unable to update RSSI values

[aveleta]

hello I'm trying to read continuous RSSI values from the BLEClient example but I keep getting the same value over and over again. is there any way I can fix this? below is the code that I have. I havent changed much from the original Arduino example.

////////////START CODE ////////

/**

• A BLE client example that is rich in capabilities.
• There is a lot new capabilities implemented.
• author unknown
• updated by chegewara */

#include "BLEDevice.h" //#include "BLEScan.h" BLEClient* pClient = BLEDevice::createClient(); // The remote service we wish to connect to. static BLEUUID serviceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b"); // The characteristic of the remote service we are interested in. static BLEUUID charUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8");

static boolean doConnect = false; static boolean connected = false; static boolean doScan = false; static BLERemoteCharacteristic* pRemoteCharacteristic; BLEAdvertisedDevice* myDevice;

static void notifyCallback( BLERemoteCharacteristic* pBLERemoteCharacteristic, uint8_t* pData, size_t length, bool isNotify) { Serial.print("Notify callback for characteristic "); Serial.print(pBLERemoteCharacteristic->getUUID().toString().c_str()); Serial.print(" of data length "); Serial.println(length); Serial.print("data: "); Serial.println((char*)pData); }

class MyClientCallback : public BLEClientCallbacks { void onConnect(BLEClient* pclient) { }

void onDisconnect(BLEClient* pclient) { connected = false; Serial.println("onDisconnect"); } };

bool connectToServer() {

Serial.print("Forming a connection to ");
Serial.println(myDevice->getAddress().toString().c_str());

BLEClient*  pClient  = BLEDevice::createClient();
Serial.println(" - Created client");

pClient->setClientCallbacks(new MyClientCallback());

// Connect to the remove BLE Server.
pClient->connect(myDevice);  // if you pass BLEAdvertisedDevice instead of address, it will be recognized type of peer device address (public or private)
Serial.println(" - Connected to server");

// Obtain a reference to the service we are after in the remote BLE server.
BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
if (pRemoteService == nullptr) {
  Serial.print("Failed to find our service UUID: ");
  Serial.println(serviceUUID.toString().c_str());
  pClient->disconnect();
  return false;
}
Serial.println(" - Found our service");


// Obtain a reference to the characteristic in the service of the remote BLE server.
pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
if (pRemoteCharacteristic == nullptr) {
  Serial.print("Failed to find our characteristic UUID: ");
  Serial.println(charUUID.toString().c_str());
  pClient->disconnect();
  return false;
}
Serial.println(" - Found our characteristic");

// Read the value of the characteristic.
if(pRemoteCharacteristic->canRead()) {
  std::string value = pRemoteCharacteristic->readValue();
  Serial.print("The characteristic value was: ");
  Serial.println(value.c_str());
}

if(pRemoteCharacteristic->canNotify())
  pRemoteCharacteristic->registerForNotify(notifyCallback);

connected = true;

} /**

• Scan for BLE servers and find the first one that advertises the service we are looking for. / class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks { /*

  • Called for each advertising BLE server. */ void onResult(BLEAdvertisedDevice advertisedDevice) { Serial.print("BLE Advertised Device found: "); Serial.println(advertisedDevice.toString().c_str());

  // We have found a device, let us now see if it contains the service we are looking for. if (advertisedDevice.haveServiceUUID() && advertisedDevice.isAdvertisingService(serviceUUID)) {

  BLEDevice::getScan()->stop(); myDevice = new BLEAdvertisedDevice(advertisedDevice); doConnect = true; doScan = true; Serial.print(myDevice->getRSSI());

  } // Found our server } // onResult }; // MyAdvertisedDeviceCallbacks

void setup() { Serial.begin(115200); Serial.println("Starting Arduino BLE Client application..."); BLEDevice::init("");

// Retrieve a Scanner and set the callback we want to use to be informed when we // have detected a new device. Specify that we want active scanning and start the // scan to run for 5 seconds. BLEScan* pBLEScan = BLEDevice::getScan(); pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks()); pBLEScan->setInterval(1349); pBLEScan->setWindow(449); pBLEScan->setActiveScan(true); pBLEScan->start(5, false); } // End of setup.

// This is the Arduino main loop function. void loop() {

// If the flag "doConnect" is true then we have scanned for and found the desired // BLE Server with which we wish to connect. Now we connect to it. Once we are // connected we set the connected flag to be true. if (doConnect == true) { if (connectToServer()) { Serial.println("We are now connected to the BLE Server."); //for (int i= 0; doConnect== true ; i++){

// }

} else {
  Serial.println("We have failed to connect to the server; there is nothin more we will do.");
}
doConnect = false;

}

// If we are connected to a peer BLE Server, update the characteristic each time we are reached // with the current time since boot.

if (connected) { int rssi = myDevice->getRSSI(); Serial.println(rssi); // Set the characteristic's value to be the array of bytes that is actually a string. //pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length()); }else if(doScan){ BLEDevice::getScan()->start(0); // this is just eample to start scan after disconnect, most likely there is better way to do it in arduino }

delay(1000); // Delay a second between loops. } // End of loop

////////////END CODE//////////