Point-to-Point/SIK Firmware User Manual
4.3 AT Commands Examples
Encryption
The 128/256 bit AES data encryption may be set, enabled or disabled using the AT commands (see
Table 4.1). The encryption key can be any 32/64 character hexadecimal string.
First enter AT command mode by typing ‘+++’ and waiting for a moment till an ‘OK’ from the modem.
Then to activate encryption on a device, the encryption mode must first be enabled by typing
‘ATS15=1’ in the command terminal. Once the encryption mode is active, an encryption key may be
set after typing ‘AT&E’ into the command terminal. The encryption key may be of any 32/64
character hexadecimal string of the users choosing. Any devices with different encryption settings
will not be able to properly decode data.
ATS15=1
AT&E=5AEEF103125C0AA233678909160111CA
AT&W
ATZ
Airdata rate
Reducing the air speed can help to increase the range and link quality limits the data throughput.
Considerations for the air speed setting:
• The desired range
• The amount of data across the link
• Whether you send data in one direction or both
• Whether you have enabled flow control on the serial link
It is important to note that the air rate should be set to a higher value then the baud rate to prevent
bottlenecking and data loss.
Example of changing air data rate:
ATS2=224
AT&W
ATZ
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