24 lines
1.3 KiB
Markdown
24 lines
1.3 KiB
Markdown
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title = "Configuring a switch as a relay"
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weight = 3
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sort_by = "weight"
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insert_anchor_links = "right"
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If you want to connect a relay of some sort (something that accepts a low/high signal) to a PWM output (the servo outputs), you need to do a few quick things. The actual numbers will vary depending on your FC, but here's what worked for me with a Matek F405-Wing:
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1. Set the channel you want the relay to trigger on as a controller for the first relay (here I'll assume you want to control the first relay on channel 11):
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`RC11_OPTION=28`
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2. Set the pin number for the relay you want to control. This is a bit fuzzy, it depends on your flight controller, but try a few out. This is what worked for me, for S6 on my F405-Wing:
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`RELAY_PIN=55`
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3. Set a servo to act as a GPIO output. I'm assuming here you want `SERVO6`, though I'm not quite sure how the servo selection maps to the `RELAY_PIN` selection above. For me, `AUXOUT6` and `SERVO6` worked:
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`SERVO6_FUNCTION=-1`
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If you're amazingly lucky, you should be all set. If not, you need to play with the `50` in the `RELAY_PIN` parameter and the `6` in the `SERVO6_FUNCTION` until something works.
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* * *
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<p style="font-size:80%; font-style: italic">
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Last updated on September 11, 2021. For any questions/feedback,
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email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
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</p>
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