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Communication / Bluetooth Low Energy:

» BLE 04 Scan device

This example shows how to make a scan with Bluetooth low energy and look for a specific BLE module, printing number of discovered devices and scan results.

Required Materials

1 x Waspmote
1 x Battery
1 x Bluetooth Low Energy module
1 x Bluetooth module antenna
1 x Expansion board (if socket 1 is used)
1 x SD card

Notes

Socket 0 is used by default
EEPROM is used in this example by default.
Never unplug module while Waspmote is turned ON.
Bluetooth module antenna should be connected.
The battery must be connected in ANY example.

Code

/*
 *  ------------------ [BLE_04] - scan device ------------------- 
 *
 *  Explanation: This example shows how to make a scan with 
 *  Bluetooth low energy and look for a specific BLE module, 
 *  printing number of discovered devices and scan results. 
 *
 *  Copyright (C) 2014 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 *
 *  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, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  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/>.
 *
 *  Version:		0.1
 *  Design:		David Gascón
 *  Implementation:	Javier Siscart
 */
#include <WaspBLE.h>

// Auxiliary variable
uint8_t aux = 0;
// MAC address of BLE device to find
char MAC[14] = "000780789EBF";

void setup() 
{  
  USB.println(F("BLE_04 Example"));  

  // 0. Turn BLE module ON
  BLE.ON(SOCKET0);
}


void loop() 
{
  // 1. Device scan
  USB.print("Look for device: ");
  USB.println(MAC);
  aux = BLE.scanDevice(MAC);
  if (aux == 1)
  {
    USB.println(F("Found "));
  }
  else
  {
    USB.println(F("Not found: "));
  }


  // 2. Device scan with a timeout
  USB.print("Look for device: ");
  USB.print(MAC);
  USB.println(" during 10 seconds");
  
  //aux = BLE.scanDevice(MAC, 10, TX_POWER_MAX);
  if (aux == 1)
  {
    USB.println(F("Found "));
  }
  else
  {
    USB.println(F("Not found: "));
  }
}

Output

E#
BLE_04 Example
New scan...
discovered devices: 2

Printing Last inquiry saved on EEPROM:
Scan params: GAP mode=2; scan_interval=75: scan_window=64; scan_duplicate_filtering=1; TXPower=15;
Device 0; 000780789ebf; RSSI:-41; Name:
Device 1; 00078053c1b9; RSSI:-39; Name:
devices printed:2

New scan...
discovered devices: 2

Printing Last inquiry saved on EEPROM:
Scan params: GAP mode=2; scan_interval=75: scan_window=64; scan_duplicate_filtering=1; TXPower=15;
Device 0; 000780789ebf; RSSI:-40; Name:
Device 1; 00078053c1b9; RSSI:-39; Name:
devices printed:2

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