Which event should be triggered by a "write" operation?

RE: Which event should be triggered by a "write" operation?

Petter Myhre — Thu, 26 May 2016 12:17:15 GMT

The server has the data, the client accesses this data. The client can write data to the server, or read data from the server.

RE: Which event should be triggered by a "write" operation?

Revo — Thu, 26 May 2016 08:29:45 GMT

It seems to work fine, thanks! But i would like to have a clarification, the sever should be the one sending data and the client the one receiving data, correct? So why is the server in this case the one who performs the write, since it is SENDING some data, and the other device is receiving it? Aren't the role swapped?

RE: Which event should be triggered by a "write" operation?

Revo — Wed, 25 May 2016 14:33:24 GMT

thanks, i will try tomorrow and report back!

RE: Which event should be triggered by a "write" operation?

Petter Myhre — Wed, 25 May 2016 13:58:20 GMT

It should be something like p_ble_evt->evt.gatts_evt.params.write.data[x]

RE: Which event should be triggered by a "write" operation?

Revo — Wed, 25 May 2016 13:09:26 GMT

Ok sorry, i wrongly called the server client. I think the problem is the values that i am passing to the case BLE_GATTS_EVT_WRITE, because now i managed to make it enter there when the other device performs a write, but it doesn't do what i want! I posted the code of my service; as you can see, in ble_our_service_on_ble_evt i put the case BLE_GATTS_EVT_WRITE, stating that if a particular byte of the considered characteristic value is not zero, it should toggle a led (of course this doesn't happen). The problem is that, in my opinion, i don't pass the value correctly to the if statement. Can you suggest me ho, syntactically speaking, i refer to the characteristic value in that case?

RE: Which event should be triggered by a "write" operation?

Petter Myhre — Wed, 25 May 2016 12:31:15 GMT

A client doesn't receive write commands, it sends them. A server receives write commands.

If a client sends a write command to a server you will receive the BLE_GATTS_EVT_WRITE event. Receiving this shouldn't cause a disconnection.