projects:openwrt:info
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| + | The Linksys WRT54GS WLAN-Router is a powerful cheap device useable for hamradio. It is about 75,- €, but you have to care which subversion you buy. Please check http://openwrt.org and http://www.seattlewireless.net/index.cgi/LinksysWRT54GS for further details about flash memory and capabilities to use OpenWRT. | ||
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| + | Arsene, LX1TB has modified the Linksys WRT54G(S) models to tune the frequencies below 2400 MHz for better fit with the hamradio bandplans ;-) Look on his german website to get the details: http://www.rlx.lu/~lx1tb/wrt54gs/. | ||
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| + | The WLAN-Router has a MIPS 200 MHz CPU, 32 MB RAM, 8 MB Flash, WLAN 802.11b, a 5-port switch and 2 serial ports which have to be upgraded by hand (without hardware handshake). See http://www.rwhitby.net/wrt54gs/serial.html for the serial modification. The ports support up to 460k8 serial transfer rate !! | ||
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| + | The WRT54GS for hamradio usage has been presented at the 21th international packet radio meeting in Darmstadt, Germany. There's a German summary available: [[projects:openwrt:info:prtagung|Packet Radio Tagung 2005]] (nice pics if you can't read German ;). | ||
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| + | Some useful hints for hamradio operators: | ||
| + | * The serial modification is just a MAX3232 (3.3Volt) and five 0.1 µF tantal capacitor (if you need serial speed >115k2 DD4RD suggests to use a MAX3380 which can be obtained at http://www.segor.de for example). | ||
| + | * On my WRT54GS /dev/tts/0's default IRQ is 3. /dev/tts/1 is set to IRQ 0. To set /dev/tts/1 to IRQ 3 use setserial. Add "src florian http://openwrt.alphacore.net" to ipkg.conf and install setserial with "ipkg update", "ipkg install setserial". Run Setserial: "/bin/setserial /dev/tts/1 irq 3". Now you can use /dev/tts/0 AND /dev/tts/1 for any serial device at the same time. | ||
| + | * To initialize a Kenwood TH-D7 for KISS-Usage I have a ugly workaround. First Start Digi_Ned with "digi_ned -p /dev/tts/0:9600:1". After startup cancel operation with CTRL+C. The serial ports keeps initialized with 9k6. Now send the TNC-commands for switching to KISS: echo -e "\015softdcd on\015kiss on\015restart" >/dev/tts/0. The TH-D7 will indicate changing to KISS by blinking STA CON on the display. | ||
| + | * The wireless bridge will NOT work in ad-hoc or clientmode ! You have to use WDS and AP-Mode for bridging !! | ||
| + | * Get "wl" for using one antenna for TX (wl txant 1) and the other for RX (wl antdiv 0). 0 = antenna @dc-plug, 1 = antenna @reset-switch. Add "src ab0oo http://www.wildcatwireless.net/wrt54g" for getting an archive with "wl" (ab0oo is also a hamradio operator ;) | ||
| + | * You can adjust TX-Power with "wl txpwr 0-255" up to about 160mW. "wl txpwr 100" and above will cause some by-products. Be careful not to overheat the device. Here's a little table (round about): | ||
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| + | |wl txpwr |mW | | ||
| + | |0 |0.5 | | ||
| + | |3 |3 | | ||
| + | |6 |5 | | ||
| + | |17 |12 | | ||
| + | |30 |25 | | ||
| + | |70 |50 | | ||
| + | |200 |125 | | ||
| + | |250 |160 | | ||
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| + | Adding an SD card reader to the WRT54G: http://kiel.kool.dk/ | ||
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| + | 73 de DG8NGN, DL5RB & DL9SAU | ||
projects/openwrt/info.txt · Last modified: 2014/01/12 13:12 by jann
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