问题
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.
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;
}
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
回答1:
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.
来源:https://stackoverflow.com/questions/18528792/unable-to-send-atz-command-to-elm-327-after-establishing-connection-with-elm327