Eu escrevi um código que é capaz de encontrar o OBD emparelhado e estabelecer a conexão com ELM327 com sucesso, mas quando estou tentando enviar o comando ATZ o aplicativo obtém falha.

Aqui está o trecho de código, eu posso ter feito errado

public HashMap<String, String> startOBDCommunicator(
            BluetoothSocket btSocketConnected, String paramClassName,
            String methodName) {

        HashMap<String, String> dataRetriever = new HashMap<String, String>();
        sendDataToOBD(btSocketConnected, "ATZ\r");
        dataRetriever.put("Reset", readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATS0\r");
        dataRetriever.put("Space Control", readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATE0\r");
        dataRetriever.put("Echo control", readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATL0\r");
        dataRetriever.put("Line feed", readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATAT0\r");
        dataRetriever
                .put("Adaptive Timing", readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATST10\r");
        dataRetriever.put("Time Out", readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATI\r");
        dataRetriever.put("Device Description",
                readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATDP\r");
        dataRetriever.put("Protocol Information1",
                readDataFromOBD(btSocketConnected));

        sendDataToOBD(btSocketConnected, "ATSPA0\r");
        dataRetriever
                .put("Auto Protocol",
                        readBytesFromOBD(btSocketConnected, paramClassName,
                                methodName));

        sendDataToOBD(btSocketConnected, "010C\r");

        dataRetriever
                .put("RPM param",
                        readBytesFromOBD(btSocketConnected, paramClassName,
                                methodName));

        sendDataToOBD(btSocketConnected, "010D\r");

        dataRetriever
                .put("Speed parameters",
                        readBytesFromOBD(btSocketConnected, paramClassName,
                                methodName));

        sendDataToOBD(btSocketConnected, "0104\r");

        dataRetriever
                .put("engine load value parameters",
                        readBytesFromOBD(btSocketConnected, paramClassName,
                                methodName));

        sendDataToOBD(btSocketConnected, "0105\r");

        dataRetriever
                .put("Engine coolant temperature parameters",
                        readBytesFromOBD(btSocketConnected, paramClassName,
                                methodName));

        sendDataToOBD(btSocketConnected, "012F\r");

        dataRetriever
                .put("Fuel Level Input",
                        readBytesFromOBD(btSocketConnected, paramClassName,
                                methodName));

        return dataRetriever;

    }

Não tenho certeza de onde cometi erros, então estou compartilhando o fluxo de todo o código como doishttps://gist.github.com/sankarganesh/6376031, esta essência mantém o arquivo de atividade e mais uma essência para ouvinte de soquete Bluetoothhttps://gist.github.com/sankarganesh/6376039