Multiple notify characteristics

[Phillip]

Hi

I'm trying to create a custom ble service with 4 notify characteristics. Everything works with one characteristic, but when i add the other the DK hangs.

I'm using SDK11 with S130.

I made it work with two characteristics when i give the second characteristic following CCCD metadata:

BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);

But i don't want it to be writable.

Can anybody help me out?

My service code is attached.

footsensor_service.h

footsensor_service.c

[MartinBL]

Hi

The CCCD has to be writeable. That is the whole point. CCCD stands for Client Characteristic Configurable Characteristic Descriptor. Note the words Client and Configurable. The CCCD is intended to be a way for the client to remotely enable notifications and indications and hence naturally has to be writeable. Your characteristic value on the other hand can have whatever read and write properties you want.

[Phillip]

Ah thanks! Works now.

[strengthstrong]

but how read , in my code , dont have "char_md.p_cccd_md = &cccd_md;" but cccd work well,

memset(&cccd_md, 0,  sizeof(cccd_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
cccd_md.vloc      = BLE_GATTS_VLOC_STACK;

this dont waste? dont have to?

[MartinBL]

I don't understand your question. You don't have the lines:

char_md.p_cccd_md = &cccd_md;

in your code, but CCCD still works?