turn off autocalibration

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phantomchips
 
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turn off autocalibration

Post by phantomchips »

Hi
I'm trying to set up a touch pad where the user will keep their hand on it for a long time. At the moment the touch keeps auto calibrating and stops recognising the touch. Does anyone know a way to deal with this or how to turn off autocalibration?

I'm using makecode at the moment but I could switch to circuit python if touch is more reliable that way.

thanks

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mikeysklar
 
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Re: turn off autocalibration

Post by mikeysklar »

What does your current makecode look like?

Is it enough to run a loop with "is pressed" versus "not pressed"? Then add your own logic based on "is pressed" duration.

https://learn.adafruit.com/sensors-in-m ... tive-touch

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phantomchips
 
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Re: turn off autocalibration

Post by phantomchips »

That is how I was doing it. I have tried every way in makecode but realised now it's a hardware issue with the auto recalibrate. the hardware recalibrates when the user holds the captouch pad for any length of time. I want my users to hold the pad for 2 minutes. This means that when it auto calibrates while the person is touching it so the touch stops being recognised. Unless there is a way to turn off the autocalibration then it's not going to work with any make code configurations.
From what I have seen, nothing can be done about this. I have now switched to using a teensy which doesn't auto calibrate every minute or so.

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mikeysklar
 
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Re: turn off autocalibration

Post by mikeysklar »

The options I found to manipulate the captouch calibration are to use a manual calibrate or to set thresholds. I don't think either would work well for your scenario of two minute hold.

https://makecode.adafruit.com/learnsyst ... ensitivity

I don't see CircuitPython doing the autocalibration so you could always explore that.

https://learn.adafruit.com/circuitpytho ... -cap-touch

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