Auto Notification after char write

[patjshan]

Hi All,

I am developing a custom BLE profile for my current project and several of my characteristics are write/notify characteristics. I am finding that when I write a new characteristic value to them I get an automatic notification back (one that I have not coded into the firmware) containing the old value of the characteristic. Is this auto notification a feature of the nordic softdevice? or am I most likely just missing something in the application code that is sending out of date data? 

setup: Windows 10, SDK 15.3, sd s132 Ver 6.1.1, HW nrf52832

any and all help is appreciated!

Thanks,

Patrick

[Kenneth]

Hi, 

Is this auto notification a feature of the nordic softdevice? or am I most likely just missing something in the application code that is sending out of date data? 

First: No. Second: Yes.

I assume the relevant sequence charts are:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.2.0/group___b_l_e___g_a_t_t_s___w_r_i_t_e___c_m_d___n_o___a_u_t_h___m_s_c.html

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.2.0/group___b_l_e___g_a_t_t_s___h_v_n___m_s_c.html

Kenneth