sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

frogofmagic — Sat, 14 Nov 2015 03:14:30 GMT

I see , Thanks :)

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

Bill Siever — Fri, 13 Nov 2015 13:44:34 GMT

frogofmagic, I suspect the SoftDevice RAM segment has different internal buffers: 1) space to save the values of Characteristics and 2) space reserved for radio processing needs. I've received these sorts of memory errors on projects that used several somewhat long characteristics (i.e., my data used all the internal buffer space available for characteristics). I was able to work around the limitation by placing some of the characteristics in user RAM rather than have the Soft Device manage them (vloc set to BLE_GATTS_VLOC_USER).

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

frogofmagic — Fri, 13 Nov 2015 09:00:36 GMT

Hi Bill, I found my IC is 16KB ram, and my code use 5.4KB and S130 use 10KB. Will this cause the No Memory for operation error?

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

frogofmagic — Fri, 13 Nov 2015 02:08:59 GMT

Hi Bill, I'll try it, thanks a lot. :D

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

frogofmagic — Fri, 13 Nov 2015 02:05:54 GMT

Hi Petter, Thanks for your advice. I'm not sure my project can work on SDK9 or 10. I will try it :)

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

Petter Myhre — Thu, 12 Nov 2015 12:55:11 GMT

Do you mean \examples\ble_central_and_peripheral\experimental\app_s130_demo ? This is not a very good example. Maybe you can try \examples\ble_central_and_peripheral\experimental\ble_app_hrs_rscs_relay from SDK 9 or 10?

RE: sd_ble_gatts_characteristic_add() error code 0x4 No Memory for operation.

Bill Siever — Thu, 12 Nov 2015 12:43:17 GMT

This probably indicates that your characteristics are consuming all of the Soft Device memory that's available for characteristics.

If this is the case you can overcome it by keeping some characteristics in user memory. You can do this by setting the vloc variable of the characteristic's ble_gatts_attr_md_t to BLE_GATTS_VLOC_USER. You will need to make sure that you use persistent memory for the characteristics (like a global or static local variable rather than just a stack local).

See http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s130.api.v1.0.0%2Fstructble__gatts__attr__md__t.html and search the forum for vloc for more info.