How to make Capacitive sensors in Pyboard

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Shafagh777
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Joined: Fri Feb 19, 2021 5:02 pm

How to make Capacitive sensors in Pyboard

Post by Shafagh777 » Fri Mar 26, 2021 11:37 am

To make a Capacitive Touch Sensor using GPIO in Arduino, I have seen the following tutorial:

https://www.youtube.com/watch?v=BHQPqQ_5ulc

However, how to do this procedure in pyboard?
is there any specific library for it?

Shafagh777
Posts: 6
Joined: Fri Feb 19, 2021 5:02 pm

Re: How to make Capacitive sensors in Pyboard

Post by Shafagh777 » Fri Mar 26, 2021 2:02 pm

Here is the Arduino code:

/*
CapacitiveSense.h - Capacitive Sensing Library for 'duino / Wiring
https://github.com/PaulStoffregen/CapacitiveSensor
http://www.pjrc.com/teensy/td_libs_Capa ... ensor.html
http://playground.arduino.cc/Main/CapacitiveSensor
Copyright (c) 2009 Paul Bagder
Updates for other hardare by Paul Stoffregen, 2010-2016
vim: set ts=4:
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/

// ensure this library description is only included once
#ifndef CapacitiveSensor_h
#define CapacitiveSensor_h

#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

// Direct I/O through registers and bitmask (from OneWire library)

#if defined(__AVR__)
#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin)))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint8_t
#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) &= ~(mask), (*((base)+2)) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+1)) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base)+2)) &= ~(mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+2)) |= (mask))

#elif defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK66FX1M0__) || defined(__MK64FX512__)
#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
#define PIN_TO_BITMASK(pin) (1)
#define IO_REG_TYPE uint8_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (*((base)+512))
#define DIRECT_MODE_INPUT(base, mask) (*((base)+640) = 0)
#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+640) = 1)
#define DIRECT_WRITE_LOW(base, mask) (*((base)+256) = 1)
#define DIRECT_WRITE_HIGH(base, mask) (*((base)+128) = 1)

#elif defined(__MKL26Z64__)
#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint8_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) ((*((base)+16) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) (*((base)+20) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+20) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) (*((base)+8) = (mask))
#define DIRECT_WRITE_HIGH(base, mask) (*((base)+4) = (mask))

#elif defined(__IMXRT1052__) || defined(__IMXRT1062__)
#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) ((*((base)+2) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) (*((base)+1) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+1) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) (*((base)+34) = (mask))
#define DIRECT_WRITE_HIGH(base, mask) (*((base)+33) = (mask))

#elif defined(__SAM3X8E__)
#define PIN_TO_BASEREG(pin) (&(digitalPinToPort(pin)->PIO_PER))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (((*((base)+15)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base)+5)) = (mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+4)) = (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base)+13)) = (mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+12)) = (mask))

#elif defined(__PIC32MX__)
#define PIN_TO_BASEREG(pin) (portModeRegister(digitalPinToPort(pin)))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (((*(base+4)) & (mask)) ? 1 : 0) //PORTX + 0x10
#define DIRECT_MODE_INPUT(base, mask) ((*(base+2)) = (mask)) //TRISXSET + 0x08
#define DIRECT_MODE_OUTPUT(base, mask) ((*(base+1)) = (mask)) //TRISXCLR + 0x04
#define DIRECT_WRITE_LOW(base, mask) ((*(base+8+1)) = (mask)) //LATXCLR + 0x24
#define DIRECT_WRITE_HIGH(base, mask) ((*(base+8+2)) = (mask)) //LATXSET + 0x28

#elif defined(ARDUINO_ARCH_ESP8266)
#define PIN_TO_BASEREG(pin) ((volatile uint32_t*) GPO)
#define PIN_TO_BITMASK(pin) (1 << pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) ((GPI & (mask)) ? 1 : 0) //GPIO_IN_ADDRESS
#define DIRECT_MODE_INPUT(base, mask) (GPE &= ~(mask)) //GPIO_ENABLE_W1TC_ADDRESS
#define DIRECT_MODE_OUTPUT(base, mask) (GPE |= (mask)) //GPIO_ENABLE_W1TS_ADDRESS
#define DIRECT_WRITE_LOW(base, mask) (GPOC = (mask)) //GPIO_OUT_W1TC_ADDRESS
#define DIRECT_WRITE_HIGH(base, mask) (GPOS = (mask)) //GPIO_OUT_W1TS_ADDRESS

#elif defined(ARDUINO_ARCH_ESP32)
#include <driver/rtc_io.h>
#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) (pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_BASE_ATTR
#define IO_REG_MASK_ATTR

static inline __attribute__((always_inline))
IO_REG_TYPE directRead(IO_REG_TYPE pin)
{
if ( pin < 32 )
return (GPIO.in >> pin) & 0x1;
else if ( pin < 40 )
return (GPIO.in1.val >> (pin - 32)) & 0x1;

return 0;
}

static inline __attribute__((always_inline))
void directWriteLow(IO_REG_TYPE pin)
{
if ( pin < 32 )
GPIO.out_w1tc = ((uint32_t)1 << pin);
else if ( pin < 34 )
GPIO.out1_w1tc.val = ((uint32_t)1 << (pin - 32));
}

static inline __attribute__((always_inline))
void directWriteHigh(IO_REG_TYPE pin)
{
if ( pin < 32 )
GPIO.out_w1ts = ((uint32_t)1 << pin);
else if ( pin < 34 )
GPIO.out1_w1ts.val = ((uint32_t)1 << (pin - 32));
}

static inline __attribute__((always_inline))
void directModeInput(IO_REG_TYPE pin)
{
if ( digitalPinIsValid(pin) )
{
uint32_t rtc_reg(rtc_gpio_desc[pin].reg);

if ( rtc_reg ) // RTC pins PULL settings
{
ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].mux);
ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].pullup | rtc_gpio_desc[pin].pulldown);
}

if ( pin < 32 )
GPIO.enable_w1tc = ((uint32_t)1 << pin);
else
GPIO.enable1_w1tc.val = ((uint32_t)1 << (pin - 32));

uint32_t pinFunction((uint32_t)2 << FUN_DRV_S); // what are the drivers?
pinFunction |= FUN_IE; // input enable but required for output as well?
pinFunction |= ((uint32_t)2 << MCU_SEL_S);

ESP_REG(DR_REG_IO_MUX_BASE + esp32_gpioMux[pin].reg) = pinFunction;

GPIO.pin[pin].val = 0;
}
}

static inline __attribute__((always_inline))
void directModeOutput(IO_REG_TYPE pin)
{
if ( digitalPinIsValid(pin) && pin <= 33 ) // pins above 33 can be only inputs
{
uint32_t rtc_reg(rtc_gpio_desc[pin].reg);

if ( rtc_reg ) // RTC pins PULL settings
{
ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].mux);
ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].pullup | rtc_gpio_desc[pin].pulldown);
}

if ( pin < 32 )
GPIO.enable_w1ts = ((uint32_t)1 << pin);
else // already validated to pins <= 33
GPIO.enable1_w1ts.val = ((uint32_t)1 << (pin - 32));

uint32_t pinFunction((uint32_t)2 << FUN_DRV_S); // what are the drivers?
pinFunction |= FUN_IE; // input enable but required for output as well?
pinFunction |= ((uint32_t)2 << MCU_SEL_S);

ESP_REG(DR_REG_IO_MUX_BASE + esp32_gpioMux[pin].reg) = pinFunction;

GPIO.pin[pin].val = 0;
}
}

#define DIRECT_READ(base, pin) directRead(pin)
#define DIRECT_WRITE_LOW(base, pin) directWriteLow(pin)
#define DIRECT_WRITE_HIGH(base, pin) directWriteHigh(pin)
#define DIRECT_MODE_INPUT(base, pin) directModeInput(pin)
#define DIRECT_MODE_OUTPUT(base, pin) directModeOutput(pin)
// https://github.com/PaulStoffregen/OneWire/pull/47
// https://github.com/stickbreaker/OneWire ... eb6829f82c
#ifdef interrupts
#undef interrupts
#endif
#ifdef noInterrupts
#undef noInterrupts
#endif
#define noInterrupts() {portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED;portENTER_CRITICAL(&mux)
#define interrupts() portEXIT_CRITICAL(&mux);}
//#warning, code is copied from "ESP32 OneWire testing"

#elif defined(__SAMD21G18A__)
// runs extremely slow/unreliable on Arduino Zero - help wanted....
#define PIN_TO_BASEREG(pin) portModeRegister(digitalPinToPort(pin))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (((*((base)+8)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) = (mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+2)) = (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base)+5)) = (mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+6)) = (mask))

#elif defined(__SAMD51__)
#define PIN_TO_BASEREG(pin) portModeRegister(digitalPinToPort(pin))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (((*((base)+8)) & (mask)) ? 1 : 0) // IN
#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) = (mask)) // DIRCLR
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+2)) = (mask)) // DIRSET
#define DIRECT_WRITE_LOW(base, mask) ((*((base)+5)) = (mask)) // OUTCLR
#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+6)) = (mask)) /// OUTSET

#elif defined(ARDUINO_NRF52_ADAFRUIT) || defined(ARDUINO_ARCH_NRF52840)

/*
Required for the Arduino Nano 33 BLE Sense to satisfy the compiler
as build.f_cpu is not defined in the boards.txt file.
The concept of F_CPU doesn't fully apply as mbed RTOS is used which uses preemption.
*/
#if defined(ARDUINO_ARCH_NRF52840) && !defined(F_CPU)
#define F_CPU 64000000L
#endif

#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) digitalPinToPinName(pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, pin) nrf_gpio_pin_read(pin)
#define DIRECT_WRITE_LOW(base, pin) nrf_gpio_pin_clear(pin)
#define DIRECT_WRITE_HIGH(base, pin) nrf_gpio_pin_set(pin)
#define DIRECT_MODE_INPUT(base, pin) nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL)
#define DIRECT_MODE_OUTPUT(base, pin) nrf_gpio_cfg_output(pin)

#elif defined(RBL_NRF51822)
#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) (pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, pin) nrf_gpio_pin_read(pin)
#define DIRECT_WRITE_LOW(base, pin) nrf_gpio_pin_clear(pin)
#define DIRECT_WRITE_HIGH(base, pin) nrf_gpio_pin_set(pin)
#define DIRECT_MODE_INPUT(base, pin) nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL)
#define DIRECT_MODE_OUTPUT(base, pin) nrf_gpio_cfg_output(pin)

#elif defined(__arc__)

#include "scss_registers.h"
#include "portable.h"
#include "avr/pgmspace.h"

#define GPIO_ID(pin) (g_APinDescription[pin].ulGPIOId)
#define GPIO_TYPE(pin) (g_APinDescription[pin].ulGPIOType)
#define GPIO_BASE(pin) (g_APinDescription[pin].ulGPIOBase)
#define DIR_OFFSET_SS 0x01
#define DIR_OFFSET_SOC 0x04
#define EXT_PORT_OFFSET_SS 0x0A
#define EXT_PORT_OFFSET_SOC 0x50

/* GPIO registers base address */
#define PIN_TO_BASEREG(pin) ((volatile uint32_t *)g_APinDescription[pin].ulGPIOBase)
#define PIN_TO_BITMASK(pin) pin
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM

static inline __attribute__((always_inline))
IO_REG_TYPE directRead(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
{
IO_REG_TYPE ret;
if (SS_GPIO == GPIO_TYPE(pin)) {
ret = READ_ARC_REG(((IO_REG_TYPE)base + EXT_PORT_OFFSET_SS));
} else {
ret = MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, EXT_PORT_OFFSET_SOC);
}
return ((ret >> GPIO_ID(pin)) & 0x01);
}

static inline __attribute__((always_inline))
void directModeInput(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
{
if (SS_GPIO == GPIO_TYPE(pin)) {
WRITE_ARC_REG(READ_ARC_REG((((IO_REG_TYPE)base) + DIR_OFFSET_SS)) & ~(0x01 << GPIO_ID(pin)),
((IO_REG_TYPE)(base) + DIR_OFFSET_SS));
} else {
MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, DIR_OFFSET_SOC) &= ~(0x01 << GPIO_ID(pin));
}
}

static inline __attribute__((always_inline))
void directModeOutput(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
{
if (SS_GPIO == GPIO_TYPE(pin)) {
WRITE_ARC_REG(READ_ARC_REG(((IO_REG_TYPE)(base) + DIR_OFFSET_SS)) | (0x01 << GPIO_ID(pin)),
((IO_REG_TYPE)(base) + DIR_OFFSET_SS));
} else {
MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, DIR_OFFSET_SOC) |= (0x01 << GPIO_ID(pin));
}
}

static inline __attribute__((always_inline))
void directWriteLow(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
{
if (SS_GPIO == GPIO_TYPE(pin)) {
WRITE_ARC_REG(READ_ARC_REG(base) & ~(0x01 << GPIO_ID(pin)), base);
} else {
MMIO_REG_VAL(base) &= ~(0x01 << GPIO_ID(pin));
}
}

static inline __attribute__((always_inline))
void directWriteHigh(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
{
if (SS_GPIO == GPIO_TYPE(pin)) {
WRITE_ARC_REG(READ_ARC_REG(base) | (0x01 << GPIO_ID(pin)), base);
} else {
MMIO_REG_VAL(base) |= (0x01 << GPIO_ID(pin));
}
}

#define DIRECT_READ(base, pin) directRead(base, pin)
#define DIRECT_MODE_INPUT(base, pin) directModeInput(base, pin)
#define DIRECT_MODE_OUTPUT(base, pin) directModeOutput(base, pin)
#define DIRECT_WRITE_LOW(base, pin) directWriteLow(base, pin)
#define DIRECT_WRITE_HIGH(base, pin) directWriteHigh(base, pin)


#elif defined(ARDUINO_ARCH_STM32)

#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) (pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM

#define DIRECT_READ(base, pin) digitalRead(pin)
#define DIRECT_MODE_INPUT(base, pin) pinMode(pin,INPUT)
#define DIRECT_MODE_OUTPUT(base, pin) pinMode(pin,OUTPUT)
#define DIRECT_WRITE_LOW(base, pin) digitalWrite(pin, LOW)
#define DIRECT_WRITE_HIGH(base, pin) digitalWrite(pin, HIGH)

#elif defined(ARDUINO_ARCH_APOLLO3)
#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) (pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (am_hal_gpio_input_read(mask))
#define DIRECT_MODE_INPUT(base, mask) (am_hal_gpio_pinconfig(mask, g_AM_HAL_GPIO_INPUT))
#define DIRECT_MODE_OUTPUT(base, mask) (am_hal_gpio_pinconfig(mask, g_AM_HAL_GPIO_OUTPUT))
#define DIRECT_WRITE_LOW(base, mask) (am_hal_gpio_output_clear(mask))
#define DIRECT_WRITE_HIGH(base, mask) (am_hal_gpio_output_set(mask))

#endif

// some 3.3V chips with 5V tolerant pins need this workaround
//
#if defined(__MK20DX256__)
#define FIVE_VOLT_TOLERANCE_WORKAROUND
#endif

// library interface description
class CapacitiveSensor
{
// user-accessible "public" interface
public:
// methods
CapacitiveSensor(uint8_t sendPin, uint8_t receivePin);
long capacitiveSensorRaw(uint8_t samples);
long capacitiveSensor(uint8_t samples);
void set_CS_Timeout_Millis(unsigned long timeout_millis);
void reset_CS_AutoCal();
void set_CS_AutocaL_Millis(unsigned long autoCal_millis);
// library-accessible "private" interface
private:
// variables
int error;
unsigned long leastTotal;
unsigned int loopTimingFactor;
unsigned long CS_Timeout_Millis;
unsigned long CS_AutocaL_Millis;
unsigned long lastCal;
unsigned long total;
IO_REG_TYPE sBit; // send pin's ports and bitmask
volatile IO_REG_TYPE *sReg;
IO_REG_TYPE rBit; // receive pin's ports and bitmask
volatile IO_REG_TYPE *rReg;
// methods
int SenseOneCycle(void);
};

#endif

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pythoncoder
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Re: How to make Capacitive sensors in Pyboard

Post by pythoncoder » Sat Mar 27, 2021 9:43 am

Some hardware devices provide for capacitive sensing. For example the ESP32 has this capability, but only on certain pins. As far as I know the STM processors lack this feature. There are add-on boards which provide this.
Peter Hinch
Index to my micropython libraries.

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scruss
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Re: How to make Capacitive sensors in Pyboard

Post by scruss » Sat Mar 27, 2021 3:09 pm

There is an Arduino library that hacks limited cap touch capability into regular STM32s, but there's no MicroPython port: arpruss/ADCTouchSensor: capacitive touch detection without external hardware for AVR and STM32.

It works quite well with the cheap STM32F103 boards I've tried, but note that it has no static protection. If you live in a dry, cold country like Canada, you will zap boards if you use this in winter without ESD protection. I've used it as a cheap and open replacement for Makey Makey projects, and it does that quite well if you can work within its limitations.

Otherwise, an MPR121 module brings real capacitive touch via I²C

Shafagh777
Posts: 6
Joined: Fri Feb 19, 2021 5:02 pm

Re: How to make Capacitive sensors in Pyboard

Post by Shafagh777 » Mon Mar 29, 2021 8:38 am

Thank you all for your quick responses. I have found also AT42QT1070 5-Pad Standalone Capacitive Touch Sensor Breakout Module. how about this one?

ArdentOfZeal
Posts: 1
Joined: Mon Sep 06, 2021 2:42 am

Re: How to make Capacitive sensors in Pyboard

Post by ArdentOfZeal » Mon Sep 06, 2021 3:11 am

Shafagh777 wrote:
Fri Mar 26, 2021 11:37 am
However, how to do this procedure in pyboard?
is there any specific library for it?
I have been looking for the same things recently. Found this example with a rasp Pi 2. https://pimylifeup.com/raspberry-pi-pressure-pad/. They use some pressure pad module but from what I can tell, that is irrelevant. Hope it helps!

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scruss
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Re: How to make Capacitive sensors in Pyboard

Post by scruss » Wed Sep 15, 2021 12:13 am

ArdentOfZeal wrote:
Mon Sep 06, 2021 3:11 am
I have been looking for the same things recently. Found this example with a rasp Pi 2. https://pimylifeup.com/raspberry-pi-pressure-pad/. They use some pressure pad module but from what I can tell, that is irrelevant. Hope it helps!
That's a FSR. It's not even remotely a capacitive sensor.

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