Help with preferences

[sansillusion]

Hardware:

Board: NodeMCU-32S
Core Installation/update date: today
IDE name: Arduino IDE
Flash Frequency: 40Mhz
Upload Speed: 115200

Description:

I would like to store Dallas temperature devices address in preferences (so I can manipulate them in web app)

DeviceAddress Probe01 = { 0x28, 0xFF, 0xF0, 0x73, 0x01, 0x17, 0x04, 0x86 }; 
DeviceAddress Probe02 = { 0x28, 0xFF, 0x58, 0x54, 0x01, 0x17, 0x04, 0x7D };
DeviceAddress Probe03 = { 0x28, 0xFF, 0x3A, 0x36, 0x01, 0x17, 0x05, 0x26 };
DeviceAddress Probe04 = { 0x28, 0xFF, 0x2E, 0x34, 0x01, 0x17, 0x05, 0x42 };
DeviceAddress Probe05 = { 0x28, 0xFF, 0xC9, 0x79, 0x01, 0x17, 0x04, 0xEA };
DeviceAddress Probe06 = { 0x28, 0xFF, 0xF5, 0x2F, 0x01, 0x17, 0x05, 0xC0 };

I I try to use a String like so :

String str = "0x28, 0xFF, 0xF0, 0x73, 0x01, 0x17, 0x04, 0x86";
DeviceAddress Probe01 = { str }; 

I get "Cannot convert 'String' to 'uint8_t {aka unsigned char}' in initialization"
I am verry confused with all the variable types in C. What variable type should I use and I need it to be compatible with "Preferences.h" like :

int ahi = preferences.getInt("add1", "0x28, 0xFF, 0xF0, 0x73, 0x01, 0x17, 0x04, 0x86");

???
I am lost in all those variables types and the different way to use them any help would be welcome.

[tetious]

Looks like DeviceAddress is just an 8 byte array:

typedef uint8_t DeviceAddress[8];

Therefore you'll want to use putBytes and getBytes like this:

// to save
preferences.putBytes("Probe01", &Probe01, 8);

// to load
DeviceAddress Probe01; // declare the array first!
preferences.getBytes("Probe01", &Probe01, 8);

[sansillusion]

I went another way and instead of using/storing addresses I used the sensors.getAddress() method
sensors.getAddress(Probe0, 0);
that lets me use a simple int value.
Working on it here : https://github.com/sansillusion/esp32GrowSystem

But thanks a lot for your help, I was almost there with my tests I was missing the 8 in :
preferences.getBytes("Probe01", &Probe01, 8);