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