GAP central and GATT server

RE: GAP central and GATT server

Petter Myhre — Thu, 16 Apr 2015 14:44:07 GMT

I would use ble_app_hrs_c project as a starting point, or maybe ble_app_uart_c. ble_app_uart_c uses a 128-bit vendor specific UUID, which I guess also the crtp service does.

RE: GAP central and GATT server

spike — Tue, 14 Apr 2015 15:09:43 GMT

Thanks for reply and question. It seems my previous understanding is wrong. The Crazyflies is running GATT server. Please find Crazyflie's firmware of 51822 in github.com/.../crazyflie2-nrf-firmware By. In the file ble_crazyflies.c, they claim the GATT services as below:

sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &service_uuid, &service_handle); err = sd_ble_gatts_characteristic_add(service_handle, &crtp_md, &crtp_attr, &crtp_handle);

Actually for my need, I just want to send control command to the Crazyflies via it's CRTP service. In this case, I should use GATT client in my side. And I can take ble_ias_c.c as example, am I right? Thanks! Spike

RE: GAP central and GATT server

Petter Myhre — Tue, 14 Apr 2015 12:38:34 GMT

Are you sure the Crazyflie is running a GATT client? What services/characteristics is it looking for on the GATT server? Do you have a spec or something you could share? I tried to have a look at your code, but it is difficult without your complete project.

RE: GAP central and GATT server

Petter Myhre — Tue, 14 Apr 2015 12:35:20 GMT

We don't have an example implementing a GAP central and GATT server in our SDK.