InputStreamReader reader = new InputStreamReader(conn.openInputStream());
            int BUFFER = 112;
            char[] buffer = new char[BUFFER];

            while (reader.read(buffer) == BUFFER) {
                int iniTrama = (buffer[1] << 8) | buffer[0];
                int finTrama = (buffer[BUFFER - 1] << 8) | buffer[BUFFER - 2];
                if (iniTrama == 43690 && finTrama == 5000) { // Validation
                    for (int i = 2; i < BUFFER - 2; i = i + 2) {
                        int word = (buffer[i + 1] << 8) | buffer[i];
                        int valorEcg = word;
                        if (indexSignal == SIGNAL_SIZE) { // a temporal memory
                            signal = new int[SIGNAL_SIZE];
                            indexSignal = 0;
                        }
                        signal[indexSignal++] = valorEcg; // The value
                        repaint(); // Call Canvas
                    }
                } else {
                    ....
                }
            }