Picaxe to Humminbird 700 series Fishfinder GPS?

mikeyBoo

Senior Member
hi folks,
Trying not to reinvent the wheel here (hoping this is a road someone else has already been down).
Has anyone successfully connected a Picaxe to a Humminbird 700 series GPS fishfinder?
If so, would you mind sharing what you've learned?

My yak already has a 20M2 controlling the trolling motor speed & steering, but I would like to extract the NMEA data from the Humminbird to have the yak automatically follow a heading (crossing big water in a straight line) & be able to use waypoints (set on the Picaxe display) to travel from point to point.

Once I get the position & heading data, the Picaxe should be able to bump the left/right steering outputs to track a course.

Here's a little info:
http://www.humminbird.com/uploadedFiles/Content/Category/Support/FAQ/NMEA700I.pdf
 
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