SERVICES Discovery between slave and BTOOL

Nicolas MICHEL59

Other Parts Discussed in Thread: CC2541

Hi EveryBody

I created a communication between a slave (cc2541 msp430 +) and a Masters (BTOOL).

I created a service on slave :

packet[0] = 0x01; //command
packet[1] = 0xFC;//opcode
packet[2] = 0xFD;//opcode
packet[3] = 0x05; parameter length
packet[4] = 0x00; // UUID (Primary Service)
packet[5] = 0x28; // UUID (Primary Service)
packet[6] = 0x02; // nbr d'attribut
packet[7] = 0x00; // nbr d'attribut
packet[8] = 0x07; //EncKeySize

I created attribute on slave :

packet[0] = 0x01;//command
packet[1] = 0xFE;//opcode
packet[2] = 0xFD;//opcode
packet[3] = 0x03;//parameter length
packet[4] = 0x00; // UUID (Primary Service)
packet[5] = 0x28; // UUID (Primary Service)
packet[6] = 0x01;//permission

I received Statut Ok for each command

With Btool I send GATT_DiscAllPrimaryServices

I received this event on Slave

I want respond with my services with Att_ReadByGrpTypeRsp command

packet[0] = 0x01;//command
packet[1] = 0x11;//opcode
packet[2] = 0xFD;//opcode
packet[3] = 0x03;//parameter count
packet[4] = 0x01; // attribute length
packet[5] = 0x00;
packet[6] = 0x28;

But I have always ACK response : statut = 0x02 INVALIDPARAMETER

Can you help me please

over 9 years ago

0 Tim C over 9 years ago

TI__Mastermind 34660 points

I would recommend taking a sniffer capture and comparing to a working sniffer capture using an embedded project (i.e. simpleBLEPeripheral) to find a stating point to debug. You could the start modifying the embedded profile to match what you are trying to accomplish and compare this to the working simpleBLEPeripheral example to see where the error is.

SimpleLinkAcademy also goes through the steps of creating a profile: software-dl.ti.com/.../overview.html

0 Nicolas MICHEL59 over 9 years ago in reply to Tim C

Intellectual 945 points

thanks for your response

I used Sniffer but there is nothing because the slave don't send message because the command Att_ReadByGrpTypeRsp is not OK (return ACK statut 0x02 or 0x40)

0 Tim C over 9 years ago in reply to Nicolas MICHEL59

TI__Mastermind 34660 points

Well there is certainly something on the sniffer. I'm assuming you see a connection established and some ATT traffic. The idea here is to compare the broken ATT traffic to working ATT traffic (simpelBLEPeripheral) to see where your error is.

0 Nicolas MICHEL59 over 9 years ago in reply to Tim C

Intellectual 945 points

Yes on sniffer there is connection event but there is ATT_Read_By_Group_Type_Req traffic but there is not traffic for my response

0 Nicolas MICHEL59 over 9 years ago in reply to Nicolas MICHEL59

Intellectual 945 points

For your information I have is spi communication for this problem but i can't join file in this post

0 Nicolas MICHEL59 over 9 years ago in reply to Nicolas MICHEL59

Intellectual 945 points

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/538/DiscAllPrimaryServices.7z

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SERVICES Discovery between slave and BTOOL