How to convert String to Characters and/or array within a function

[star297]

There's probably answer somewhere on the forum, but couldn't see it.
I don't use strings normally but appears to be popular on Arduino??

I'm using an ESP32 firebase library where I need to read back a data string (or character array).
This will normally be over 12 characters.

this is the function I'm using:

if (Firebase.get(firebaseData, "/Project/datastring"))
  {
    mydata = (firebaseData.stringData());    
  }

I want to use a container something like:

char* mydata;
char mydata[64];

I can do this with string to floats:

if (Firebase.get(firebaseData, "/Project/myfloat"))
  {
   myfloat = (firebaseData.stringData().toFloat());
  }

I have been doing this:

display.printf("mystring: %s\n", mystring.c_str());

to display the data, but I need to put this in a container.

Is there a more simple preferred way?

Thank you

[J-M-L]

what's the type of whatever is returned by Firebase.get()? which library are you using?

[blh64]

if you want a copy of what comes back:

char mydata[64];
if (Firebase.get(firebaseData, "/Project/datastring"))
  {
    strcpy(mydata,firebaseData.stringData().c_str());
  }

[star297]

blh64:
if you want a copy of what comes back:

char mydata[64];

if (Firebase.get(firebaseData, "/Project/datastring"))
 {
   strcpy(mydata,firebaseData.stringData().c_str());
 }

Thankyou @blh64 that works just fine.

J-M-L:
what's the type of whatever is returned by Firebase.get()? which library are you using?

Sorry @J-M-L, I should have mentioned it's this one:

GitHub - mobizt/Firebase-ESP32: 🔥 Firebase RTDB Arduino Library for ESP32....

The data type stored on Firebase is a string (generated from a json array).
I use standard GET function and sort the data when it comes in.
However this is the first time I've used Arduino, generally I use Mbed but can't program on there as the ESP32 is not an ARM core.