LedDisplay/firmware/include/BluetoothLeUartServer.h

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#ifndef BLUETOOTH_LE_UART_SERVER
#define BLUETOOTH_LE_UART_SERVER
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
#include <Arduino.h>
class BluetoothLeUartServerCallbacks;
/*!
* \brief The BluetoothLeUartServer class can be used to connect to another Bluetooth LE device (like an Android phone) effordlessly.
*
* Example use
* \code
* #include <Arduino.h>
*
* BluetoothLeUartServer* server;
*
* class MyCallbacks : public BluetoothLeUartServerCallbacks
* {
* virtual void onDeviceConnectedChanged(bool deviceConnected)
* {
* Serial.println("Device connected changed");
* };
* virtual void onDataReceived(String data)
* {
* Serial.println("Got some data: " + data);
* };
* };
*
* void setup()
* {
* server = new BluetoothLeUartServer("LedDisplay1", "6e400001-b5a3-f393-e0a9-e50e24dcca9e", "6e400002-b5a3-f393-e0a9-e50e24dcca9e", "6e400003-b5a3-f393-e0a9-e50e24dcca9e");
* server->setCallbacks(new MyCallbacks());
* }
*
* void loop()
* {
* if(server->getDeviceConnected())
* server->sendData("PING");
* delay(1000);
* }
* \endcode
*/
class BluetoothLeUartServer : protected BLEServerCallbacks, protected BLECharacteristicCallbacks
{
public:
explicit BluetoothLeUartServer(String deviceName, const char uartServiceUUID[36], const char rxUUID[36], const char txUUID[36]);
// befriend for callbacks
friend class BLEServer;
friend class BLECharacteristic;
// public functions
void setCallbacks(BluetoothLeUartServerCallbacks *callbacks);
void sendData(String data);
bool getDeviceConnected();
bool disconnectCurrentDevice();
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String getDeviceAddress();
protected:
// callbacks for BLEServer
void onConnect(BLEServer *pServer, esp_ble_gatts_cb_param_t *param) override;
void onDisconnect(BLEServer *pServer) override;
// callback for BLECharacteristic
void onWrite(BLECharacteristic *rxCharacteristic) override;
private:
// service and characteristic UUIDs
const char *uartServiceUUID;
const char *rxUUID;
const char *txUUID;
esp_gatt_perm_t permissions;
// BLE Objects
BLEServer *bleServer;
BLEService *bleService;
BLECharacteristic *txCharacteristic;
BLECharacteristic *rxCharacteristic;
// helpers
bool deviceConnected;
uint16_t deviceConnectionId;
BluetoothLeUartServerCallbacks *callbacks;
};
class BluetoothLeUartServerCallbacks
{
public:
virtual void onDeviceConnectedChanged(bool deviceConnected);
virtual void onDataReceived(String data);
};
#endif // BLUETOOTH_LE_UART_SERVER