B4R Question ESP32 BLE Scanning - Inline C

[Tron71]

Hi,

Would anyone have some sample in-line C for the ESP32 to perform scanning of MAC/Bluetooth addresses and their RSSI levels.

Thanks in advance.
M.

 

[thetahsk]

Hi,
...
M.

..here is a very simple quick and simple port from https://github.com/espressif/arduino-esp32/blob/master/libraries/BLE/examples/BLE_scan/BLE_scan.ino

#Region Project Attributes
    #AutoFlushLogs: True
    #CheckArrayBounds: True
    #StackBufferSize: 300
#End Region

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'Public variables can be accessed from all modules.
    Public Serial1 As Serial
End Sub

Private Sub AppStart
    Serial1.Initialize(115200)
    Log("AppStart")
    RunNative("setup", Null)
    AddLooper("Looper1")
End Sub

Private Sub Looper1
    RunNative("loop", Null)
End Sub

#if C

/*
  https://github.com/espressif/arduino-esp32/blob/master/libraries/BLE/examples/BLE_scan/BLE_scan.ino
*/

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>

int scanTime = 10; //In seconds
BLEScan* pBLEScan;

class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
    void onResult(BLEAdvertisedDevice advertisedDevice) {
      Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());
      Serial.print(" RSSI: ");Serial.println(advertisedDevice.getRSSI());   // added 26.11.2019
    }
};

void setup(B4R::Object* o) {
  Serial.begin(115200);
  Serial.println("Scanning...");
  BLEDevice::init("");
  pBLEScan = BLEDevice::getScan(); //create new scan
  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
  pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
  pBLEScan->setInterval(100);
  pBLEScan->setWindow(99);  // less or equal setInterval value
 
}

void loop(B4R::Object* o) {
  // put your main code here, to run repeatedly:
  BLEScanResults foundDevices = pBLEScan->start(scanTime, true);
  Serial.print("Devices found: ");
  Serial.println(foundDevices.getCount());
 
  // you can access first device with foundDevices.getDevice(0).getAddress()
 
  Serial.println("Scan done!");
  pBLEScan->clearResults();   // delete results fromBLEScan buffer to release memory
  delay(2000);
}

#End if

 

[Tron71]

Excellent! Thanks.

Just need to figure out how to pass the results back to B4R now.

M.