55 lines
1.9 KiB
Markdown
55 lines
1.9 KiB
Markdown
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# Oneshot
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Oneshot allows faster communication between the Flight Controller and the ESCs that are present on your multirotor.
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It does this in two ways:
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1. Use a signal that varies between 125 µs and 250 µs (instead of the normal PWM timing of 1000µs to 2000µs)
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1. Only send a 'shot' once per flight controller loop, and do this as soon as the flight controller has calculated the required speed of the motors.
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## Supported ESCs
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FlyDuino KISS ESCs are able to use the Oneshot125 protocol out of the box. There is only one soldering needed.
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BLHeli rev13.0 also supports Oneshot125 and will be automatically selected by the ESC without additional work.
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## Supported Boards
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The Naze boards are supported, and have been flight tested in a number of configurations.
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CC3D boards have been tested with a PPM receiver, however parallel PWM receivers might not work properly with this board.
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## Enabling Oneshot
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To configure Oneshot, you must turn off any power to your ESCs.
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It is a good idea at this stage to configure your ESC for oneshot mode (by soldering JP1 in the case of the KISS ESC).
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Connect a USB cable to your board, and connect using the Chrome GUI app.
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Go to the CLI tab, and type the following:
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feature ONESHOT125
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save
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Then you can safely power up your ESCs again.
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## Configuration
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The process for calibrating oneshot ESCs is the same as any other ESC.
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1. Ensure that your ESCs are not powered up.
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1. Connect to the board using a USB cable, and change to the motor test page.
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1. Set the motor speed to maximum using the main slider.
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1. Connect power to your ESCs. They will beep.
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1. Click on the slider to bring the motor speed down to zero. The ESCs will beep again, usually a couple of times.
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1. Disconnect the power from your ESCs.
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1. Re-connect power to your ESCs, and verify that moving the motor slider makes your motors spin up normally.
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## References
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* FlyDuino (<a href="http://flyduino.net/">http://flyduino.net/</a>)
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