10 WIKA additional operating instructions for redio fequencies
EN
14683475 .01 05/2024 EN/DE
3. Data transmission security
3.1 Bluetooth
®
Low Energy
Bluetooth
®
Low Energy communicates in the licence-free 2.4 GHz ISM band and is a globally harmonised energy
ecient radio standard.
Bluetooth
®
Low Energy uses 40 channels between 2.402 GHz and 2.480 GHz.
Encryption is performed using the AES 128 encryption algorithm in combination with distributed key replacement.
The instrument transmits the measured pressure and temperature value as an optional broadcast message on the
advertising channels 37, 38 and 39, in addition to the instrument name and the battery charge status.
Further information and detailed conguration and command options are available via a point-to-point connection.
Pairing is established using a passkey entry method and requires the entry of a security code.
Pairing is established using a passkey entry method and requires the entry of a security code.
Instrument settings can only be accessed after pairing has been completed. The pairing key for each
instrument is random. The initial pairing key can be found on the enclosed quick start guide.
If the security code is entered incorrectly 5 times, the instrument is blocked for connection with this
code. After disconnecting the voltage supply or removing the battery, 5 attempts are once again
available. If this is not possible for technical reasons, e.g. because the sensor cannot be reached to
open the case, contact technical support.
3. Data transmission security
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