warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]

[Silverridge]

Hi everyone,

I'm an beginner with esp32s so please bare with me.
I am getting this error message:

Code: Select all

In file included from C:\Temp\flora2\flora2.ino:38:
C:\Temp\flora2\config.h:9:1: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]

when uploading the code from this site: https://github.com/RonnyWinkler/esp32.miflora
The altered config.h looks like this in the beginning (the first 9 lines):

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// array of different xiaomi flora MAC addresses
char* FLORA_DEVICES[] = {
    "C4:7C:8D:6D:EE:BA", 
    "C4:7C:8D:6E:1D:27",
    "C4:7C:8D:6E:02:A9",
    "C4:7C:8D:6E:01:09",    
    "C4:7C:8D:6E:1D:8A"
};

I am using these ESP's: https://www.amazon.de/gp/product/B09PLC ... =UTF8&th=1 (NodeMCU ESP32 S)

What am I missing or doing wrong?