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Data Hacking

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238 Part III — <strong>Data</strong> <strong>Hacking</strong><br />

Doing this brings up a Properties window filled with settings, as shown in Figure 10-23.<br />

FIGURE 10-23: The NMEATime Properties window<br />

There are several settings on the GPS Configuration tab that will be of interest to you. The<br />

first is Comm Settings (see Figure 10-24). Clicking this brings up the Communication<br />

Settings dialog box, from which you can select the appropriate Comm port and baud rate, or<br />

communication speed (as shown in Figure 10-25). The standard speed for NMEA communication<br />

is 4800 bps.<br />

FIGURE 10-24: NMEATime port settings<br />

You can also choose which part of the protocol (or more accurately, which NMEA message<br />

contained within the NMEA sentence) is used to get the time information (see Figure 10-26).<br />

Of the three NMEA messages to choose from, I recommend that you use the first or second to<br />

ensure compatibility:

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