Page 244 - Hacking Roomba

Chapter 11 — Connecting Roomba to the Internet 225

There is no username and password combination on either the web interface or the Telnet
interface. You can enable a password on the Telnet configuration interface or disable the
Telnet interface entirely. This doesn’t affect the web interface, which has no password protec-
tion, but you can also disable that interface too.
Be sure to read the XPort documentation thoroughly about configuration, especially if you’re
using Windows.

Using the XPort

When the XPort is configured, using it is just like using the SitePlayer Telenet. The only differ-
ence is the Telnet port. SitePlayer Telnet uses the standard port 23, while XPort uses port 10001.
In lieu of creating a custom circuit board for the XPort, the evaluation board is small enough to
be mounted on the top of Roomba. To supply power, either bring out the 5V from the power
supply in the serial tether and attach it to the 5V input of the evaluation board or build a small
5V power supply.

Going Further with XPort
Lantronix did a smart thing in making their line of embedded device server products similar to
each other. If you choose not to use the XPort, the Micro or Mini modules might be appropri-
ate for you. If you want Wi-Fi connectivity instead of Ethernet, the WiPort or WiMicro mod-
ules are replacements for their Ethernet cousins. The WiPort will be covered in detail in the
next chapter.

Modifying RoombaComm for the Net

You now have Roomba on the Net, but all the code you’ve created thus far has been designed
for the serial port. In Java, as in most modern languages, dealing with serial ports or Ethernet
ports is fairly similar. The RoombaComm library uses that fact to create a new subclass of
the RoombaComm base class that knows how to deal with the TCP telnet port that both the
SitePlayer Telnet and XPort produce. This new subclass is called RoombaCommTCPClient,
and most of it is shown in Listing 11-1.

Listing 11-1: RoombaCommTCPClient

package roombacomm.net;
import roombacomm.*;
public class RoombaCommTCPClient extends RoombaComm
{
String host = null;
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