https://devzone.nordicsemi.com/f/nordic-q-a/12148/connection-parameter-updateHi, First of all I appreciate the way nordic has put tutorials on the website for the newbies. I am working with putting custom services in my code, and its working well. I have initialize custom service in my code with READ and WRITE access toen-USTelligent Community 13Fri, 26 Feb 2016 11:47:12 GMThttps://devzone.nordicsemi.com/thread/45952?ContentTypeID=1Fri, 26 Feb 2016 11:47:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78fe77ea-abad-4841-bf3e-590251c56140run_ar<p>Have you looked at the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s110.api.v8.0.0/group___b_l_e___g_a_t_t_s___w_r_i_t_e___r_e_q___n_o___a_u_t_h___m_s_c.html">message sequence charts</a>?</p><div style="clear:both;"></div>