CC2340R5: Service Discovery

Sandeep Singh

Prodigy 30 points

Part Number: CC2340R5

Tool/software:

Hi,

Chipset Used:CC2340R5

SDK Version: simplelink_lowpower_f3_sdk_8_10_01_02

I am using the CC2340R5 in Central Role and used this example as a reference. The example code demonstrates how we can read and write from services and characteristics.

However, The handle values of read and write are hardcoded in the above example. What I am interested in is service discovery, If I can perform service discovery then I can perform read and write on any handle value that supports it.

Upon reading the "gatt.h" header file, I found that we have a function called "GATT_DiscAllPrimaryServices". Once I connect to a peripheral device, I call the below function.

I have also registered for the relevant events in dataGATTHandler as shown below.

I get a BLEAPPUTIL_ATT_READ_BY_GRP_TYPE_RSP event after 20 seconds but the there are no handles present in "attReadByTypeRsp_t" structure.

Please help me resolve the issue.

2 days ago

0 David 1 day ago

TI__Genius 12285 points

Hello Sandeep,

Thanks for reaching out.

May I ask where are you calling your SvcDiscovery function? Is it for instance after LINK_ESTABLISHED_EVENT? In addition, when you get BLEAPPUTIL_ATT_READ_BY_GRP_TYPE_RSP, how are you parsing (with attReadByTypeRsp_t I assume) the gattMsg message that is being passed by the handler? Some more code snippets of how you are implementing this would be ideal.

BR,

David.