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)

[Sunil vignesh]

any update

[Sunil vignesh]

also When the example code : hid_keyboard connect with the IOS device not able to print the "hello" when button pressed

Ignoring data for unknown CID 0x003a

[Sunil vignesh]

Is there any update

[Marjeris Romero]

HI,

Carl tried to provided some help in this ticket. Have you tried his solution?

Best regards,

Marjeris

[Sunil vignesh]

Yes, I have followed this ticket,

also spoke with carl at end

He said "Error -12 means ENOMEM, which suggests your advertising data may be bigger than the maximum of 31 bytes. Please check this. "

this error comes only when is disconnected from the user device which means for the first time the advertising packets are working properly and then during disconnect how it will change

For my project i just need to connect with one particular device only from the example code i have changed the config as

CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=2

CONFIG_BT_HIDS_MAX_CLIENT_COUNT=2

to

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

now during disconnect it work advertising but rarely it doesn't advertise