L2CAP Examples

[Charles Horkin]

Hello,

Is there anyone who has any example code for using L2CAP transfers instead of services? Something where the use of sd_ble_l2cap_tx() and the rx callback are used?

Alternatively, is there a way to send large data structures using the BLE? I want to send a packet containing a large amount of values (some are arrays). I'm not quite sure that attributes are the best way to go about this.

Perhaps RPC would be a good approach?

I'm using the PCA10001 demo board with the NRF51822 uC.

[Ole Morten]

There isn't really much magic to using the L2CAP API, but remember that you're still limited to the max MTU size of 23. In addition, most Central side APIs (except the S120) doesn't expose any L2CAP APIs, and hence it isn't really usable for most applications.

To transfer large data, I'd therefore recommend taking a look at this question, which explains our recommended approach. You may also have use in taking a look at this example application, as well as this question that covers throughput calculation.