/*********************************************************************
 This is an example for our nRF52 based Bluefruit LE modules

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 Adafruit invests time and resources providing this open source code,
 please support Adafruit and open-source hardware by purchasing
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 MIT license, check LICENSE for more information
 All text above, and the splash screen below must be included in
 any redistribution
*********************************************************************/

#include <bluefruit.h>

void setup() 
{
  Serial.begin(115200);
  while ( !Serial ) delay(10);   // for nrf52840 with native usb

  Serial.println("Bluefruit52 Central Scan Example");
  Serial.println("--------------------------------\n");

  // Initialize Bluefruit with maximum connections as Peripheral = 0, Central = 1
  // SRAM usage required by SoftDevice will increase dramatically with number of connections
  Bluefruit.begin(0, 1);
  
  // Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
  Bluefruit.setTxPower(4);
  Bluefruit.setName("Bluefruit52");

  // Start Central Scan
  Bluefruit.setConnLedInterval(250);
  Bluefruit.Scanner.setRxCallback(scan_callback);
  Bluefruit.Scanner.start(0);

  Serial.println("Scanning ...");
}

void scan_callback(ble_gap_evt_adv_report_t* report)
{
  Serial.println("Timestamp Addr              Rssi Data");

  Serial.printf("%09d ", millis());
  
  // MAC is in little endian --> print reverse
  Serial.printBufferReverse(report->peer_addr.addr, 6, ':');
  Serial.print(" ");

  Serial.print(report->rssi);
  Serial.print("  ");

  Serial.printBuffer(report->data.p_data, report->data.len, '-');
  Serial.println();

  // Check if advertising contain BleUart service
  if ( Bluefruit.Scanner.checkReportForUuid(report, BLEUART_UUID_SERVICE) )
  {
    Serial.println("                       BLE UART service detected");
  }

  Serial.println();

  // For Softdevice v6: after received a report, scanner will be paused
  // We need to call Scanner resume() to continue scanning
  Bluefruit.Scanner.resume();
}

void loop() 
{
  // nothing to do
}