Way to check if device is Bluetooth paired (even if not currently connected)?

[responsible_duck]

We want to know if device is already Bluetooth paired. We can check for this manually in the shell by using `settings list` command and seeing bt/keys as one of the stored properties. However, is there an API to do this? We don't see anything int he settings.c module

[Vidar Berg]

Hello,

You can use bt_foreach_bond() to find the addresses of the peer(s) that are bonded with your device.

static void bond_cb(const struct bt_bond_info *info, void *user_data)
{
	ARG_UNUSED(info);

	*(int *) user_data += 1;
	LOG_INF("Existing bond found");

	return;
}
    ...
    int bond_num = 0;
    bt_foreach_bond(BT_ID_DEFAULT, bond_cb, &bond_num);
    ...

Best regards,

Vidar