bt_gatt_service_register not working

Question

I tested out bt_gatt_service_register using the samples/bluetooth/peripheral sample by adding 
 
 CONFIG_BT_GATT_DYNAMIC_DB =y 
 
 to the proj.conf and the following to the start of main:

static struct bt_uuid_128 uuid ; 
 uuid = ( struct bt_uuid_128 ) BT_UUID_INIT_128 ( 0x53 , 0xF5 , 0x3C , 0x12 , 0xF0 , 0xD6 , 0x25 , 0xAD , 0xD6 , 0x4E , 0xA6 , 0x48 , 0x01 , 0x00 , 0x54 , 0xE7 ); 
 static struct bt_gatt_attr attr ; 
 attr = ( struct bt_gatt_attr ) BT_GATT_PRIMARY_SERVICE ( & uuid ); 
 static struct bt_gatt_service service ; 
 service = ( struct bt_gatt_service ) { . attrs = & attr , . attr_count = 1 }; 
 int result = bt_gatt_service_register ( & service ); 
 if ( result != 0 ) { 
 printk ( "Bluetooth dynamic service registration failed (result %d ) 
 " , result ); 
 return 0 ; 
 } 
 
 This works and I can see the service on an iOS device. 
 
 However, if I do the same with my own products application then the service can NOT be seen on an iOS device. The bt_gatt_service_register does return success. I can see changes to statically defined services. 
 
 I have copied all my proj.conf options into the samples/bluetooth/peripheral sample to see if maybe one the settings was causing the issue, but it still works. 
 
 Anyone else run into this? Or have any ideas for how to debug and figure out why the bt_gatt_service_register service does not seem to be working in my application?

denis · Accepted Answer

This is an example of what is working for me:

Fullscreen 
 8561.example.c 
 Download 
 
 typedef struct {
 struct bt_gatt_attr attrs[6];
 struct bt_gatt_service service;
} pt_ble_nus_t;

pt_ble_nus_t pt_ble_nus;

void pt_ble_nus_tx_ccc_cfg_changed(const struct bt_gatt_attr *attr fd_unused, uint16_t value) { 
 bool notify = (value == BT_GATT_CCC_NOTIFY);
 ...
}

ssize_t pt_ble_nus_rx_write(
 struct bt_conn *conn fd_unused, const struct bt_gatt_attr *attr fd_unused, const void *data, uint16_t length, uint16_t offset fd_unused, uint8_t flags fd_unused
) {
 ...
 return length;
}

void pt_ble_nus_attr_tx(void) {
 static struct bt_uuid_128 uuid = {
 .uuid = { BT_UUID_TYPE_128 },
 .val = { PT_BLE_NUS_UUID_TX_VAL },
 };
 static struct bt_uuid_16 gatt_chrc_uuid = { .uuid = { BT_UUID_TYPE_16 }, .val = BT_UUID_GATT_CHRC_VAL };
 static struct bt_gatt_chrc chrc_user_data = {
 .uuid = (struct bt_uuid *)&uuid,
 .value_handle = 0U,
 .properties = BT_GATT_CHRC_NOTIFY,
 };
 pt_ble_nus.attrs[1] = (struct bt_gatt_attr) {
 .uuid = (struct bt_uuid *)&gatt_chrc_uuid,
 .read = bt_gatt_attr_read_chrc,
 .write = (void *)0,
 .user_data = (void *)&chrc_user_data,
 .handle = 0,
 .perm = BT_GATT_PERM_READ,
 };

pt_ble_nus.attrs[2] = (struct bt_gatt_attr) {
 .uuid = (struct bt_uuid *)&uuid,
 .read = (void *)0,
 .write = (void *)0,
 .user_data = (void *)0,
 .handle = 0,
 .perm = BT_GATT_PERM_READ,
 };

static struct bt_uuid_16 gatt_ccc_uuid = { .uuid = { BT_UUID_TYPE_16 }, .val = BT_UUID_GATT_CCC_VAL };
 static struct _bt_gatt_ccc ccc = {
 .cfg = {},
 .cfg_changed = pt_ble_nus_tx_ccc_cfg_changed,
 .cfg_write = (void *)0,
 .cfg_match = (void *)0,
 };
 pt_ble_nus.attrs[3] = (struct bt_gatt_attr) {
 .uuid = (struct bt_uuid *)&gatt_ccc_uuid,
 .read = bt_gatt_attr_read_ccc,
 .write = bt_gatt_attr_write_ccc,
 .user_data = (void *)&ccc,
 .handle = 0,
 .perm = BT_GATT_PERM_READ | BT_GATT_PERM_WRITE,
 };
}

void pt_ble_nus_attr_rx(void) {
 static struct bt_uuid_128 uuid = {
 .uuid = { BT_UUID_TYPE_128 },
 .val = { PT_BLE_NUS_UUID_RX_VAL },
 };
 static struct bt_uuid_16 gatt_chrc_uuid = { .uuid = { BT_UUID_TYPE_16 }, .val = BT_UUID_GATT_CHRC_VAL };
 static struct bt_gatt_chrc chrc_user_data = {
 .uuid = (struct bt_uuid *)&uuid,
 .value_handle = 0U,
 .properties = BT_GATT_CHRC_WRITE | BT_GATT_CHRC_WRITE_WITHOUT_RESP,
 };
 pt_ble_nus.attrs[4] = (struct bt_gatt_attr) {
 .uuid = (struct bt_uuid *)&gatt_chrc_uuid,
 .read = bt_gatt_attr_read_chrc,
 .write = (void *)0,
 .user_data = (void *)&chrc_user_data,
 .handle = 0,
 .perm = BT_GATT_PERM_READ,
 };
 pt_ble_nus.attrs[5] = (struct bt_gatt_attr) {
 .uuid = (struct bt_uuid *)&uuid,
 .read = (void *)0,
 .write = pt_ble_nus_rx_write,
 .user_data = (void *)0,
 .handle = 0,
 .perm = BT_GATT_PERM_READ | BT_GATT_PERM_WRITE,
 };
}

void pt_ble_nus_register(void) {
 static struct bt_uuid_16 gatt_primary_uuid = { .uuid = { BT_UUID_TYPE_16 }, .val = BT_UUID_GATT_PRIMARY_VAL };
 static struct bt_uuid_128 service_uuid = { .uuid = { BT_UUID_TYPE_128 }, .val = { PT_BLE_NUS_UUID_SERVICE_VAL } };
 pt_ble_nus.attrs[0] = (struct bt_gatt_attr) {
 .uuid = (struct bt_uuid *)&gatt_primary_uuid,
 .read = bt_gatt_attr_read_service,
 .write = (void *)0,
 .user_data = (void *)&service_uuid,
 .handle = 0,
 .perm = BT_GATT_PERM_READ,
 };

pt_ble_nus_attr_tx();
 pt_ble_nus_attr_rx();

pt_ble_nus.service = (struct bt_gatt_service) { .attrs = pt_ble_nus.attrs, .attr_count = ARRAY_SIZE(pt_ble_nus.attrs) };
	int result = bt_gatt_service_register(&pt_ble_nus.service);
 fd_assert(result >= 0);
}

bt_gatt_service_register not working

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