#include "BLEDevice.h"
#include "BLEServer.h"
#include "BLEUtils.h"
#include "BLE2902.h"
#include "Arduino.h"
BLECharacteristic *pCharacteristic;
bool deviceConnected = false;
uint8_t txValue = 0;
long lastMsg = 0;
String rxload="Test\n";
#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"
class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
};
void onDisconnect(BLEServer* pServer) {
deviceConnected = false;
}
};
class MyCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
if (rxValue.length() > 0) {
rxload="";
for (int i = 0; i < rxValue.length(); i++){
rxload +=(char)rxValue[i];
}
}
}
};
void setupBLE(String BLEName){
const char *ble_name=BLEName.c_str();
BLEDevice::init(ble_name);
BLEServer *pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
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(115200);
setupBLE("ESP32S3_Bluetooth");
}
void loop() {
long now = millis();
if (now - lastMsg > 100) {
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;
}
}
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