Jim McC.

Member Since: December 6, 2009

Country: United States

  • Table 7 defines the fields returned by the GPS in the VTG sentence. According to the datasheet the GPS will transmit all sentences specified in Table 1. Your software just needs to parse the incoming datastream and when it finds Message Id $GPVTG parse the fields for that sentence up to the End of Message characters.

  • A little late with the info, but maybe you can use it anyway. There is a a type of hand warmer that needs no oxygen. They are plastic pouches which contain a water and sodium acetate solution. You snap a small disk in the pouch, squeeze it around, and presto changeo you have heat. We used to use them motorcycling in cold weather. We had sizes from small for inside gloves, to large to zip inside your riding jacket across your belly. An example of these are at http://www.hotsnapz.com. I have no experience with this brand and am not specifically recommending them, but the concept is the same as the ones we used.

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