client to server data transfer with ble_app_hrs

RE: client to server data transfer with ble_app_hrs

Jo-Jo — Fri, 25 Jul 2014 21:03:28 GMT

Even if I comment out the the cccd_configure() call, the values are still updated on the client, so I don't think this call is doing what you said it is doing unless it is redundant. can you provide an example of how to use sd_ble_gattc_write() to update a global variable on the server? Nordic doesn't provide an example, and I am beginning to think that this behavior is not support with the current soft devices, which would mean I cannot use Nordic devices in our project. Unfortunately, I have been unable to get any sort of response from Nordic's support department, which doesn't make me feel comfortable going forward with any Nordic devices.

RE: client to server data transfer with ble_app_hrs

Jo-Jo — Thu, 24 Jul 2014 17:44:56 GMT

I can't figure out where on the server this message is received and handled. What and where is the variable that is being written?

RE: client to server data transfer with ble_app_hrs

Hung Bui — Thu, 24 Jul 2014 14:11:30 GMT

Hi Jo-Jo,

You would need to have a characteristic on the server (peripheral) that has write property. And on the client (central) you would need to do a write to that characteristic to send data.

In ble_app_hrs_c example, we write to the CCCD characteristic on the server value "1" to enable notification. Please have a look at the BLE_BAS_C_EVT_DISCOVERY_COMPLETE event, and trace down to the cccd_configure() function in ble_hrs_c.c You can follow that to write your own write command.