READ_NOT_PERMITTED when using GATT_DiscAllPrimaryServices in BTool

David Elliott1

I added the simpleGATTprofile to the keyfobdedmo and thought I had it all working. However when I use GATT_DiscAllPrimaryServices in BTool it discovers all services then returns a READ_NOT_PERMITTED then a success.

[620] : <Rx> - 03:59:54.510
-Type		: 0x04 (Event)
-EventCode	: 0xFF (HCI_LE_ExtEvent)
-Data Length	: 0x0A (10) bytes(s)
 Event		: 0x0501 (ATT_ErrorRsp)
 Status		: 0x00 (Success)
 ConnHandle	: 0x0000 (0)
 PduLen		: 0x04 (4)
 ReqOpcode	: 0x10 (ATT_ReadByGrpTypeReq)
 Handle		: 0x0040 (64)
 ErrorCode	: 0x02 (READ_NOT_PERMITTED)
       		: The Attribute Cannot Be Read.
Dump(Rx):
04 FF 0A 01 05 00 00 00 04 10 40 00 02 
------------------------------------------------------------------------------------------------------------------------
[621] : <Rx> - 03:59:57.003
-Type		: 0x04 (Event)
-EventCode	: 0xFF (HCI_LE_ExtEvent)
-Data Length	: 0x0B (11) bytes(s)
 Event		: 0x0607 (GAP_LinkParamUpdate)
 Status		: 0x00 (Success)
 ConnHandle	: 0x0000 (0)
 ConnInterval	: 0x0640 (1600)
 ConnLatency	: 0x0000 (0)
 ConnTimeout	: 0x0258 (600)
Dump(Rx):
04 FF 0B 07 06 00 00 00 40 06 00 00 58 02

When I do not call SimpleProfile_AddService( GATT_ALL_SERVICES ) then I do not get the read not permitted.

I did change the simpleGATTprofile slightly by adding a few more characteristics but they all work fine. When I try to read/write to them they all work and I have no errors. I even get callbacks to the correct functions.

This causes errors though when the iphone apps like Multitool try to connect as they give an error that services are not found when I call SimpleProfile_AddService( GATT_ALL_SERVICES ).

The problem does appear to be the call of GATTServApp_RegisterService but it looks identical to the default simpleProfile version.

Does anyone have any ideas on this? I can post code snippets of functions if anyone wants.

over 11 years ago

0 Greenja over 11 years ago

Guru 22270 points

Hello David,

Did you setup the properties as per the examples software? http://www.ti.com/lit/ug/swru271f/swru271f.pdf

static uint8 simpleProfileChar1Props = GATT_PROP_READ | GATT_PROP_WRITE;

Thanks,

0 David Elliott1 over 11 years ago in reply to Greenja

Intellectual 295 points

Hello greenja,

Yes I set up each for read and write as you suggest.

The problem is not when I try to read/write each characteristic but when I use the command GATT_DiscAllPrimaryServices in the BTool tab Adv. Commands.

That command finds all characteristics and I can then see them all and read/write to them but it returns read not permitted and does not find the simpleprofile but I can still use the write and read commands to interact with them through BTool.

0 Greenja over 11 years ago in reply to David Elliott1

Guru 22270 points

Hello David,

I would have to investigate that command when I am at my computer. One thing you can try is to use load another App, something you haven't modified and see if you get the same response. This way you can tell if it is from one of your profiles or not. It may be that another service doesn't have the permission set and not yours.

Thanks,

0 David Elliott1 over 11 years ago in reply to Greenja

Intellectual 295 points

I figured out the issue. For the simpleProfile primary service UUID I had permission set as GATT_PROP_READ. Apparently this was not working for me so changing it to GATT_PERMIT_READ worked and it is readable and discover-able.

0 Adris MOUANDA over 11 years ago

Prodigy 70 points

Hi,

I haven't BTool but i want to discover the services of my peripheral device. Can you tell me what's the Dump Tx please?

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READ_NOT_PERMITTED when using GATT_DiscAllPrimaryServices in BTool