Freenove ESP32-S3 - Page 53

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Chapter 3 Bluetooth
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BLEService *pService = pServer->createService(SERVICE_UUID);
pCharacteristic=
pService->createCharacteristic(CHARACTERISTIC_UUID_TX,BLECharacteristic::PROPERTY_NOTIFY);
pCharacteristic->addDescriptor(new BLE2902());
BLECharacteristic *pCharacteristic =
pService->createCharacteristic(CHARACTERISTIC_UUID_RX,BLECharacteristic::PROPERTY_WRITE);
pCharacteristic->setCallbacks(new MyCallbacks());
pService->start();
pServer->getAdvertising()->start();
Serial.println("Waiting a client connection to notify...");
}
void setup() {
Serial.begin(9600);
setupBLE("ESP32S3_Bluetooth");
}
void loop() {
long now = millis();
if (now - lastMsg > 1000) {
if (deviceConnected&&rxload.length()>0) {
Serial.println(rxload);
rxload="";
}
if(Serial.available()>0){
String str=Serial.readString();
const char *newValue=str.c_str();
pCharacteristic->setValue(newValue);
pCharacteristic->notify();
}
lastMsg = now;
}
}
Define the specified UUID number for BLE vendor.
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#define SERVICE_UUID "6E400001-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"