RE: What is the point of connection handles?

Simon — Fri, 28 Dec 2018 14:51:32 GMT

[quote user=""]A peripheral stops advertising upon connection, so it can never have more than one connection, right? [/quote]

This is not correct, a peripheral can maintain up to 20 link simultaneously. Take a look at the BLE Multiperipheral Application example, which shows how a peripheral can connect to 4 centrals. This application uses the Connection state Library to keep track of the states for the differenc connections. It is also possible to use the BLE Link Context Manager on top of that library, and enables you to associate link-related data to a given connection handle. All in all, connection handles are quite useful, since you can keep control and differentiate between the connections.

[quote user=""]When is the connection handle NOT zero?[/quote]

The connection handle is not zero if it is initalized but not associated with a connected device, then it is assigned the value 0xFFFF. Otherwise, if you are working with a multilink application, for example the BLE Multiperipheral Application, all the connection handles except for the first will have a non-zero value. E.g. if you are connected to four different central devices, their connection handles will be assigned the values 0x0, 0x1, 0x2 and 0x3 respectively.

Best regards,

Simon

RE: What is the point of connection handles?

Simon — Fri, 28 Dec 2018 10:58:31 GMT

Currently, a huge portion of the support team are on christmas vacation, and we might not be able to answer you in the closest future. In the first week of 2019 most of the staff will we back and you can expect an answer then.

Best regards,

Simon