cc2640 GATT server sends large data

Peter Huang

Hello,

I didn't copy that code to my project, but followed its point to change PDU/PDU size and heap memory size, then Rebuild project.

#define MAX_NUM_PDU                   6
#define MAX_PDU_SIZE                  107

I use android app (BlueLoupe) to read charValue, but GATT server can only response MAX_NUM_PDU times, then it stop and never response any data.

Why it dosen't work?

over 10 years ago

0 JXS over 10 years ago

TI__Guru** 105180 points

Hi,

I have no idea. Since you didn't provide your code or any description of your changes, it's difficult to provide guidance. As the example highlights, there's a lot more that goes into sending the GATT data than just changing the #defines.

Best wishes

0 Peter Huang over 10 years ago in reply to JXS

Expert 1050 points

Hi JXS,

Thanks for your reply.

I didn't change ReadCB function, it's just sample code.

 case SIMPLEPROFILE_CHAR1_UUID:
          *pLen = GATT_CHAR1_LEN;
          VOID memcpy( pValue, pAttr->pValue, *pLen );
          break;

When I change #define followed by that example, it will become weird that each ReadCharValue command doesn't work after MAX_NUM_PDU times.

As I set to default value, it will be fine.

What parameters should I change more than just MAX_NUM_PDU and MAX_PDU_SIZE? ATT_MTU_SIZE or L2CAP parameters?

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cc2640 GATT server sends large data