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POGet Printer Status Using SNMP OID
 

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    <p>I am working with SNMP in Android. I want to get Printer Status. I am using <strong>Snmp4Android.jar</strong> and OID <strong>1.3.6.1.2.1.25.3.5.1.1</strong>. Please refer this link <a href="https://secure.n-able.com/webhelp/NC_7-2-0_Cust_en/Content/N-central/Services/Services_PrinterStatus.html" rel="nofollow">Printer Status</a>.</p> <p>SnmpActivity.java here</p> <pre><code>public class SnmpActivity extends Activity { private static String ipAddress = "PrinterIP"; private static String port = "Port"; private static String oidValue = "1.3.6.1.2.1.25.3.5.1.1"; public static Snmp snmp; public static CommunityTarget comtarget; static PDU pdu; static OID oid; static VariableBinding req; Button b; private static final String tag = "SNMP CLIENT"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); System.setProperty("java.net.preferIPv4Stack", "true"); System.setProperty("java.net.preferIPv6Addresses", "false"); b = (Button) findViewById(R.id.buttonClick); b.setOnClickListener(new OnClickListener() { public void onClick(View v) { try { sendSnmpRequest(oidValue); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } }); } private void sendSnmpRequest(String oid) throws Exception { ResponseEvent response; OctetString community1 = new OctetString("public"); String host = ipAddress + "/" + port; Address tHost = new UdpAddress(host); TransportMapping transport = new DefaultUdpTransportMapping(); transport.listen(); CommunityTarget comtarget = new CommunityTarget(); comtarget.setCommunity(community1); comtarget.setVersion(SnmpConstants.version1); comtarget.setAddress(tHost); comtarget.setRetries(2); comtarget.setTimeout(5000); PDU pdu = new PDU(); pdu.add(new VariableBinding(new OID(oid))); pdu.setType(PDU.GET); snmp = new Snmp(transport); response = snmp.get(pdu, comtarget); if (response != null) { Log.i(tag, "Got Response from Agent " + response.getResponse().toString()); PDU responsePDU = response.getResponse(); if (responsePDU != null) { int errorStatus = responsePDU.getErrorStatus(); int errorIndex = responsePDU.getErrorIndex(); String errorStatusText = responsePDU.getErrorStatusText(); if (errorStatus == PDU.noError) { Log.i(tag, "Snmp Get Response = " + responsePDU.getVariableBindings()); Toast.makeText( getApplicationContext(), "Snmp Get Response = " + responsePDU.getErrorStatusText(), Toast.LENGTH_LONG).show(); System.out .println("--" + responsePDU.getVariableBindings()); } else { Log.i((String) tag, "Error: Request Failed"); Log.i(tag, "Error Status = " + errorStatus); Log.i(tag, "Error Index = " + errorIndex); Log.i(tag, "Error Status Text = " + errorStatusText); } } else { Log.i(tag, "Error: Response PDU is null"); } } else { Log.i(tag, "Error: Agent Timeout... "); } snmp.close(); } </code></pre> <p>Thanks...</p>
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    1. COWhat is the output of your code now?
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    2. COif (errorStatus == PDU.noError) this is not working else part of this if condition is now showing ie, Log.i((String) tag, "Error: Request Failed"); Log.i(tag, "Error Status = " + errorStatus); Log.i(tag, "Error Index = " + errorIndex); Log.i(tag, "Error Status Text = " + errorStatusText);
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    3. COAnd what is the error status, index and text? Problems with communication over SNMP can have multiple reasons, most likely firewall blocking udp port 161, device not listening on that port, wrong community string, ...
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