How can I reconnect BT on SPP. If a device are paired but have become disconnected. I want to know about API

[Anonymous]

I'm developing a Alexa gadget using cyw20735.

I success a paring with Amazon Echo. but I can not reconnect after disconnection.

I attempted process following:

*Device Reset -> Interrupt -> 

          wiced_bt_spp_connect(bda);

----------------------------------------

<log>

p_scb->server_addr :44 00 49 26 88 d7

spp_sdp_cback

spp_sdp_cback status:0x0

spp_scb :01 01 00 00 00 00 00 44 00 49 26 88 d7 00 00 00 18 c1 24 00

spp_sdp_find_attr

Looking for SPP service

p_scb->server_addr :44 00 49 26 88 d7

spp_sdp_find_attr() - could not find SPP service

spp_rfcomm_start_server

spp_rfcomm_start_server

spp_rfcomm_start_server: rfcomm_create Res: 0x0  Port: 0x0004

spp_connection_not_found_callback

spp_sdp_free_db

------------------------------------------

please let me know how to reconnection process.

[AnjanaM_61]

Hi,

Could you please let us know the WICED studio version which you are using?

Thanks,
Anjana

[Anonymous]

Hello, anam!

I'm using WICED Studio™ v6.2.1.

Thanks,

Han

[AnjanaM_61]

Hello Han,

Could you please check if in the spp_lib.c ( /20735-B0_Bluetooth/libraries/spp_lib/spp_lib.c )  file whether  RFCOMM_RemoveServer (p_scb->rfc_serv_handle); function is used (in functions wiced_bt_spp_connect , spp_rfcomm_do_open) ? 

If then, could you please replace it with below function call and try if it fix the issue

wiced_bt_rfcomm_remove_connection ( p_scb->rfc_serv_handle, WICED_TRUE );

If this is not fixing the reconnect issue, please provide the below details for further proceeding:

1. Please share spp_lib.c file in your SDK (without modifying)

2. Please share your spp project and steps to reproduce the issue.

Thanks,
Anjana

[Anonymous]

Hi, Anjana

Thanks your reply!

I can not fix this problem about reconnect issue.

I atteched spp_lib.c and spp project .

source link : https://drive.google.com/open?id=1XOM61kZ0wvet_LCS0t8AEIOHS48BpGe4

Thanks,

Han.

[AnjanaM_61 · Accepted solution]

Hi Han,

Amazon echo seems to support only A2DP & AVRCP BT profiles https://www.amazon.com/gp/help/customer/display.html?nodeId=202179330 ​

So You can't do a SPP connection with Amazon echo from your Alexa gadget I think.

Thanks,

Anjana