How to force a CCC value

[dlktdr]

Hello all hoping someone can help me here.

I'm trying to communicate with a BLE central device which doesn't do a subscription request to get the notifications required. (https://www.horusrc.com/en/frsky-horus-x10-para-wireless-module.html)

Is there some way I can force the CCC value to BT_GATT_CCC_NOTIFY (0x01) in Zephyr on my characteristic so it will send the data even though it hasn't specifically requested it?

I defined the service and characteristics statically pretty much the same as the peripheral example.

BT_GATT_SERVICE_DEFINE(bt_srv,
    BT_GATT_PRIMARY_SERVICE(&btparaserv),
    BT_GATT_CHARACTERISTIC(&btparachar.uuid,
                           BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY,
                           BT_GATT_PERM_READ | BT_GATT_PERM_WRITE, read_ct,write_ct,ct),
    BT_GATT_CCC(ct_ccc_cfg_changed, BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
    );

Thank you for any assistance. I've been porting this project from Arduino and MBED... I'm liking this way more. Thanks for all your hard work!

[dlktdr]

Figured it out, did this in the connected callback. Seems to do what I was looking for!

uint8_t ccv = BT_GATT_CCC_NOTIFY;
bt_gatt_attr_write_ccc(conn, &bt_srv.attrs[3], &ccv, 1 , 0, NULL);