Read the characteristic value

[nejcokle]

Hey,

I want to read the value of characteristic of conneceted peripheral. I'm using two BLE modules, one is peripheral and one is central. I connected with central to peripheral, and now i need to know how to read characteristic value from it. I explored sd_ble_gattc_char_value_by_uuid_read and sd_ble_gattc_read functions, but i can't seem to get them to work poperly.

Can someone please explain to me how to properly set them up? I looked over the examples but i'm still having some problems.

[Inspectron]

Do you want to read the characteristic from central to peripheral or from peripheral to central?

[nejcokle]

I want to read data from my peripheral module with my central module.

[Inspectron]

Look at this example BLE-APP-LBS. In this example they read the state of the Button state.

[nejcokle]

I managed to get sd_ble_gattc_char_value_by_uuid_read function to work, but where can i see the value? the function returns NRF_SUCCESS, but i don't know how to implement it to see real value.

[Petter Myhre]

Please have a look at this MSC

You will get a BLE_GATTC_EVT_CHAR_VAL_BY_UUID_READ_RSP event(p_ble_evt->header.evt_id) in the ble_evt_dispatch().

Then you can get the value from p_ble_evt->gattc_evt.params.char_val_by_uuid_read_rsp...