Class TouchPad – Touch

ESP32 provides up to 10 capacitive sensing GPIOs, capable of detecting differences in capacitance caused by direct contact or proximity of fingers or other objects.

Create object

class TouchPad.TouchPad(Pin)

Create a TouchPad object associated with the set pin.

• Pin - available pins are：

Capacitive sensing signal name	ESP32 GPIO	Pin on mPython Board	Remark
TOUCH0	GPIO4	P28/Touch_N
TOUCH1	GPIO0	P5/Button_A	Pin pull-up cannot be used
TOUCH2	GPIO2	P11/Button_B	Pin pull-up cannot be used
TOUCH3	GPIO15	P27/Touch_O
TOUCH4	GPIO13	P26/Touch_H
TOUCH5	GPIO12	P25/Touch_T
TOUCH6	GPIO14	P24/Touch_Y
TOUCH7	GPIO27	P23/Touch_P
TOUCH8	GPIO33	P0
TOUCH9	GPIO32	P1

Note

ESP32 has 10 touch sensors. The control panel has 8 touch functions, 6 of which lead to the touch panel on the front of the control panel. For details, see 掌控板引脚定义 。

Example:

from machine import TouchPad, Pin

tp = TouchPad(Pin(14))

Method

TouchPad.read()

Read TouchPad level。

TouchPad.read Returns the value relative to the capacitive variable. When touched, it is a small number(usually within 10 ),when there is no touch, it is a large number (greater than 1000) is usual. However, these values are “relative” and can vary depending on the circuit board and surroundings, so some calibration may be required. Note that if other non-touch pins are called, it will cause ValueError .

TouchPad.config(value)

Set the touchpad threshold

• value 整数