An example trackpoint including course, speed and accuracy estimates:
<trkpt lat="50.5710623" lon="-2.4563484">
<ele>7.90</ele>
<time>2022-04-11T10:16:01Z</time>
<course>157.19</course>
<speed>0.543</speed>
<hacc>2.0</hacc>
<vacc>4.0</vacc>
<cacc>5.0</cacc>
<sacc>0.5</sacc>
</trkpt>
The new <src> element of GPX 1.1.1 is a “mixed” type to provide forwards and backwards compatibility with GPX 1.1.
Example of a custom-built GPS logger using a Beitian BE-280 / u-blox M10:
<trk>
<src>
ESP-GPS
<hardware>
<manufacturer>Beitian</manufacturer>
<product>BE-280</product>
<name>K888 ESP</name>
</hardware>
<software>
<application>ESP-GPS</application>
<link href="https://github.com/RP6conrad/ESP-GPS-Logger" />
<version>5.75</version>
</software>
</src>
<trkseg>...</trkseg>
</trk>
Example third party phone / watch app:
<trk>
<src>
Samsung Galaxy A53
<hardware>
<manufacturer>Samsung</manufacturer>
<product>Galaxy A53</product>
<model>SM-A536BZKNEUB</model>
<serial>ABCDE9ABC9X</serial>
<name>Mike's A53</name>
<version>android13-5.10.136</version>
</hardware>
<software>
<developer>barbeauDev</developer>
<application>GPSTest</application>
<link href="https://github.com/barbeau/gpstest">
<text>GitHub</text>
</link>
<link href="https://play.google.com/store/apps/details?id=com.android.gpstest">
<text>Google Play</text>
</link>
<link href="https://f-droid.org/packages/com.android.gpstest.osmdroid/">
<text>F-Droid</text>
</link>
<version>3.10.3</version>
</software>
</src>
<trkseg>...</trkseg>
</trk>