I want to realize "LE Security Mode 1: Level 4".However, there is no IO capability in both devices.
I tried the following.1) Set the IO capability of both devices to "BLE_GAP_IO_CAPS_DISPLAY_YESNO".2) With this setting, the authentication operation is performed with "Numeric Comparison".3) Reply "YES" unconditionally on both devices. (No operation by the user)
In the above case, "auth_status.sm1_levels.lv4 = 1" was obtained at the "BLE_GAP_EVT_AUTH_STATUS" event.However, since there is no IO capability, there is no operation from the user.Even in that case, is it OK to think that "LE Security Mode 1: Level 4" was realized?Also, are there any security concerns about the lack of user interaction?
Thanking you in advance.
Please check out:
Also, since you are in specific asking about Numeric Comparison:
This may also be useful for an overview: