Technical data

4. Packages
WLAN_x_NOESSID Deactivates sending ESSID during beacon frames. Only valid with
hostap_* driver and Firmware = 1.6.3 in WLAN_MODE=’master’
This feature is optional and has to be added manually in config/wlan.txt.
WLAN_x_CHANNEL Sets the transmission channel of the network.
Default setting: WLAN_x_CHANNEL=’1’
Possible values: 1-13 and 36,40,44,48,52,56,60,64,100,104,108,112,116,120,124,128,132,
136,140
Please read the documentation of your WLAN card to find out which channels are allowed
to use in your country. You are responsible for any rights violation by using channels
not allowed. In Germany channels 1-13 in 2,4 GHz frequency range (Modes: b and g)
are allowed. Channels 36-140 (see above) are legally allowed in 5 GHz frequency range.
Value ’0’ is also valid if WLAN_x_MODE=’managed’ is set. This does not set a particular
channel explicitely but searches for an AP an all valid channels. You may add the
character a,b or g to the channel (i.e. 5g) which will then determine the operating mode
and frequency range.
Adding ’n’ or ’N’ triggers usage of 802.11n for according WLAN cards. Lower case means:
20 MHz channel width, upper Case means: 40 MHz channel width.
Upper case for a/b/g will activate proprietary WLAN turbo modes with some drivers
(at the moment only ath_pci). This option is experimental and may be removed at any
time.
WLAN_x_RATE Sets transmission speed of the network.
Default setting: WLAN_x_RATE=’auto’
Possible values: 1,2,5.5,11,auto - rates in Megabit/s
Depending on the card this rates can be chosen in addition: 6,9,12,18,24,36,48 and 54.
Some 54 MBit cards don’t accept rate settings. In this case specify ’auto’ here.
WLAN_x_RTS Activates RTS/CTS handshake. This option is useful in bigger WLANs with
a lot of clients if those clients can’t receive each other but only the AP. If this option
is activated the client will start each transmission with a RTS query to get permission
for the actual data transmission. It gets a CTS from the AP then providing permission
to send. This way every client knows another client is transmitting without receiving
the other client. Collisions are minimized because it is ensured that only one client is
transmitting data at a time. This option only makes sense in the situation described
above because of additional overhead and thus decreasing bandwidth. Bandwidth can
raise by avoiding collision though.
This feature is optional and has to be added manually in config/wlan.txt.
WLAN_x_ENC_N (deprecated) Sets the number of Wireless Encryption Key’s (WEP).
Possible values: 0-4
WLAN_x_ENC_x (deprecated) Sets Wireless Encryption Keys.
Possible values:
235