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BLEScanner.cpp
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BLEScanner.cpp
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/*
* This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
* https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "BLEScanner.hpp"
#include "posixsd.hpp"
#define SCAN_FILENAME \
String(String("/bluetooth/scan_") + millis() + String(".json"))
BLEScanner::BLEScanner(int scan_time) {
// advertisements from the same address will be reported only once,
// except if the data in the advertisement has changed
NimBLEDevice::setScanFilterMode(CONFIG_BTDM_SCAN_DUPL_TYPE_DATA_DEVICE);
NimBLEDevice::init(""); // Init BLE stack
adv_device_callback = new AdvertisedScannedDeviceCallback();
create_scan();
start_scan(scan_time);
}
BLEScanner::~BLEScanner() {
pBLEScan->stop();
pBLEScan->clearResults();
}
void BLEScanner::save_to_sd(FS sd, JsonDocument *result) {
File file = open(SCAN_FILENAME, "w");
serializeJson(*result, file);
file.close();
}
void BLEScanner::create_scan() {
pBLEScan = NimBLEDevice::getScan(); // create new scan
// Set the callback for when devices are discovered, no duplicates.
adv_device_callback->begin(); // Clear previous results, if any
pBLEScan->setAdvertisedDeviceCallbacks(adv_device_callback);
pBLEScan->setActiveScan(true); // Set active scanning, this will get more
// data from the advertiser.
pBLEScan->setInterval(
97); // How often the scan occurs / switches channels; in milliseconds,
pBLEScan->setWindow(
37); // How long to scan during the interval; in milliseconds.
pBLEScan->setMaxResults(
0); // do not store the scan results, use callback only.
}
inline void BLEScanner::start_scan(int scan_time) {
pBLEScan->start(scan_time);
}
void BLEScanner::restart_scan(int scan_time) {
create_scan();
start_scan(scan_time);
}