I am trying to build a keyboard for MD patients. I have only five force sensors, each sensor encodes 4 letters (20 in total), which means I am missing 6 letters. I thought of using double-click, for example: one click= 'A', double-click='B'. I have found the following code: Code to detect single or double click - #13 by gerivega
However, when trying to change from DigitalRead to AnalogRead and add a threshold, the code is unable to work (type). I have also tried using the library OneButton but it has the same issue(digitalRead).
Does anyone have a suggestion on what to do?
Example of my current code for two sensors, where each sensor types four letters letter per click for each direction :
#include <Keyboard.h>
const int threshold = 800;
int up4 = 0;
int down4 = 0;
int right4 = 0;
int left4 = 0;
int up5 = 0;
int down5 = 0;
int right5 = 0;
int left5 = 0;
int yellow4= A0; // down
int white4 = A1;//left
int red4 = A2;//up
int blue4 = A3;//right
int yellow5=A4;//down
int white5= A5;//left
int red5= A6;//up
int blue5 = A7;//right
void setup()
{
pinMode(red4, INPUT);
pinMode(blue4, INPUT);
pinMode(white4, INPUT);
pinMode(yellow4, INPUT);
pinMode(red5, INPUT);
pinMode(blue5, INPUT);
pinMode(white5, INPUT);
pinMode(yellow5, INPUT);
Serial.begin(9600);
Keyboard.begin();
}
void loop()
{
int up4 = analogRead(red4);
int right4 = analogRead(blue4);
int down4 = analogRead(yellow4);
int left4 = analogRead(white4);
int up5 = analogRead(red5);
int right5 = analogRead(blue5);
int down5=analogRead(yellow5);
int left5 = analogRead(white5);
if (right4>threshold & up4<threshold & down4<threshold & left4<threshold){
Serial.println("right4");
Keyboard.write('L');
delay(300);
Keyboard.releaseAll();
}
if (right5>threshold & up5<threshold & down5<threshold & left5<threshold){
Serial.println("right5");
Keyboard.write('Y');
delay(300);
Keyboard.releaseAll();
}
if (right4<threshold & up4>threshold & down4<threshold & left4<threshold){
Serial.println("up4");
Keyboard.write('M');
delay(300);
Keyboard.releaseAll();
}
if (right5<threshold & up5>threshold & down5<threshold & left5<threshold){
Serial.println("up5");
Keyboard.write('R');
delay(300);
Keyboard.releaseAll();
}
if (right4<threshold & up4<threshold & down4>threshold & left4<threshold){
Serial.println("down4");
Keyboard.write('N');
delay(300);
Keyboard.releaseAll();
}
if (right5<threshold & up5<threshold & down5>threshold & left5<threshold){
Serial.println("down5");
Keyboard.write('Z');
delay(300);
Keyboard.releaseAll();
}
if (right4<threshold & up4<threshold & down4<threshold & left4>threshold){
Serial.println("left4");
Keyboard.write('O');
delay(300);
Keyboard.releaseAll();
}
if (right5<threshold & up5<threshold & down5<threshold & left5>threshold){
Serial.println("left5");
Keyboard.write('P');
delay(300);
Keyboard.releaseAll();
}
}
