The below code is some tinkering I am doing on this thread
but I open a new topic because my simulation (work in progress) started to behave oddly.
You will see an enum, where in desperation I assigned the values that would be automatically assigned.
You will see a switch/case with a duplicate case label (2, or want1).
You will get the expected error if you verify or try to run the code in the wokwi.
You will see a /* block */ of seemingly innocuous code in one of the cases, the uncommenting of which will result in the case label (2, or want1) no longer being flagged as a duplicate.
Then you will please explain that. 
Here it is in the wokwi, that is the quickest way to see the problem
and here is the code, a certainly hacked up hack of the original. Just in case you still don't want to click away to the wokwi. I did test this with "verify" in the IDE v. 1.8.7. Same same.
#include <Servo.h>
typedef enum {NoNewCard = 0, NoData, Match, NoMatch} RFIDState;
RFIDState rfidCheck()
{
unsigned char fake = random(4);
switch (fake) {
case 0 :
Serial.println("RFID check <NoNewCard>");
return NoNewCard;
case 1 :
Serial.println("RFID check <NoData>");
return NoData;
case 3 :
Serial.println("RFID check <Match>");
return Match;
case 2 :
Serial.println("RFID check <NoMatch>");
return NoMatch;
}
return fake;
}
Servo fingers;
Servo thumb;
Servo wrist;
int angle=0;
typedef enum
{
initialState = 0,
wantCheckrfid = 1,
want1 = 2, //Fistclench,
wantFistrelax = 3,
want2 = 4, //Thumbsupclench,
wantThumbsuprelax = 5,
} states;
// state machine variables
states state = initialState;
unsigned long lastStateChange = 0;
unsigned long timeInThisState = 1000;
void setup() {
Serial.begin(115200);
Serial.println("stripped of everything! zeroing servos");
fingers.attach(4);
thumb.attach(3);
wrist.attach(2);
fingers.write(0);
thumb.write(0);
wrist.write(0);
delay(777);
//wrist2.attach(10)
//pinktip.attach(9);
//pinkybase.attach(8);
//ringtip.attach(7);
//ringbase.attach(6);
//middletip.attach(5);
//middlebase.attach(4);
//indextip.attach(3);
//indexbase.attach(2);
}
void doStateChange ()
{
lastStateChange = millis ();
timeInThisState = 1000;
Serial.print(" doStateChange state ");
Serial.println(state);
switch (state)
{
case 2: // duplicate of want1
case initialState:
state = wantCheckrfid;
break;
case wantCheckrfid:
// if I uncomment the section below, case 2 above is no longer an error
/* RFIDState rfidNow = rfidCheck();
// if (rfidNow == NoNewCard) return;
// if (rfidNow == NoData) return;
if (rfidNow == Match) {
Serial.print("wantCheckrfid: fingers "); Serial.print(20);
Serial.print(" thumb "); Serial.println(30);
fingers.write(20);
thumb.write(30);
delay (500);
Serial.print(" and fingers "); Serial.print(0);
Serial.print(" thumb "); Serial.println(0);
fingers.write(0);
thumb.write(0);
}
*/
// rfidNow is NoMatch or fell through from Match
state = random(2)? want1 : want2;
timeInThisState = random (1000)+ 2000;
Serial.print(" state "); Serial.println(state);
Serial.print(" for time ");Serial.println(timeInThisState);
break;
case want1:
Serial.print("want1: fingers "); Serial.print(120);
Serial.print(" thumb "); Serial.println(80);
fingers.write(120);
thumb.write(80);
state = wantFistrelax;
timeInThisState = 2000;
break;
case wantFistrelax:
Serial.print("wantFistrelax: fingers "); Serial.print(0);
Serial.print(" thumb "); Serial.println(0);
fingers.write(0);
thumb.write(0);
state = wantCheckrfid;
timeInThisState = 3000;
break;
case want2:
Serial.print("want2: fingers "); Serial.print(120);
Serial.print(" wrist "); Serial.println(90);
fingers.write(120);
wrist.write(90);
state = wantThumbsuprelax;
timeInThisState = 2000;
break;
case wantThumbsuprelax:
Serial.print("wantThumbsuprelax: fingers "); Serial.print(0);
Serial.print(" wrist "); Serial.println(0);
fingers.write(0);
wrist.write(0);
state = wantCheckrfid;
timeInThisState = 3000;
break;
}
}
void loop() {
if (millis () - lastStateChange >= timeInThisState)
doStateChange ();
}
I do so hope that I will have wasted your time because of something dumb I am missing.
a7
