This is my "new" BLE_Client, requesting one service and two characteristics. Based in a BLE_Client example:
/*
A BLE client example that is rich in capabilities.
There is a lot new capabilities implemented.
author unknown
updated by chegewara
/
define LED_REC 2
include
include
include
include // contiene algunos parámetros GATT definidos.
// 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.
pRemoteCharacteristic1 = pRemoteService->getCharacteristic(charUUID_Custom);
pRemoteCharacteristic2 = pRemoteService->getCharacteristic(charUUID_Temp);
if (pRemoteCharacteristic2 == nullptr | pRemoteCharacteristic2 == nullptr ) {
Serial.print("Failed to find our characteristics UUID: ");
Serial.println(charUUID_Custom.toString().c_str());
Serial.println(charUUID_Temp.toString().c_str());
pClient->disconnect();
return false;
}
Serial.println(" - Found our characteristic");
// Read the value of the characteristic.
if(pRemoteCharacteristic1->canRead()) {
std::string value = pRemoteCharacteristic1->readValue();
Serial.print("The characteristic value was: ");
Serial.println(value.c_str());
}
if (pRemoteCharacteristic2->canRead()) {
uint8_t valueTemp = pRemoteCharacteristic2->readUInt8();
Serial.print("The characteristic value was: ");
Serial.println((int8_t)valueTemp);
}
if (pRemoteCharacteristic1->canNotify()){
pRemoteCharacteristic1->registerForNotify(notifyCallback);
}
if (pRemoteCharacteristic2->canNotify()){
pRemoteCharacteristic2->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;
} // Found our server
} // onResult
}; // MyAdvertisedDeviceCallbacks
void setup() {
pinMode(LED_REC, OUTPUT);
Serial.begin(115200);
Serial.println("Starting Arduino BLE Client application...");
BLEDevice::init("CLNT");
// 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.");
} 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) {
std::string value = pRemoteCharacteristic1->readValue();
uint8_t valueTemp = pRemoteCharacteristic2->readUInt8();
Serial.print("The characteristic value was: ");
Serial.println(value.c_str());
Serial.println((int8_t)valueTemp);
digitalWrite(LED_REC, HIGH);
delay(500);
}
digitalWrite(LED_REC, LOW);
delay(500); // Delay a second between loops.
Hello:
This is my "new" BLE_Client, requesting one service and two characteristics. Based in a BLE_Client example: /* A BLE client example that is rich in capabilities. There is a lot new capabilities implemented. author unknown updated by chegewara /
define LED_REC 2
include
include
include
include // contiene algunos parámetros GATT definidos.
define ESP_GATT_UUID_TEMP_CELSIUS 0x2A1F
/* ------------------------------------------------------------/ / // Servidor Ejemplo
// Servicio static BLEUUID serviceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b"); // Característica static BLEUUID charUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8"); // */
// Servidor Custom Server
// Servicio static BLEUUID serviceUUID("9850a346-e262-48bd-9df0-f1c5e15d6c36"); // Característica static BLEUUID charUUID_Custom("b435bf89-2864-4125-b166-7b3aecd08faa"); // Caract. Creada static BLEUUID charUUID_Temp((uint16_t) ESP_GATT_UUID_TEMP_CELSIUS); // Caract. TX Temperature Celsius */
/---------------------------------------------------------------------- /
static boolean doConnect = false; static boolean connected = false; static boolean doScan = false;
static BLERemoteCharacteristic pRemoteCharacteristic1; static BLERemoteCharacteristic pRemoteCharacteristic2; static BLEAdvertisedDevice* myDevice;
static void notifyCallback( BLERemoteCharacteristic pBLERemoteCharacteristic1, BLERemoteCharacteristic pBLERemoteCharacteristic2, uint8_t pData1, uint8_t pData2, size_t length, bool isNotify) { Serial.print("Notify callback for characteristics "); Serial.print(pBLERemoteCharacteristic1->getUUID().toString().c_str()); Serial.print(pBLERemoteCharacteristic2->getUUID().toString().c_str()); Serial.print(" of data length "); Serial.println(length); Serial.print("data 1: "); Serial.print((char) pData1); Serial.print("data 2: "); Serial.print((int8_t) pData2); Serial.println(" °C"); }
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. pRemoteCharacteristic1 = pRemoteService->getCharacteristic(charUUID_Custom); pRemoteCharacteristic2 = pRemoteService->getCharacteristic(charUUID_Temp);
if (pRemoteCharacteristic2 == nullptr | pRemoteCharacteristic2 == nullptr ) { Serial.print("Failed to find our characteristics UUID: "); Serial.println(charUUID_Custom.toString().c_str()); Serial.println(charUUID_Temp.toString().c_str()); pClient->disconnect(); return false; } Serial.println(" - Found our characteristic");
// Read the value of the characteristic. if(pRemoteCharacteristic1->canRead()) { std::string value = pRemoteCharacteristic1->readValue(); Serial.print("The characteristic value was: "); Serial.println(value.c_str()); } if (pRemoteCharacteristic2->canRead()) { uint8_t valueTemp = pRemoteCharacteristic2->readUInt8(); Serial.print("The characteristic value was: "); Serial.println((int8_t)valueTemp); }
if (pRemoteCharacteristic1->canNotify()){ pRemoteCharacteristic1->registerForNotify(notifyCallback); } if (pRemoteCharacteristic2->canNotify()){ pRemoteCharacteristic2->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;
} // Found our server } // onResult }; // MyAdvertisedDeviceCallbacks
void setup() {
pinMode(LED_REC, OUTPUT); Serial.begin(115200); Serial.println("Starting Arduino BLE Client application..."); BLEDevice::init("CLNT");
// 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."); } 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) { std::string value = pRemoteCharacteristic1->readValue(); uint8_t valueTemp = pRemoteCharacteristic2->readUInt8(); Serial.print("The characteristic value was: "); Serial.println(value.c_str()); Serial.println((int8_t)valueTemp);
digitalWrite(LED_REC, HIGH); delay(500); }
digitalWrite(LED_REC, LOW); delay(500); // Delay a second between loops.
} // End of loop
Thanks