EHS5T unexpectedly reboots at irregular intervals | Telit Cinterion IoT Developer Community

Hello!

I tracked down the problem to https communication. I wrote a demo application which reproduces the problem. Application is written in Eclipse, and project set up as described in ehsx_java_userguide pdf. The following MIDlet makes HTTPS GET requests every minute to some https site. I ran it on fresh new EHS5T-RS485 taken out of the box, no further configuration done. ATI1 output is same as in above post.

After 36 requests, so after 36 minutes, EHS5T unexpectedly reboots. Please take time and try to run this application, adapting APN, USER, PASS, DNS to your *****, to verify this behaviour.

Please help me to sort out this problem.

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.microedition.io.Connector;
import javax.microedition.io.HttpsConnection;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class HttpsCrashDemo extends MIDlet implements Runnable {

	private final static String APN = "A1.net";
	private final static String USER = null;
	private final static String PASS = null;
	private final static String DNS = null;
	private final static String URL = "https://httpbin.org/get"; // Any existing site will do

	private final String connString;
	private final Thread t = new Thread(this);

	public HttpsCrashDemo() {
		StringBuffer buf = new StringBuffer();
		buf.append(URL);
		buf.append(";bearer_type=gprs");
		if (APN != null) {
			buf.append(";access_point=");
			buf.append(APN);
		}		
		if (USER != null) {
			buf.append(";username=");
			buf.append(USER); 
		}
		if (PASS != null) {
			buf.append(";password=");
			buf.append(PASS);
		}
		if (DNS != null) {
			buf.append(";dns=");
			buf.append(DNS);
		}
		connString = buf.toString();
	}

	protected void startApp() throws MIDletStateChangeException {
		t.start();
	}

	protected void pauseApp() {
	}

	protected void destroyApp(boolean unconditional)
			throws MIDletStateChangeException {
		notifyDestroyed();
	}

	public void run() {
		int i = 0;
		
		System.out.println("connString: " + connString);

		while (true) {
			HttpsConnection conn = null;
			InputStream is = null;
			int rc = 0;

			try {
				conn = (HttpsConnection) Connector.open(connString);
				rc = conn.getResponseCode();
				if (rc != HttpsConnection.HTTP_OK) {
					throw new IOException("HTTP response code: " + rc);
				}

				is = conn.openInputStream();
				int len = (int) conn.getLength();
				if (len > 0) {
					int actual = 0;
					int bytesread = 0;
					byte[] data = new byte[len];
					while ((bytesread != len) && (actual != -1)) {
						actual = is.read(data, bytesread, len - bytesread);
						bytesread += actual;
					}
					process(data);
				} else {
					int ch;
					ByteArrayOutputStream b = new ByteArrayOutputStream();
					while ((ch = is.read()) != -1) {
						b.write((byte) ch);
					}
					process(b.toByteArray());
				}
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				if (is != null) {
					try {
						Thread.sleep(100);
						is.close();
					} catch (Exception ignore) {
					} finally {
						is = null;
					}
				}
				if (conn != null) {
					try {
						Thread.sleep(100);
						conn.close();
					} catch (Exception ignore) {
					} finally {
						conn = null;
					}
				}
			}

			i++;
			System.out.println("Cycle " + i + ": Sleeping.");
			try {
				Thread.sleep(60000); // 1 minute delay required. 30 seconds delay doesn't crash.
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	private void process(byte[] data) {
		System.out.println("Bytes read: " + data.length);
	}
}

This is Eclipse console output:

Using USB port COM13.

Connecting to module...
Initializing module for debugging...
Establishing "IP connection for remote debugging of EHSx"...
Registering ip address "192.168.244.1" of remote debugging device...
Waiting for debug device registration of "IMP_NG_EHS5_REMOTE"...
Passing control to external device emulator...
Installing suite from: http://192.168.244.2:12731/HttpsCrashDemo.jad
connString: https://httpbin.org/get;bearer_type=gprs;access_point=A1.net
Bytes read: 279
Cycle 1: Sleeping.
Bytes read: 279
Cycle 2: Sleeping.
Bytes read: 279
Cycle 3: Sleeping.
Bytes read: 279
Cycle 4: Sleeping.
Bytes read: 279
Cycle 5: Sleeping.
Bytes read: 279
Cycle 6: Sleeping.
Bytes read: 279
Cycle 7: Sleeping.
Bytes read: 279
Cycle 8: Sleeping.
Bytes read: 279
Cycle 9: Sleeping.
Bytes read: 279
Cycle 10: Sleeping.
Bytes read: 279
Cycle 11: Sleeping.
Bytes read: 279
Cycle 12: Sleeping.
Bytes read: 279
Cycle 13: Sleeping.
Bytes read: 279
Cycle 14: Sleeping.
Bytes read: 279
Cycle 15: Sleeping.
Bytes read: 279
Cycle 16: Sleeping.
Bytes read: 279
Cycle 17: Sleeping.
Bytes read: 279
Cycle 18: Sleeping.
Bytes read: 279
Cycle 19: Sleeping.
Bytes read: 279
Cycle 20: Sleeping.
Bytes read: 279
Cycle 21: Sleeping.
Bytes read: 279
Cycle 22: Sleeping.
Bytes read: 279
Cycle 23: Sleeping.
Bytes read: 279
Cycle 24: Sleeping.
Bytes read: 279
Cycle 25: Sleeping.
Bytes read: 279
Cycle 26: Sleeping.
Bytes read: 279
Cycle 27: Sleeping.
Bytes read: 279
Cycle 28: Sleeping.
Bytes read: 279
Cycle 29: Sleeping.
Bytes read: 279
Cycle 30: Sleeping.
Bytes read: 279
Cycle 31: Sleeping.
Bytes read: 279
Cycle 32: Sleeping.
Bytes read: 279
Cycle 33: Sleeping.
Bytes read: 279
Cycle 34: Sleeping.
Bytes read: 279
Cycle 35: Sleeping.
Bytes read: 279
Cycle 36: Sleeping.

End of debug session. Emulator is closed!