Jawbone connection

I am not sure if this is the best place to post this request, but Moderator fell free to move it.

I got a Jawbone UP 24 and I am trying to connect it with my PC that runs Linux. So far I managed to connect with GATTTOOL and get some stuff working.

I had to “get” some information from the UP application:

The app looks for this service: 0x0012 uuid: f7c9ba7e-6658-4390-b53c-1de5e1453654

then is setting “ENABLE_NOTIFICATION_VALUE” ( I guess active the sensors, based on the SensorTag information ) these characteristics:

handle: 0x000a, char properties: 0x18, char value handle: 0x000b,

uuid: f7c9b162-6658-4390-b53c-1de5e1453654

handle: 0x000d, char properties: 0x10, char value handle: 0x000e,

uuid: f7c9ba82-6658-4390-b53c-1de5e1453654

handle: 0x0010, char properties: 0x10, char value handle: 0x0011,

uuid: f7c9ba91-6658-4390-b53c-1de5e1453654

But with GATTTOOL I only get Characteristic Write Request failed: Attribute can’t be written

I would like to “crack it” so I can read the value from my pc and later with Arduino or something else.

I will be happy if someone can help me out