In all ST devkit code, the commandaci_hal_set_tx_power_level(0,25)is used, but changing the parameters has no effect on the transmit power (is always about 0dBm).

In a non-encrypted BLE link, the device falls back to the level of minimum power consumption (STOP_NOTIMER) between connection events. In an "LE Secure" link, the CPU is kept active. Why, and what to do about that?

The chip has an API for the AES encryption HW, but I cannot find any access option to the AES decryption HW.