https://devzone.nordicsemi.com/f/nordic-q-a/80222/ble-composite-hid-deviceI am trying to develop a peripheral targeted for mobile devices that can either behave as a touchscreen (several simultaneous contact points, useful for performing gestures, and no visible pointer) or a regular mouse (pointer showing) depending on certainen-USTelligent Community 13Tue, 05 Oct 2021 15:08:20 GMThttps://devzone.nordicsemi.com/thread/332683?ContentTypeID=1Tue, 05 Oct 2021 15:08:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3af3d7dd-89ef-4d77-ac6a-fb7a2a07af70Sigurd<p>Hi,</p> [quote user=""]I tried creating a composite device by using independent BLE_HID instances for the mouse and touchscreen but only the first created instance works[/quote] <p>We don&#39;t have any BLE HID composite examples in the nRF5 SDK, but the&nbsp;<a href="https://www.nordicsemi.com/Products/Reference-designs/nRFready-Smart-Remote-3-for-nRF52-Series/Download?lang=en#infotabs">Smart Remote 3 reference design</a> <span>has one HoG(HID over GATT) Service used for audio, touchpad, keyboard, and gyro operations. It might be useful to take a look at that. The HID descriptor, also referred to as Report Map, that it uses is detailed below:</span></p> <p><span><pre class="ui-code" data-mode="text">#if CONFIG_AUDIO_ENABLED &amp;&amp; CONFIG_AUDIO_HID_ENABLED /* Audio */ 0x06, 0x00, 0xFF, // Usage Page (Vendor Defined Page 1) 0x09, AUDIO_CONFIG_ID, // Usage (Vendor Usage) 0xA1, 0x01, // Collection (Application) 0x85, AUDIO_IN_REP_ID, // Report ID (AUDIO_IN_REP_ID) 0x15, 0x00, // Logical Minimum (0) 0x25, 0xFF, // Logical Maximum (255) 0x75, AUDIO_IN_REP_SIZE, // Report Size (AUDIO_IN_REP_SIZE) 0x95, AUDIO_IN_REP_COUNT, // Report Count (AUDIO_IN_REP_COUNT) 0x09, 0x00, // Usage (Vendor Usage 1) 0x81, 0x02, // Input (Data, Var, Abs) #if (AUDIO_IN_REP_ID != AUDIO_OUT_REP_ID) 0x85, AUDIO_OUT_REP_ID, // Report ID (AUDIO_OUT_REP_ID) #endif 0x95, AUDIO_OUT_REP_COUNT, // Report Count (AUDIO_OUT_REP_COUNT) 0x75, AUDIO_OUT_REP_SIZE, // Report Size (AUDIO_OUT_REP_SIZE) 0x09, 0x00, // Usage (Vendor Usage 1) 0x91, 0x02, // Output (Data, Var, Abs) 0xC0, // End Collection #endif /* CONFIG_AUDIO_ENABLED &amp;&amp; CONFIG_AUDIO_HID_ENABLED */ /* Keyboard */ 0x05, 0x01, // Usage Page (Generic Desktop) 0x09, 0x06, // Usage (Keyboard) 0xA1, 0x01, // Collection (Application) 0x85, KEYBOARD_IN_REP_ID, // Report ID (KEYBOARD_IN_REP_ID) 0x75, KEYBOARD_IN_REP_SIZE, // Report Size (KEYBOARD_IN_REP_SIZE) 0x95, KEYBOARD_IN_REP_COUNT, // Report Count (KEYBOARD_IN_REP_COUNT) 0x15, 0x00, // Logical Minimum (0) 0x25, 0xFF, // Logical Maximum (255) 0x05, 0x07, // Usage Page (Keyboard) 0x19, 0x00, // Usage Minimum (0) 0x29, 0xFF, // Usage Maximum (255) 0x81, 0x00, // Input (Data, Ary, Abs) 0xC0, // End Collection /* Consumer Control */ 0x05, 0x0C, // Usage Page (Consumer Devices) 0x09, 0x01, // Usage (Consumer Control) 0xA1, 0x01, // Collection (Application) 0x85, CONSUMER_CTRL_IN_REP_ID, // Report ID (CONSUMER_CTRL_IN_REP_ID) 0x75, CONSUMER_CTRL_IN_REP_SIZE,// Report Size (CONSUMER_CTRL_IN_REP_SIZE) 0x95, CONSUMER_CTRL_IN_REP_COUNT,// Report Count (CONSUMER_CTRL_IN_REP_COUNT) 0x15, 0x00, // Logical Minimum (0) 0x26, 0xFF, 0x07, // Logical Maximum (2047) 0x19, 0x00, // Usage Minimum (0) 0x2A, 0xFF, 0x07, // Usage Maximum (2047) 0x81, 0x00, // Input (Data, Ary, Abs) 0xC0, // End Collection /* Mouse */ 0x05, 0x01, // Usage Page (Generic Desktop) 0x09, 0x02, // Usage (Mouse) 0xA1, 0x01, // Collection (Application) 0x09, 0x01, // Usage (Pointer) 0xA1, 0x00, // Collection (Physical) 0x85, MOUSE_BTN_IN_REP_ID, // Report ID (MOUSE_BTN_IN_REP_ID) 0x75, MOUSE_BTN_IN_REP_SIZE, // Report Size (MOUSE_BTN_IN_REP_SIZE) 0x95, MOUSE_BTN_IN_REP_COUNT, // Report Count (MOUSE_BTN_IN_REP_COUNT) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x05, 0x09, // Usage Page (Button) 0x19, 0x01, // Usage Minimum (Button 1) 0x29, 0x08, // Usage Maximum (Button 8) 0x81, 0x02, // Input (Data, Var, Abs) 0xC0, // End Collection 0xA1, 0x00, // Collection (Physical) 0x85, MOUSE_XY_IN_REP_ID, // Report ID (MOUSE_XY_IN_REP_ID) 0x75, MOUSE_XY_IN_REP_SIZE, // Report Size (MOUSE_XY_IN_REP_SIZE) 0x95, MOUSE_XY_IN_REP_COUNT, // Report Count (MOUSE_XY_IN_REP_COUNT) 0x16, 0x01, 0xF8, // Logical Minimum (-2047) 0x26, 0xFF, 0x07, // Logical Maximum (2047) 0x05, 0x01, // Usage Page (Generic Desktop) 0x09, 0x30, // Usage (X) 0x09, 0x31, // Usage (Y) 0x81, 0x06, // Input (Data, Var, Rel) 0xC0, // End Collection 0xA1, 0x00, // Collection (Physical) 0x85, MOUSE_WP_IN_REP_ID, // Report ID (MOUSE_WP_IN_REP_ID) 0x75, MOUSE_WP_IN_REP_SIZE, // Report Size (MOUSE_WP_IN_REP_SIZE) 0x95, 0x01, // Report Count (1) 0x15, 0x81, // Logical Minimum (-127) 0x25, 0x7F, // Logical Maximum (127) 0x05, 0x01, // Usage Page (Generic Desktop) 0x09, 0x38, // Usage (Wheel) 0x81, 0x06, // Input (Data, Var, Rel) 0x75, MOUSE_WP_IN_REP_SIZE, // Report Size (MOUSE_WP_IN_REP_SIZE) 0x95, 0x01, // Report Count (1) 0x15, 0x81, // Logical Minimum (-127) 0x25, 0x7F, // Logical Maximum (127) 0x05, 0x0C, // Usage Page (Consumer Devices) 0x0A, 0x38, 0x02, // Usage (AC Pan) 0x81, 0x06, // Input (Data, Var, Rel) 0xC0, // End Collection 0xC0, // End Collection </pre></span></p> <p><span></span></p> [quote user=""]When bonding with the host, I get a BLE_ERROR_GATTS_SYS_ATTR_MISSING[/quote] <p>Normally the Peer Manager should handle this for you. Maybe delay sending data until you get e.g. the first&nbsp;PM_EVT_LOCAL_DB_CACHE_APPLIED event, see this post:&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/61014/getting-a-0x3401-ble_error_gatts_sys_attr_missing-from-sd_ble_gatts_hvx">https://devzone.nordicsemi.com/f/nordic-q-a/61014/getting-a-0x3401-ble_error_gatts_sys_attr_missing-from-sd_ble_gatts_hvx</a></p><div style="clear:both;"></div>