Characteristic not updating after moving it to app stack

[ael-mess]

Hello, I hope you are doing well.

I am using the nRF52832 with the SDK16. After adding some new custom characteristics, I didn't have enough space in the BLE_GATTS_VLOC_STACK, so I moved the characteristic data location to BLE_GATTS_VLOC_USER. After that one of the characteristics is still showed but the value of the characteristic is not updating.

    attr_md.vloc    = BLE_GATTS_VLOC_USER;

• Do you know where it could come from ?
• Is it possible to add memory space to BLE_GATTS_VLOC_STACK ?

Best regards,

[Vidar Berg]

Hello,

You can allocate more memory for BLE_GATTS_VLOC_STACK by increasing the attribute table size (NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE setting in sdk_config.h), and I think that's the easiest solution.

I'm not sure why attribute data is not updated when you use VLOC_USER. Maybe ble_gatts_value_t::p_value is NULL?

Best regards,

Vidar