Hello Arduino Stack Exchange,
I have an an enum instance called state:
enum States
{
SLEEP,
AWAKE,
CRAZY
} state;
States state = SLEEP;
I would like to convert the value of state to a String so I can serially print it using Serial.println().
Currently, when I type String(state), I get a value 0, 1, etc. I suppose this corresponds with the index of the enum's key.
How can I get it to return "SLEEP", "AWAKE", etc.?
You can print the value as it is:
Serial.println(state);
This will print the the ordering number of the enum, but you can specify the value as any number or char.
enum States
{
SLEEP = 'S',
AWAKE = 'A',
CRAZY = 'C'
};
Now if you print it with cast to char Serial.println((char) state); it will print a character, which in my opinion is much better then some number.
If you want to convert the enum values identifiers to strings you can do it with a preprocessor macro.
enum States
{
SLEEP,
AWAKE,
CRAZY
} state;
#define IDNAME(name) #name
const char* stateNames[] = {IDNAME(SLEEP), IDNAME(AWAKE), IDNAME(CRAZY)};
I don't think this is better then to print the char values. To do a pretty print it is better to use descriptions.
const char* stateStr[] = {"Sleep", "Awake", "Undefined"};
Serial.println(stateStr[state]);
#name wasn't a comment. I used the preprocessor macro method, thank you!
arraysis a hint towards the solutionStates state = IDLE;will not compile :)enumcases,IDLEwas one of them. I updated the question to remove it