int probe() throws IOException {
Logger.log("probe()");
writeUltraUltra2(ULTRA_ULTRA2_COMMAND_INITIALIZE);
byte[] response = readAllMeterData();
Logger.logByteArray("ULTRA_ULTRA2_COMMAND_INITIALIZE response", response);
String responseString = new String(response);
if (response != null
&& response.length > 0
&& responseString.indexOf(ULTRA_ULTRA2_INITIALIZE_RESPONSE_TOKEN) > -1) {
int ultra2SerialNumberEndsWithY = responseString.indexOf(ULTRA2_SERIAL_NUMBER_TOKEN);
Logger.log("ultra2SerialNumberEndsWithY", ultra2SerialNumberEndsWithY);
if (ultra2SerialNumberEndsWithY > ULTRA2_SERIAL_NUMBER_TOKEN_MIN_INDEX) {
return ULTRA2;
} else {
return ULTRA2; // TODO TEST S 0053^M all that is returned? - UK METERS ONLY?
// TEST return ULTRA;
}
} else if (response != null && response.length > 0) {
// noise on the line, often this is 0x00's with an ultra2
// so return now,
// we don't send mini commands in this case
// to avoid the ATE message on ultra2
return METER_UNKOWN;
}
/**
* v3 writeUltraMini( ULTRA_MINI_COMMAND_INITIALIZE_DISCONNECT ); response = readAllMeterData();
* Logger.logByteArray("ULTRA_MINI_COMMAND_INITIALIZE_DISCONNECT response", response); if (
* ArrayHelper.equals( response, COMMAND_INITIALIZE_ACKNOWLEDGEMENT ) ) { return ULTRA_MINI; };
*/
return METER_UNKOWN;
}
private void writeUltraMini(final byte[] b) {
try {
for (int i = 0; i < b.length; i++) {
os.write(b[i]);
}
} catch (Exception e) {
Logger.log(e);
}
}
private void writeUltraUltra2(final byte[] b) {
try {
for (int i = 0; i < b.length; i++) {
os.write(b[i]);
// NB: For Ultra2, if this writes too quickly (10ms sleep),
// ATE errors / ERROR 1 occurs (Instead of PC)
ThreadHelper.sleep(20);
}
} catch (Exception e) {
Logger.log(e);
}
}
// from link layer approach; read all data w/ retries
private byte[] readAllMeterData() {
try {
StopWatch sw = new StopWatch("readAllMeterData()");
ThreadHelper.sleep(INITIAL_SLEEP_WAIT_FOR_METER_TO_BECOME_READY);
int numberOfTimesContinued = 0;
int available = 0;
int maxAvailable = 0;
int timesThroughLoop = 0;
baos.reset();
Logger.log("maxTriesWaitAtEnd (+ interim waits)", MAX_RETRIES * RETRY_SLEEP);
while (numberOfTimesContinued < MAX_RETRIES) {
ThreadHelper.sleep(RETRY_SLEEP);
while ((available = is.available()) > 0) {
// verbose Logger.log("available", available);
maxAvailable = available > maxAvailable ? available : maxAvailable;
int bytesToRead = available >= readBuffer.length ? readBuffer.length - 1 : available;
is.read(readBuffer, 0, bytesToRead);
baos.write(readBuffer, 0, bytesToRead);
numberOfTimesContinued = 0;
timesThroughLoop++;
}
numberOfTimesContinued++;
}
Logger.log("timesThroughLoop", timesThroughLoop);
Logger.log("maxAvailable", maxAvailable);
Logger.log("numberOfTimesContinued", numberOfTimesContinued);
Logger.log("readMeterData()", String.valueOf(baos.size()), sw.getElapsedTimeMessage());
} catch (IOException ex) {
Logger.log(ex);
baos.reset();
} finally {
return baos.toByteArray();
}
}