506 lines
16 KiB
C++
506 lines
16 KiB
C++
/*
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* BLEAdvertising.cpp
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*
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* This class encapsulates advertising a BLE Server.
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* Created on: Jun 21, 2017
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* Author: kolban
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*
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* The ESP-IDF provides a framework for BLE advertising. It has determined that there are a common set
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* of properties that are advertised and has built a data structure that can be populated by the programmer.
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* This means that the programmer doesn't have to "mess with" the low level construction of a low level
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* BLE advertising frame. Many of the fields are determined for us while others we can set before starting
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* to advertise.
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*
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* Should we wish to construct our own payload, we can use the BLEAdvertisementData class and call the setters
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* upon it. Once it is populated, we can then associate it with the advertising and what ever the programmer
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* set in the data will be advertised.
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*
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*/
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#include "sdkconfig.h"
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#if defined(CONFIG_BT_ENABLED)
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#include "BLEAdvertising.h"
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#include <esp_err.h>
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#include "BLEUtils.h"
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#include "GeneralUtils.h"
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#if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG)
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#include "esp32-hal-log.h"
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#define LOG_TAG ""
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#else
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#include "esp_log.h"
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static const char* LOG_TAG = "BLEAdvertising";
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#endif
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/**
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* @brief Construct a default advertising object.
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*
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*/
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BLEAdvertising::BLEAdvertising() {
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m_advData.set_scan_rsp = false;
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m_advData.include_name = true;
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m_advData.include_txpower = true;
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m_advData.min_interval = 0x20;
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m_advData.max_interval = 0x40;
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m_advData.appearance = 0x00;
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m_advData.manufacturer_len = 0;
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m_advData.p_manufacturer_data = nullptr;
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m_advData.service_data_len = 0;
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m_advData.p_service_data = nullptr;
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m_advData.service_uuid_len = 0;
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m_advData.p_service_uuid = nullptr;
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m_advData.flag = (ESP_BLE_ADV_FLAG_GEN_DISC | ESP_BLE_ADV_FLAG_BREDR_NOT_SPT);
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m_advParams.adv_int_min = 0x20;
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m_advParams.adv_int_max = 0x40;
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m_advParams.adv_type = ADV_TYPE_IND;
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m_advParams.own_addr_type = BLE_ADDR_TYPE_PUBLIC;
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m_advParams.channel_map = ADV_CHNL_ALL;
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m_advParams.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY;
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m_advParams.peer_addr_type = BLE_ADDR_TYPE_PUBLIC;
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m_customAdvData = false; // No custom advertising data
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m_customScanResponseData = false; // No custom scan response data
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} // BLEAdvertising
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/**
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* @brief Add a service uuid to exposed list of services.
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* @param [in] serviceUUID The UUID of the service to expose.
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*/
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void BLEAdvertising::addServiceUUID(BLEUUID serviceUUID) {
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m_serviceUUIDs.push_back(serviceUUID);
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} // addServiceUUID
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/**
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* @brief Add a service uuid to exposed list of services.
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* @param [in] serviceUUID The string representation of the service to expose.
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*/
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void BLEAdvertising::addServiceUUID(const char* serviceUUID) {
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addServiceUUID(BLEUUID(serviceUUID));
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} // addServiceUUID
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/**
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* @brief Set the device appearance in the advertising data.
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* The appearance attribute is of type 0x19. The codes for distinct appearances can be found here:
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* https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.gap.appearance.xml.
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* @param [in] appearance The appearance of the device in the advertising data.
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* @return N/A.
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*/
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void BLEAdvertising::setAppearance(uint16_t appearance) {
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m_advData.appearance = appearance;
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} // setAppearance
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void BLEAdvertising::setMinInterval(uint16_t mininterval) {
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m_advParams.adv_int_min = mininterval;
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} // setMinInterval
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void BLEAdvertising::setMaxInterval(uint16_t maxinterval) {
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m_advParams.adv_int_max = maxinterval;
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} // setMaxInterval
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void BLEAdvertising::setMinPreferred(uint16_t mininterval) {
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m_advData.min_interval = mininterval;
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} //
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void BLEAdvertising::setMaxPreferred(uint16_t maxinterval) {
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m_advData.max_interval = maxinterval;
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} //
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void BLEAdvertising::setScanResponse(bool set) {
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m_scanResp = set;
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}
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/**
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* @brief Set the filtering for the scan filter.
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* @param [in] scanRequestWhitelistOnly If true, only allow scan requests from those on the white list.
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* @param [in] connectWhitelistOnly If true, only allow connections from those on the white list.
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*/
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void BLEAdvertising::setScanFilter(bool scanRequestWhitelistOnly, bool connectWhitelistOnly) {
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ESP_LOGD(LOG_TAG, ">> setScanFilter: scanRequestWhitelistOnly: %d, connectWhitelistOnly: %d", scanRequestWhitelistOnly, connectWhitelistOnly);
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if (!scanRequestWhitelistOnly && !connectWhitelistOnly) {
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m_advParams.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY;
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ESP_LOGD(LOG_TAG, "<< setScanFilter");
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return;
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}
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if (scanRequestWhitelistOnly && !connectWhitelistOnly) {
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m_advParams.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_WLST_CON_ANY;
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ESP_LOGD(LOG_TAG, "<< setScanFilter");
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return;
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}
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if (!scanRequestWhitelistOnly && connectWhitelistOnly) {
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m_advParams.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_WLST;
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ESP_LOGD(LOG_TAG, "<< setScanFilter");
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return;
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}
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if (scanRequestWhitelistOnly && connectWhitelistOnly) {
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m_advParams.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_WLST_CON_WLST;
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ESP_LOGD(LOG_TAG, "<< setScanFilter");
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return;
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}
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} // setScanFilter
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/**
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* @brief Set the advertisement data that is to be published in a regular advertisement.
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* @param [in] advertisementData The data to be advertised.
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*/
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void BLEAdvertising::setAdvertisementData(BLEAdvertisementData& advertisementData) {
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ESP_LOGD(LOG_TAG, ">> setAdvertisementData");
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esp_err_t errRc = ::esp_ble_gap_config_adv_data_raw(
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(uint8_t*)advertisementData.getPayload().data(),
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advertisementData.getPayload().length());
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if (errRc != ESP_OK) {
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ESP_LOGE(LOG_TAG, "esp_ble_gap_config_adv_data_raw: %d %s", errRc, GeneralUtils::errorToString(errRc));
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}
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m_customAdvData = true; // Set the flag that indicates we are using custom advertising data.
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ESP_LOGD(LOG_TAG, "<< setAdvertisementData");
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} // setAdvertisementData
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/**
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* @brief Set the advertisement data that is to be published in a scan response.
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* @param [in] advertisementData The data to be advertised.
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*/
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void BLEAdvertising::setScanResponseData(BLEAdvertisementData& advertisementData) {
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ESP_LOGD(LOG_TAG, ">> setScanResponseData");
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esp_err_t errRc = ::esp_ble_gap_config_scan_rsp_data_raw(
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(uint8_t*)advertisementData.getPayload().data(),
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advertisementData.getPayload().length());
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if (errRc != ESP_OK) {
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ESP_LOGE(LOG_TAG, "esp_ble_gap_config_scan_rsp_data_raw: %d %s", errRc, GeneralUtils::errorToString(errRc));
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}
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m_customScanResponseData = true; // Set the flag that indicates we are using custom scan response data.
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ESP_LOGD(LOG_TAG, "<< setScanResponseData");
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} // setScanResponseData
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/**
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* @brief Start advertising.
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* Start advertising.
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* @return N/A.
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*/
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void BLEAdvertising::start() {
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ESP_LOGD(LOG_TAG, ">> start: customAdvData: %d, customScanResponseData: %d", m_customAdvData, m_customScanResponseData);
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// We have a vector of service UUIDs that we wish to advertise. In order to use the
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// ESP-IDF framework, these must be supplied in a contiguous array of their 128bit (16 byte)
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// representations. If we have 1 or more services to advertise then we allocate enough
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// storage to host them and then copy them in one at a time into the contiguous storage.
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int numServices = m_serviceUUIDs.size();
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if (numServices > 0) {
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m_advData.service_uuid_len = 16 * numServices;
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m_advData.p_service_uuid = new uint8_t[m_advData.service_uuid_len];
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uint8_t* p = m_advData.p_service_uuid;
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for (int i = 0; i < numServices; i++) {
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ESP_LOGD(LOG_TAG, "- advertising service: %s", m_serviceUUIDs[i].toString().c_str());
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BLEUUID serviceUUID128 = m_serviceUUIDs[i].to128();
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memcpy(p, serviceUUID128.getNative()->uuid.uuid128, 16);
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p += 16;
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}
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} else {
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m_advData.service_uuid_len = 0;
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ESP_LOGD(LOG_TAG, "- no services advertised");
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}
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esp_err_t errRc;
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if (!m_customAdvData) {
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// Set the configuration for advertising.
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m_advData.set_scan_rsp = false;
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m_advData.include_name = !m_scanResp;
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m_advData.include_txpower = !m_scanResp;
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errRc = ::esp_ble_gap_config_adv_data(&m_advData);
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if (errRc != ESP_OK) {
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ESP_LOGE(LOG_TAG, "<< esp_ble_gap_config_adv_data: rc=%d %s", errRc, GeneralUtils::errorToString(errRc));
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return;
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}
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}
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if (!m_customScanResponseData && m_scanResp) {
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m_advData.set_scan_rsp = true;
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m_advData.include_name = m_scanResp;
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m_advData.include_txpower = m_scanResp;
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errRc = ::esp_ble_gap_config_adv_data(&m_advData);
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if (errRc != ESP_OK) {
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ESP_LOGE(LOG_TAG, "<< esp_ble_gap_config_adv_data (Scan response): rc=%d %s", errRc, GeneralUtils::errorToString(errRc));
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return;
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}
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}
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// If we had services to advertise then we previously allocated some storage for them.
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// Here we release that storage.
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if (m_advData.service_uuid_len > 0) {
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delete[] m_advData.p_service_uuid;
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m_advData.p_service_uuid = nullptr;
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}
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// Start advertising.
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errRc = ::esp_ble_gap_start_advertising(&m_advParams);
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if (errRc != ESP_OK) {
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ESP_LOGE(LOG_TAG, "<< esp_ble_gap_start_advertising: rc=%d %s", errRc, GeneralUtils::errorToString(errRc));
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return;
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}
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ESP_LOGD(LOG_TAG, "<< start");
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} // start
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/**
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* @brief Stop advertising.
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* Stop advertising.
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* @return N/A.
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*/
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void BLEAdvertising::stop() {
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ESP_LOGD(LOG_TAG, ">> stop");
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esp_err_t errRc = ::esp_ble_gap_stop_advertising();
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if (errRc != ESP_OK) {
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ESP_LOGE(LOG_TAG, "esp_ble_gap_stop_advertising: rc=%d %s", errRc, GeneralUtils::errorToString(errRc));
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return;
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}
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ESP_LOGD(LOG_TAG, "<< stop");
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} // stop
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/**
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* @brief Add data to the payload to be advertised.
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* @param [in] data The data to be added to the payload.
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*/
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void BLEAdvertisementData::addData(std::string data) {
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if ((m_payload.length() + data.length()) > ESP_BLE_ADV_DATA_LEN_MAX) {
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return;
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}
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m_payload.append(data);
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} // addData
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/**
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* @brief Set the appearance.
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* @param [in] appearance The appearance code value.
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*
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* See also:
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* https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.gap.appearance.xml
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*/
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void BLEAdvertisementData::setAppearance(uint16_t appearance) {
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char cdata[2];
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cdata[0] = 3;
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cdata[1] = ESP_BLE_AD_TYPE_APPEARANCE; // 0x19
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addData(std::string(cdata, 2) + std::string((char*) &appearance, 2));
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} // setAppearance
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/**
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* @brief Set the complete services.
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* @param [in] uuid The single service to advertise.
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*/
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void BLEAdvertisementData::setCompleteServices(BLEUUID uuid) {
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char cdata[2];
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switch (uuid.bitSize()) {
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case 16: {
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// [Len] [0x02] [LL] [HH]
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cdata[0] = 3;
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cdata[1] = ESP_BLE_AD_TYPE_16SRV_CMPL; // 0x03
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addData(std::string(cdata, 2) + std::string((char*) &uuid.getNative()->uuid.uuid16, 2));
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break;
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}
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case 32: {
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// [Len] [0x04] [LL] [LL] [HH] [HH]
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cdata[0] = 5;
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cdata[1] = ESP_BLE_AD_TYPE_32SRV_CMPL; // 0x05
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addData(std::string(cdata, 2) + std::string((char*) &uuid.getNative()->uuid.uuid32, 4));
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break;
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}
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case 128: {
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// [Len] [0x04] [0] [1] ... [15]
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cdata[0] = 17;
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cdata[1] = ESP_BLE_AD_TYPE_128SRV_CMPL; // 0x07
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addData(std::string(cdata, 2) + std::string((char*) uuid.getNative()->uuid.uuid128, 16));
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break;
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}
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default:
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return;
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}
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} // setCompleteServices
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/**
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* @brief Set the advertisement flags.
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* @param [in] The flags to be set in the advertisement.
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*
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* * ESP_BLE_ADV_FLAG_LIMIT_DISC
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* * ESP_BLE_ADV_FLAG_GEN_DISC
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* * ESP_BLE_ADV_FLAG_BREDR_NOT_SPT
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* * ESP_BLE_ADV_FLAG_DMT_CONTROLLER_SPT
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* * ESP_BLE_ADV_FLAG_DMT_HOST_SPT
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* * ESP_BLE_ADV_FLAG_NON_LIMIT_DISC
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*/
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void BLEAdvertisementData::setFlags(uint8_t flag) {
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char cdata[3];
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cdata[0] = 2;
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cdata[1] = ESP_BLE_AD_TYPE_FLAG; // 0x01
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cdata[2] = flag;
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addData(std::string(cdata, 3));
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} // setFlag
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/**
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* @brief Set manufacturer specific data.
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* @param [in] data Manufacturer data.
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*/
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void BLEAdvertisementData::setManufacturerData(std::string data) {
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ESP_LOGD("BLEAdvertisementData", ">> setManufacturerData");
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char cdata[2];
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cdata[0] = data.length() + 1;
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cdata[1] = ESP_BLE_AD_MANUFACTURER_SPECIFIC_TYPE; // 0xff
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addData(std::string(cdata, 2) + data);
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ESP_LOGD("BLEAdvertisementData", "<< setManufacturerData");
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} // setManufacturerData
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/**
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* @brief Set the name.
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* @param [in] The complete name of the device.
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*/
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void BLEAdvertisementData::setName(std::string name) {
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ESP_LOGD("BLEAdvertisementData", ">> setName: %s", name.c_str());
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char cdata[2];
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cdata[0] = name.length() + 1;
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cdata[1] = ESP_BLE_AD_TYPE_NAME_CMPL; // 0x09
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addData(std::string(cdata, 2) + name);
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ESP_LOGD("BLEAdvertisementData", "<< setName");
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} // setName
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/**
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* @brief Set the partial services.
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* @param [in] uuid The single service to advertise.
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*/
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void BLEAdvertisementData::setPartialServices(BLEUUID uuid) {
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char cdata[2];
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switch (uuid.bitSize()) {
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case 16: {
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// [Len] [0x02] [LL] [HH]
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cdata[0] = 3;
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cdata[1] = ESP_BLE_AD_TYPE_16SRV_PART; // 0x02
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addData(std::string(cdata, 2) + std::string((char *) &uuid.getNative()->uuid.uuid16, 2));
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break;
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}
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case 32: {
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// [Len] [0x04] [LL] [LL] [HH] [HH]
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cdata[0] = 5;
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cdata[1] = ESP_BLE_AD_TYPE_32SRV_PART; // 0x04
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addData(std::string(cdata, 2) + std::string((char *) &uuid.getNative()->uuid.uuid32, 4));
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break;
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}
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case 128: {
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// [Len] [0x04] [0] [1] ... [15]
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cdata[0] = 17;
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cdata[1] = ESP_BLE_AD_TYPE_128SRV_PART; // 0x06
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addData(std::string(cdata, 2) + std::string((char *) &uuid.getNative()->uuid.uuid128, 16));
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break;
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}
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default:
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return;
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}
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} // setPartialServices
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/**
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* @brief Set the service data (UUID + data)
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* @param [in] uuid The UUID to set with the service data. Size of UUID will be used.
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* @param [in] data The data to be associated with the service data advert.
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*/
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void BLEAdvertisementData::setServiceData(BLEUUID uuid, std::string data) {
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char cdata[2];
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switch (uuid.bitSize()) {
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case 16: {
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// [Len] [0x16] [UUID16] data
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cdata[0] = data.length() + 3;
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cdata[1] = ESP_BLE_AD_TYPE_SERVICE_DATA; // 0x16
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addData(std::string(cdata, 2) + std::string((char*) &uuid.getNative()->uuid.uuid16, 2) + data);
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break;
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}
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case 32: {
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// [Len] [0x20] [UUID32] data
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cdata[0] = data.length() + 5;
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cdata[1] = ESP_BLE_AD_TYPE_32SERVICE_DATA; // 0x20
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addData(std::string(cdata, 2) + std::string((char*) &uuid.getNative()->uuid.uuid32, 4) + data);
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break;
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}
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case 128: {
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// [Len] [0x21] [UUID128] data
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cdata[0] = data.length() + 17;
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cdata[1] = ESP_BLE_AD_TYPE_128SERVICE_DATA; // 0x21
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addData(std::string(cdata, 2) + std::string((char*) &uuid.getNative()->uuid.uuid128, 16) + data);
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break;
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}
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default:
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return;
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}
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} // setServiceData
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/**
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* @brief Set the short name.
|
|
* @param [in] The short name of the device.
|
|
*/
|
|
void BLEAdvertisementData::setShortName(std::string name) {
|
|
ESP_LOGD("BLEAdvertisementData", ">> setShortName: %s", name.c_str());
|
|
char cdata[2];
|
|
cdata[0] = name.length() + 1;
|
|
cdata[1] = ESP_BLE_AD_TYPE_NAME_SHORT; // 0x08
|
|
addData(std::string(cdata, 2) + name);
|
|
ESP_LOGD("BLEAdvertisementData", "<< setShortName");
|
|
} // setShortName
|
|
|
|
|
|
/**
|
|
* @brief Retrieve the payload that is to be advertised.
|
|
* @return The payload that is to be advertised.
|
|
*/
|
|
std::string BLEAdvertisementData::getPayload() {
|
|
return m_payload;
|
|
} // getPayload
|
|
|
|
void BLEAdvertising::handleGAPEvent(
|
|
esp_gap_ble_cb_event_t event,
|
|
esp_ble_gap_cb_param_t* param) {
|
|
|
|
ESP_LOGD(LOG_TAG, "handleGAPEvent [event no: %d]", (int)event);
|
|
|
|
switch(event) {
|
|
case ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT: {
|
|
// m_semaphoreSetAdv.give();
|
|
break;
|
|
}
|
|
case ESP_GAP_BLE_SCAN_RSP_DATA_SET_COMPLETE_EVT: {
|
|
// m_semaphoreSetAdv.give();
|
|
break;
|
|
}
|
|
case ESP_GAP_BLE_ADV_START_COMPLETE_EVT: {
|
|
// m_semaphoreSetAdv.give();
|
|
break;
|
|
}
|
|
case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT: {
|
|
ESP_LOGI(LOG_TAG, "STOP advertising");
|
|
start();
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
#endif /* CONFIG_BT_ENABLED */
|