Read Data from Table

[Alphaplasti]

Hi everyone, I follow this forum since many month and it helps me every time, but today I've a problem and i dont find a similar post in this forum :

I want to check a nest smoke detector. Okay for communication, but the answer is :

* table:
[smoke_co_alarms]
 * table:
  [sgUHZf.....APJP7e2-z........Y]
   * table:
    [last_manual_test_time]
     * string: 2017-11-24T19:47:51.000Z
    [co_alarm_state]
     * string: ok
    [ui_color_state]
     * string: green
    [is_manual_test_active]
     * bool: false
    [where_id]
     * string: gBtrRP2jzy1uqWVr.....s8yYloagGi61-wviuEzKpbe...JsA
    [structure_id]
     * string: OA-re4bF-UhfZGCAXXn6......4cMtcYTovEXfZGlY_BMyoipn6UA
    [device_id]
     * string: sgUHZf.....APJP7e2-z........Y
    [battery_health]
     * string: ok
    [smoke_alarm_state]
     * string: ok
    [is_online]
     * bool: true
    [software_version]
     * string: 3.1.3rc2
    [name_long]
     * string: Bedroom Nest Protect
    [last_connection]
     * string: 2017-11-27T14:02:52.906Z
    [locale]
     * string: fr-FR
    [name]
     * string: Bedroom
    [where_name]
     * string: Bedroom

But I don't know how to extract data to a group object (I think is very easy for you but my knowledge in Lua Langage is very low )
For example I want to read the data [co_alarm_state], and I'm forced to use this table, because nest product don't allow more of two http request/minute so I can't just ask direct http request.

Thanks for your help !

Adrien

Ps : I have a Schneider Spacelynk 2.0.1