options for NRF.setAdvertising?

Hello ,
I have read the Reference for the NRF.setAdvertising , and something is missing for me.
For example

to return battery level at 95%, do:
NRF.setAdvertising({
  0x180F : [95]
});
Or you could report the current temperature:
setInterval(function() {
  NRF.setAdvertising({
    0x1809 : [Math.round(E.getTemperature())]
  });
}, 30000);

but how do I get this data ?
also where is the lines I can edit ? which options I can use\edit?

is there a list of thing I can use?

also
when I scan my device I can see that the MAC is

16:17:18:20:ac:a0 random

why is it?
what is the different between
Public,statis,random?
what do I need to use?

Thanks,

but how do I get this data ?

What data? The number like 0x180f? Check out the link to the Bluetooth SIG in http://www.espruino.com/About+Bluetooth+LE#uuids

why is it? can I change the MAC of the device ?

Each device has its own MAC address - that's how it works, like Ethernet/WiFi/etc.

You can change it with NRF.setAddress but it's not recommended.

let me explain myself:

1. 0x180f - where this came from ? in the link you sent there is no refernce to this
   is this something unique to espruino? or it's a known bluethooth information?

2. I want to be able to scan and advertise my device at the same time .
   so if I'm correct I need to use 2 devices , one for scanning all the time , and 1 sending my data
   is it true?
   or I can use only 1 and do some manipulation in the timing?
   I don't need that someone will connect me - just to show I'm alive .
   I have try to use this function:

   NRF.setAdvertising({},{name:"test1",connectable:"false",scannable :"false",interval:1000});
   

but I;m steel able to connect to "test1" - why?

3 . I want to change my own MAC for testing issue , so I will know which MAC I'm testing,
more easy for me - this is the reason.

0x180f

Fourth line down on https://www.bluetooth.com/specifications/gatt/services/

want to be able to scan and advertise my device at the same time .

That's fine, it happens automatically. This post from a few days ago is just what you need: http://forum.espruino.com/conversations/346289/#comment15233728

I have try to use this function but I;m steel able to connect to

Are you sure it's actually executing? That should definitely stop connecting. You could also see http://www.espruino.com/BLE+Security

1. great , this is what I looked for .
   so for example : when I connect my "tws i7" to my phone I see the battery is 80% .
   so they are sending the 0x180F ?

2. I will do as it say in the post you sent me , and see everything is OK .

Thanks ,

so they are sending the 0x180F ?

Probably, yes

Thanks ,