Advertising failed to start (err -12)

[Sunil vignesh]

Hi,

I am testing peripheral_hids_keyboard of NCS SDK 1.4.2

I have issues

1. where i can able to connect with windows and Android system but it is not visualize in MAC or IOS

2. I got issue Disconnected from 00:1a:7d:da:71:15 (public) (reason 21)
Advertising failed to start (err -12)

[Øivind]

Hi,

Have you tried CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT=y , like Carl suggested? You tried GATT, but I can't see that you tried HIDS.

Did you follow Carl's advice: "... your advertising data may be bigger than the maximum of 31 bytes. Please check this." ? What did you find?

You are using an old version of the sdk, have you considered upgrading to v1.6.0 and seeing if that fixes your issues?

[Sunil vignesh]

Hi, I have enabled CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT

This is my full prj.confg

CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_BT=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=1
CONFIG_BT_SMP=y
CONFIG_BT_L2CAP_TX_BUF_COUNT=5
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="Nordic_HIDS_keyboard"
CONFIG_BT_DEVICE_APPEARANCE=961

CONFIG_BT_BAS=y
CONFIG_BT_HIDS=y
CONFIG_BT_HIDS_MAX_CLIENT_COUNT=1
CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT=y
CONFIG_BT_GATT_UUID16_POOL_SIZE=40
CONFIG_BT_GATT_CHRC_POOL_SIZE=20

CONFIG_BT_LL_SOFTDEVICE_DEFAULT=y

CONFIG_BT_CONN_CTX=y

CONFIG_BT_DIS=y
CONFIG_BT_DIS_PNP=y
CONFIG_BT_DIS_MANUF="NordicSemiconductor"
CONFIG_BT_DIS_PNP_VID_SRC=2
CONFIG_BT_DIS_PNP_VID=0x1915
CONFIG_BT_DIS_PNP_PID=0xEEEF
CONFIG_BT_DIS_PNP_VER=0x0100

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y
CONFIG_BT_SETTINGS_CCC_STORE_ON_WRITE=y
CONFIG_DK_LIBRARY=y

CONFIG_BT_MAX_CONN=1
CONFIG_BT_MAX_PAIRED=1

CONFIG_BT_HIDS_MAX_CLIENT_COUNT=1

this error occur during disconnect

then i tried

CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=1

CONFIG_BT_HIDS_MAX_CLIENT_COUNT=1

If CONFIG_BT_MAX_CONN = 1 does i need to change any config or advertise packet  

[Øivind]

You can not have CONFIG_BT_MAX_CONN=1 when you call advertising_start() from the disconnected() handler. That is why it is 2 by default.