August 2017
Intermediate to advanced
278 pages
6h 1m
English
Content preview from IoT Projects with Bluetooth Low Energy
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Indications and Notifications
We briefly touched upon indications and notifications in the previous section. Indications and notifications basically are server (GATT) side updates to a client. A client has to configure Indications and Notifications for a characteristic's value through its client characteristic configuration descriptor to get notified every time a characteristic's value gets updated on the server:
Figure 15: Indications versus notifications
As shown in the preceding figure:
- Indications: They need to be acknowledged by the client. The server does not send the next indication until it gets the acknowledgement back from the client. ...