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APM 2.0 Optical Flow

Posted by Gareth Evans on November 14, 2012 at 6:52pm

Can someone confirm if OF_Loiter and the OF sensor available on the DIY Drones store works with the APM 2.0 (not 2.5)

The wiki is ambiguous  there's a wiring diagram for the APM 2.0; but the comments say it doesn't work due to a difference in voltage (3.3v vs 5.0v) and that the next hardware revision is required.

The OF test feature in the console seems to give data when you wire the sensor as per the diagram, but I am unsure if OF_Loiter is implemented in 2.8.1 and if it isn't, whether the OF sensor is used in any flight modes.

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Replies

  • Thomas the Nerd November 16, 2012 at 2:16pm

    The optical flow sensor DOES work on the APM 2.0 board. However, due to an incompatibility between the sensor and the APM logic, it's not simply "plug and play" like the sonar.

    Just follow the diagram, and it will work. You will have to solder three wires onto the indicated spots on the board; with a decent soldering iron and the right tip, this is easy (hot iron, like 700F, and a small tip. this makes for a very quick job)

    It seems that a lot of the wiki comments are outdated or otherwise confusing.

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