Hey all,
Custom service, but my first where I am looking for more than one byte of data written to a characteristic at a time - in this case 8 bytes. So everything looks good - I see the service and characteristics fine, I can write to the characteristic, but if I use nRF Connect to write anything other than a byte (or BYTE in the app) I get no response at all. If I write a single BYTE I see it come over and my observer catches it, but nothing for BYTE ARRAY or for UINT32_T, for example. Have I set something up incorrectly? Or maybe I'm using nRF Connect wrong?
I see this in ble_gatts.h:
uint8_t data[1]; /**< Received data. @note This is a variable length array. The size of 1 indicated is only a placeholder for compilation.
See @ref sd_ble_evt_get for more information on how to use event structures with variable length array members. */
and I assume that data can be 8 bytes long since it says data is variable length, but maybe that is incorrect?
Here's the code that should get hit (and is hit when I write one byte to the characteristic):
void ble_serv_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
{
ble_serv_t * p_serv = (ble_serv_t *)p_context;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
p_serv->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
break;
case BLE_GATTS_EVT_WRITE:
{
ble_gatts_evt_write_t const * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
if ( (p_evt_write->handle == p_serv->serv_handles.value_handle)
&& (p_evt_write->len == SERV_DATA_LENGTH) // == 8
&& (p_serv->evt_handler != NULL))
{
p_serv->evt_handler(p_ble_evt->evt.gap_evt.conn_handle, p_serv, p_evt_write); // datetime is in p_evt_write->data
}
}
break;
case BLE_GAP_EVT_DISCONNECTED:
p_serv->conn_handle = BLE_CONN_HANDLE_INVALID;
break;
default:
break;
}
}
