Write Long Characteristic VS Write Characteristic

[DS4]

HI

What is the difference between the two BLE commands?

From testing, I see that only the second works when I am writing to characteristic that is 1 byte long.

[Kenneth]

The message sequence charts show the difference:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.3.0/group___b_l_e___g_a_t_t_c___v_a_l_u_e___l_o_n_g___w_r_i_t_e___m_s_c.html 

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.api.v7.3.0%2Fgroup___b_l_e___g_a_t_t_c___v_a_l_u_e___w_r_i_t_e___m_s_c.html