在Android中与ELM327建立连接后无法将ATZ命令发送到ELM 327 [英] Unable to send ATZ command to ELM 327 after establishing connection with ELM327 in android

问题描述

我编写了一个代码，该代码能够成功找到配对的OBD并建立与ELM327的连接，但是当我尝试发送ATZ命令时，应用程序崩溃了.

I have written a code which is successfully able to find the paired OBD and establish the connection with ELM327 but when i am trying to send ATZ command the application gets crash.

这是代码段，我可能做错了

Here's the code snippet, I may have done wrong

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;

    }

我不确定我在哪里做错了，所以我以两个要点( https://)的身份共享了整个代码流gist.github.com/sankarganesh/6376031 ，此要点将保存活动文件，并为蓝牙套接字侦听器提供另一个要点 https://gist.github.com/sankarganesh/6376039

I m not sure where i have done mistakes , so i m sharing the flow of the entire code as two gist , https://gist.github.com/sankarganesh/6376031, this gist holds the Activity file and one more gist for Bluetooth Socket Listener https://gist.github.com/sankarganesh/6376039

推荐答案

问题可能是提示符号>之后没有任何CR从ELM设备发送到计算机.如果您的串行输入缓冲区配置有CR终止，则会发生超时.

The problem might be that after the prompt sign > no CR is sent from the ELM-device to the computer. If your serial input buffer is configured with termination by a CR, a timeout will happen.

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