When is the "cancelled" occur?

[Phan_hai_hust]

Hello Nordic, I'm reading: creating new modes in sdk documentation. In the simple_on_off client model, I do not understand the place I underlined in the picture. When is the "cancelled" occur? As far as I understand, there are only two scenarios: if successful, it will receive a "success" message, and if the server fails to respond, it will be reported as "timeout".

[Jared]

Hi

As the name suggests, the third scenario cancelled happens when the operation is explicitly terminated while it's in progress. While in the timeout scenario it tries to execute the the transaction multiple times within the time limit but fails. 

Jared 

[Phan_hai_hust]

Thank you. Which cases lead to "cancelled"?

[Jared]

Hi

"Canceled" occurs when the message is canceled with the functions access_model_reliable_cancel() or  access_reliable_cancel_all.  

Documentation on infocenter: http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.meshsdk.v2.2.0%2Fgroup__ACCESS__RELIABLE.html&cp=4_1_0_6_4_0_3_6&anchor=ga134c48b687e70385b9f9f0f7d5210df8

Best regards

Jared 

[Phan_hai_hust]

i got it. thank you