central , server master vs peripheral, client, slave

[ToTo]

Hi When using BLE events i'm usually confused which event to handle , for example GATTS_WRITE or GATTC_WRITE.. i don't know which is the server and the client ?

Any idea to differenciate between them ? I tested some apps and i read some documents ,, i arrived to this conclusion : MASTER=Server= Central Slave=Client=peripheral Is that True ?

[Punit]

Your Mobile is generally a GAP Central & your device[say smart sensor] is the GAP Peripheral at the time of establishing connection[adversitement].

Once the connection is established, we denote them by GATT Client & GATT Server respectively.

Master & Slave is just another way of saying the same.

The client always asks for info from the server.

I hope this helps...

[Punit]

Within a server, you can implement Read & Write characteristics, i.e your client can send data to a write characteristic & read data from a read characteristic.

For example,in case of a heart rate service, you can read the heart beat value, but cannot write on it. Also, there are various ways with which characteristics can be read or written into..