Rover Help Using Ardumoto and Adafruit Ultimate Shield

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jfd7851
 
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Rover Help Using Ardumoto and Adafruit Ultimate Shield

Post by jfd7851 »

I am building a rover for a school project that runs on Arduino ardumoto and Adafruit Ultimate GPS shield. I can drive the rover and I can receive the information from the GPS from the great tutorials on this site. My main problem is combining the two functions. My project involves this rover moving from a random GPS coordinate to a predetermined GPS coordinate. I know I need to use bearings and waypoints along with some control logic. I really just don't where to start when it comes to combining the two functions instead of both independently on separate sketches.

Any help would be greatly appreciated.

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Re: Rover Help Using Ardumoto and Adafruit Ultimate Shield

Post by adafruit_support_bill »

Is the GPS your only sensor? Do you have a magnetometer to determine your orientation? What about obstacle avoidance? Is that a requirement as well?

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jfd7851
 
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Re: Rover Help Using Ardumoto and Adafruit Ultimate Shield

Post by jfd7851 »

None of those. Just a GPS.

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Re: Rover Help Using Ardumoto and Adafruit Ultimate Shield

Post by jfd7851 »

I guess to condense my question down, I can summarize it a little more. I want to use the haversine formula to calculate the distance between some points, but I am lost on how I assign the variable of current GPS coordinates and endpoint GPS coordinates within an Arduino sketch. I can see that the Adafruit processes all of the GPS information, but I need to understand how to use the information from the GPS within an Arduino sketch.

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Re: Rover Help Using Ardumoto and Adafruit Ultimate Shield

Post by adafruit_support_bill »

There are a few ways to approach it. If you know the current position and target position, then you know the heading you need to follow to get there. The problem is, you can't calculate heading via GPS unless you are moving. So you start moving.

As you are moving:
1 - you recalculate your current heading.
2 - you recalculate your target heading.
3 - you turn if necessary to correct for any heading error.
- repeat steps 1-3 until you reach your destination.

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