Thingy91 LTE BLE sample, how to use BLE indicate ? Am able to get indication from server in on_received function, how do and what do i send as confirmation to the indication?

[Nageshj]

1.How to enable Indication as BLE client ?

2.what should  be bt_gatt_subscribe_params fields for using indication?

3.How to send back acknowledgment/confirmation to Server ? 

[Simonr]

Hi

1. To enable Indications on the Client side, you must write 0x0002 to the CCCD of the characteristic you want indications from. 

I'll have to get back to you on questions 2 and 3, as I'm currently waiting from some input on this from our NCS experts. Thank you for your patience.

Best regards,

Simon

[Nageshj]

Thanks for your reply 
i will try that

[Simonr]

2. Indicationas are supported by the bt_gatt_indicate() API. Subscriptions to indications can be set by calling BT_GATT_CHRC_INDICATE (to permit indications of a characteristic value with acknowledgment), and BT_GATT_CCC_INDICATE to make characteristic values be indicated. The callback is called notify, but you'll get indications.

3. Make sure to use bt_gatt_write for writing to ensure responses/acknowledgements.

All of this is specified in the Zephyr GATT documentation here.

Best regards,

Simon

[Nageshj]

Thanks Simonr