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914 B
ReStructuredText
24 lines
914 B
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Touch sensor
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===========
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Overview
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--------
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A touch-sensor system is built on a substrate which carries electrodes and relevant connections under a protective flat surface.
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When a user touches the surface, the capacitance variation is triggered and a binary signal is generated to indicate whether the touch is valid.
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ESP32 can provide up to 10 capacitive touch pads / GPIOs. The sensing pads can be arranged in different combinations,
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so that a larger area or more points can be detected. The touch pad sensing process is under the control of a hardware-implemented finite-state machine (FSM) which is initiated by software or a dedicated hardware timer.
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Application Example
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-------------------
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Touch sensor read example: :example:`peripherals/touch_pad_read`.
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Touch sensor interrupt example: :example:`peripherals/touch_pad_interrupt`.
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API Reference
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-------------
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.. include:: /_build/inc/touch_pad.inc
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