RE: what is max num all of Characteristics in the project?

lgj — Sat, 05 Mar 2016 03:03:26 GMT

Yes, i confirm it return NRF_SUCCESS. If I use BLE_GATTS_VLOC_USER instead of BLE_GATTS_VLOC_STACK,it also to .And i had make the ble_enable_params.gatts_enable_params.attr_tab_size = 0x700; it also to .

It maybe has no attribute memory .

Then I reference RK answer.RK 'S ANSWER I Configuration my project IROM1 size from 0x28000 to 0x28200,and set ble_enable_params.gatts_enable_params.attr_tab_size = 0x900; it successs,I can add Characteristic. thanks for your answer.

RE: what is max num all of Characteristics in the project?

Petter Myhre — Fri, 04 Mar 2016 11:49:21 GMT

It is not an exact number. It depends on different factors.

I'm a bit suprised that you get NRF_SUCCESS if the attribute table is full, I would expect NRF_ERROR_NO_MEM. Please confirm, and I will check it out.

You can set the size of the attribute table when you enable the SoftDevice, examine the struct given to sd_ble_enable()

Another trick is to store the attribute value in user memory, instead of stack memory. Use BLE_GATTS_VLOC_USER instead of BLE_GATTS_VLOC_STACK. Then you of course need to ensure that the value has a valid location in user memory.