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Capacitive touch capability is in two places:
On the four alligator clip friendly pads on the Capacitive Touch area on Crickit.
There are also four additional unlabeled capacitive touch pins, Signal Block pins 1-4 are touch capable. |
Capacitive touch is very useful for activating things in your projects.
The following code demonstrates the features of the Crickit cap touch pads.
// Adafruit Crickit Capacitive Touch Demo for Arduino
//
// Displays the value of Adafruit Crickit touchpad values when touched
//
// Tested with the Crickit + micro:bit, all good
#include "Adafruit_Crickit.h"
Adafruit_Crickit crickit;
#define CRICKIT_NUM_TOUCH 4
#define CAPTOUCH_THRESH 500
void setup() {
Serial.begin(9600); // Set up serial monitor - be sure it is set to 9600
Serial.println("Cap Touch Demo");
if(!crickit.begin()) { // Check if Crickit is attached
Serial.println("ERROR Starting crickit"); // If an error, print and
while(1) ; // go to a infinite loop to stop
}
else Serial.println("seesaw started"); // success, we have a Crickit
}
void loop() {
for(int i=0; i<CRICKIT_NUM_TOUCH; i++){ // check each touch input
uint16_t val = crickit.touchRead(i); // read the touch input
if(val > CAPTOUCH_THRESH){ // if the value read is > the threshold
Serial.print("CT"); // print info to serial monitor
Serial.print(i + 1);
Serial.print(" touched! value: ");
Serial.println(val);
}
}
delay(100); // wait tiny bit between checks
}
