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Incorporated logic to auto-calibrate touch sensors 

Works with ESP32, ESP32-S2, and ESP32-S3 (ESP32-C3 does not support Touch Sensors).
This commit is contained in:
Gregg 2022-08-14 18:03:59 -05:00
parent dbcd9e267b
commit e8d40150ed
3 changed files with 29 additions and 9 deletions
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2
src/HomeSpan.cpp
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@ -61,8 +61,6 @@ void Span::begin(Category catID, const char *displayName, const char *hostNameBa
statusLED.init(statusPin,0,autoOffLED);
PushButton::configureTouch(4000,1000,10); // set default parameters for any touch-style pushbuttons
if(requestedMaxCon<maxConnections) // if specific request for max connections is less than computed max connections
maxConnections=requestedMaxCon; // over-ride max connections with requested value

23
src/Utils.cpp
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@ -97,6 +97,21 @@ PushButton::PushButton(int pin, pressTest_t pressed){
else if(pressed==POWERED)
pinMode(pin, INPUT_PULLDOWN);
#if SOC_TOUCH_SENSOR_NUM > 0
else if (pressed==TOUCH && threshold==0){
for(int i=0;i<calibCount;i++)
threshold+=touchRead(pin);
threshold/=calibCount;
#if SOC_TOUCH_VERSION_1
threshold/=2;
Serial.printf("Touch Sensor at pin=%d used for calibration. Triggers when sensor reading < %d.\n",pin,threshold);
#elif SOC_TOUCH_VERSION_2
threshold*=2;
Serial.printf("Touch Sensor at pin=%d used for calibration. Triggers when sensor reading > %d.\n",pin,threshold);
#endif
}
#endif
}
//////////////////////////////////////
@ -209,15 +224,17 @@ void PushButton::reset(){
//////////////////////////////////////
void PushButton::configureTouch(uint16_t measureTime, uint16_t sleepTime, uint16_t thresh){
#ifndef CONFIG_IDF_TARGET_ESP32C3
#if SOC_TOUCH_SENSOR_NUM > 0
touchSetCycles(measureTime,sleepTime);
touchThreshold=thresh;
threshold=thresh;
#endif
}
//////////////////////////////////////
uint16_t PushButton::touchThreshold;
#if SOC_TOUCH_SENSOR_NUM > 0
touch_value_t PushButton::threshold=0;
#endif
////////////////////////////////
// Blinker //

11
src/Utils.h
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@ -80,7 +80,10 @@ class PushButton{
uint32_t longAlarm;
int pressType;
static uint16_t touchThreshold;
#if SOC_TOUCH_SENSOR_NUM > 0
static touch_value_t threshold;
static const int calibCount=20;
#endif
protected:
@ -100,8 +103,10 @@ class PushButton{
static boolean GROUNDED(int pin){return(!digitalRead(pin));}
static boolean POWERED(int pin){return(digitalRead(pin));}
#ifndef CONFIG_IDF_TARGET_ESP32C3
static boolean TOUCH(int pin){return(touchRead(pin)<touchThreshold);}
#if SOC_TOUCH_VERSION_1 // ESP32
static boolean TOUCH(int pin){return(touchRead(pin)<threshold);}
#elif SOC_TOUCH_VERSION_2 // ESP32S2 ESP32S3
static boolean TOUCH(int pin){return(touchRead(pin)>threshold);}
#endif
PushButton(int pin, pressTest_t pressed=GROUNDED);