8_t temprature_sens_read();
//uint8_t g_phyFuns;
#ifdef __cplusplus
}
#endif
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
BLEAdvertising *pAdvertising;
struct timeval now;
#define BEACON_UUID "8ec76ea3-6668-48da-9866-75be8bc86f4d" // 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);
pAdvertising->setAdvertisementType(ADV_TYPE_NONCONN_IND);
}
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("");
// Create the BLE Server
// BLEServer *pServer = BLEDevice::createServer(); // <-- no longer required to instantiate BLEServer, less flash and ram usage
pAdvertising = BLEDevice::getAdvertising();
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() {
}

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/*
Video: https://www.youtube.com/watch?v=oCMOYS71NIU
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
Ported to Arduino ESP32 by Evandro Copercini
updated by chegewara
Create a BLE server that, once we receive a connection, will send periodic notifications.
The service advertises itself as: 4fafc201-1fb5-459e-8fcc-c5c9c331914b
And has a characteristic of: beb5483e-36e1-4688-b7f5-ea07361b26a8
The design of creating the BLE server is:
1. Create a BLE Server
2. Create a BLE Service
3. Create a BLE Characteristic on the Service
4. Create a BLE Descriptor on the characteristic
5. Start the service.
6. Start advertising.
A connect hander associated with the server starts a background task that performs notification
every couple of seconds.
*/
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
BLEServer* pServer = NULL;
BLECharacteristic* pCharacteristic = NULL;
bool deviceConnected = false;
bool oldDeviceConnected = false;
uint32_t value = 0;
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
};
void onDisconnect(BLEServer* pServer) {
deviceConnected = false;
}
};
void setup() {
Serial.begin(115200);
// Create the BLE Device
BLEDevice::init("ESP32");
// Create the BLE Server
pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
// Create the BLE Service
BLEService *pService = pServer->createService(SERVICE_UUID);
// Create a BLE Characteristic
pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE |
BLECharacteristic::PROPERTY_NOTIFY |
BLECharacteristic::PROPERTY_INDICATE
);
// https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml
// Create a BLE Descriptor
pCharacteristic->addDescriptor(new BLE2902());
// Start the service
pService->start();
// Start advertising
BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
pAdvertising->addServiceUUID(SERVICE_UUID);
pAdvertising->setScanResponse(false);
pAdvertising->setMinPreferred(0x0); // set value to 0x00 to not advertise this parameter
BLEDevice::startAdvertising();
Serial.println("Waiting a client connection to notify...");
}
void loop() {
// notify changed value
if (deviceConnected) {
pCharacteristic->setValue((uint8_t*)&value, 4);
pCharacteristic->notify();
value++;
delay(3); // bluetooth stack will go into congestion, if too many packets are sent, in 6 hours test i was able to go as low as 3ms
}
// disconnecting
if (!deviceConnected && oldDeviceConnected) {
delay(500); // give the bluetooth stack the chance to get things ready
pServer->startAdvertising(); // restart advertising
Serial.println("start advertising");
oldDeviceConnected = deviceConnected;
}
// connecting
if (deviceConnected && !oldDeviceConnected) {
// do stuff here on connecting
oldDeviceConnected = deviceConnected;
}
}

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/*
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleScan.cpp
Ported to Arduino ESP32 by Evandro Copercini
*/
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>
int scanTime = 5; //In seconds
BLEScan* pBLEScan;
class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
void onResult(BLEAdvertisedDevice advertisedDevice) {
Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());
}
};
void setup() {
Serial.begin(115200);
Serial.println("Scanning...");
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
pBLEScan->setInterval(100);
pBLEScan->setWindow(99); // less or equal setInterval value
}
void loop() {
// put your main code here, to run repeatedly:
BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
Serial.print("Devices found: ");
Serial.println(foundDevices.getCount());
Serial.println("Scan done!");
pBLEScan->clearResults(); // delete results fromBLEScan buffer to release memory
delay(2000);
}

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/*
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleServer.cpp
Ported to Arduino ESP32 by Evandro Copercini
updates by chegewara
*/
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
void setup() {
Serial.begin(115200);
Serial.println("Starting BLE work!");
BLEDevice::init("Long name works now");
BLEServer *pServer = BLEDevice::createServer();
BLEService *pService = pServer->createService(SERVICE_UUID);
BLECharacteristic *pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE
);
pCharacteristic->setValue("Hello World says Neil");
pService->start();
// BLEAdvertising *pAdvertising = pServer->getAdvertising(); // this still is working for backward compatibility
BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
pAdvertising->addServiceUUID(SERVICE_UUID);
pAdvertising->setScanResponse(true);
pAdvertising->setMinPreferred(0x06); // functions that help with iPhone connections issue
pAdvertising->setMinPreferred(0x12);
BLEDevice::startAdvertising();
Serial.println("Characteristic defined! Now you can read it in your phone!");
}
void loop() {
// put your main code here, to run repeatedly:
delay(2000);
}

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/*
Video: https://www.youtube.com/watch?v=oCMOYS71NIU
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
Ported to Arduino ESP32 by Evandro Copercini
updated by chegewara
Create a BLE server that, once we receive a connection, will send periodic notifications.
The service advertises itself as: 4fafc201-1fb5-459e-8fcc-c5c9c331914b
And has a characteristic of: beb5483e-36e1-4688-b7f5-ea07361b26a8
The design of creating the BLE server is:
1. Create a BLE Server
2. Create a BLE Service
3. Create a BLE Characteristic on the Service
4. Create a BLE Descriptor on the characteristic
5. Start the service.
6. Start advertising.
A connect hander associated with the server starts a background task that performs notification
every couple of seconds.
*/
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
BLEServer* pServer = NULL;
BLECharacteristic* pCharacteristic = NULL;
bool deviceConnected = false;
bool oldDeviceConnected = false;
uint32_t value = 0;
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
BLEDevice::startAdvertising();
};
void onDisconnect(BLEServer* pServer) {
deviceConnected = false;
}
};
void setup() {
Serial.begin(115200);
// Create the BLE Device
BLEDevice::init("ESP32");
// Create the BLE Server
pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
// Create the BLE Service
BLEService *pService = pServer->createService(SERVICE_UUID);
// Create a BLE Characteristic
pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE |
BLECharacteristic::PROPERTY_NOTIFY |
BLECharacteristic::PROPERTY_INDICATE
);
// https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml
// Create a BLE Descriptor
pCharacteristic->addDescriptor(new BLE2902());
// Start the service
pService->start();
// Start advertising
BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
pAdvertising->addServiceUUID(SERVICE_UUID);
pAdvertising->setScanResponse(false);
pAdvertising->setMinPreferred(0x0); // set value to 0x00 to not advertise this parameter
BLEDevice::startAdvertising();
Serial.println("Waiting a client connection to notify...");
}
void loop() {
// notify changed value
if (deviceConnected) {
pCharacteristic->setValue((uint8_t*)&value, 4);
pCharacteristic->notify();
value++;
delay(10); // bluetooth stack will go into congestion, if too many packets are sent, in 6 hours test i was able to go as low as 3ms
}
// disconnecting
if (!deviceConnected && oldDeviceConnected) {
delay(500); // give the bluetooth stack the chance to get things ready
pServer->startAdvertising(); // restart advertising
Serial.println("start advertising");
oldDeviceConnected = deviceConnected;
}
// connecting
if (deviceConnected && !oldDeviceConnected) {
// do stuff here on connecting
oldDeviceConnected = deviceConnected;
}
}

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/*
Video: https://www.youtube.com/watch?v=oCMOYS71NIU
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
Ported to Arduino ESP32 by Evandro Copercini
Create a BLE server that, once we receive a connection, will send periodic notifications.
The service advertises itself as: 6E400001-B5A3-F393-E0A9-E50E24DCCA9E
Has a characteristic of: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E - used for receiving data with "WRITE"
Has a characteristic of: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E - used to send data with "NOTIFY"
The design of creating the BLE server is:
1. Create a BLE Server
2. Create a BLE Service
3. Create a BLE Characteristic on the Service
4. Create a BLE Descriptor on the characteristic
5. Start the service.
6. Start advertising.
In this example rxValue is the data received (only accessible inside that function).
And txValue is the data to be sent, in this example just a byte incremented every second.
*/
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
BLEServer *pServer = NULL;
BLECharacteristic * pTxCharacteristic;
bool deviceConnected = false;
bool oldDeviceConnected = false;
uint8_t txValue = 0;
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
#define SERVICE_UUID "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
};
void onDisconnect(BLEServer* pServer) {
deviceConnected = false;
}
};
class MyCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
if (rxValue.length() > 0) {
Serial.println("*********");
Serial.print("Received Value: ");
for (int i = 0; i < rxValue.length(); i++)
Serial.print(rxValue[i]);
Serial.println();
Serial.println("*********");
}
}
};
void setup() {
Serial.begin(115200);
// Create the BLE Device
BLEDevice::init("UART Service");
// Create the BLE Server
pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
// Create the BLE Service
BLEService *pService = pServer->createService(SERVICE_UUID);
// Create a BLE Characteristic
pTxCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID_TX,
BLECharacteristic::PROPERTY_NOTIFY
);
pTxCharacteristic->addDescriptor(new BLE2902());
BLECharacteristic * pRxCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID_RX,
BLECharacteristic::PROPERTY_WRITE
);
pRxCharacteristic->setCallbacks(new MyCallbacks());
// Start the service
pService->start();
// Start advertising
pServer->getAdvertising()->start();
Serial.println("Waiting a client connection to notify...");
}
void loop() {
if (deviceConnected) {
pTxCharacteristic->setValue(&txValue, 1);
pTxCharacteristic->notify();
txValue++;
delay(10); // bluetooth stack will go into congestion, if too many packets are sent
}
// disconnecting
if (!deviceConnected && oldDeviceConnected) {
delay(500); // give the bluetooth stack the chance to get things ready
pServer->startAdvertising(); // restart advertising
Serial.println("start advertising");
oldDeviceConnected = deviceConnected;
}
// connecting
if (deviceConnected && !oldDeviceConnected) {
// do stuff here on connecting
oldDeviceConnected = deviceConnected;
}
}

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/*
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleWrite.cpp
Ported to Arduino ESP32 by Evandro Copercini
*/
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
class MyCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string value = pCharacteristic->getValue();
if (value.length() > 0) {
Serial.println("*********");
Serial.print("New value: ");
for (int i = 0; i < value.length(); i++)
Serial.print(value[i]);
Serial.println();
Serial.println("*********");
}
}
};
void setup() {
Serial.begin(115200);
Serial.println("1- Download and install an BLE scanner app in your phone");
Serial.println("2- Scan for BLE devices in the app");
Serial.println("3- Connect to MyESP32");
Serial.println("4- Go to CUSTOM CHARACTERISTIC in CUSTOM SERVICE and write something");
Serial.println("5- See the magic =)");
BLEDevice::init("MyESP32");
BLEServer *pServer = BLEDevice::createServer();
BLEService *pService = pServer->createService(SERVICE_UUID);
BLECharacteristic *pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE
);
pCharacteristic->setCallbacks(new MyCallbacks());
pCharacteristic->setValue("Hello World");
pService->start();
BLEAdvertising *pAdvertising = pServer->getAdvertising();
pAdvertising->start();
}
void loop() {
// put your main code here, to run repeatedly:
delay(2000);
}