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esp-nimble-cpp/examples/basic/BLE_scan/main/main.cpp

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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
Refactored back to IDF by H2zero
*/
/** NimBLE differences highlighted in comment blocks **/
/*******original********
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>
***********************/
#include <NimBLEDevice.h>
extern "C"{void app_main(void);}
int scanTime = 5 * 1000; // In milliseconds, 0 = scan forever
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BLEScan* pBLEScan;
class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
void onResult(const BLEAdvertisedDevice* advertisedDevice) {
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printf("Advertised Device: %s \n", advertisedDevice->toString().c_str());
}
};
void scanTask (void * parameter){
for(;;) {
// put your main code here, to run repeatedly:
BLEScanResults foundDevices = pBLEScan->getResults(scanTime, false);
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printf("Devices found: %d\n", foundDevices.getCount());
printf("Scan done!\n");
pBLEScan->clearResults(); // delete results fromBLEScan buffer to release memory
vTaskDelay(2000/portTICK_PERIOD_MS); // Delay a second between loops.
}
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vTaskDelete(NULL);
}
void app_main(void) {
printf("Scanning...\n");
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setScanCallbacks(new MyAdvertisedDeviceCallbacks());
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pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
pBLEScan->setInterval(100);
pBLEScan->setWindow(99); // less or equal setInterval value
xTaskCreate(scanTask, "scanTask", 5000, NULL, 1, NULL);
}