Posts Tagged 'wx200'

Connect your weatherstation (wx200) to the internet using the wl500g router.

Hardware needed

• wx200 weatherstation
• usb flashdrive to store the weatherdata (you'll need a wl500gx or a usb hub)
• usb to serial dongle (pl2303 or generic usb serial adapters are supported)
• wl500g or wl500gx (with usb) or a serial port

Modules needed

• Driver for the profilic 2303 (pl2303.o) or other serial converter
• Serial to USB converter (usbserial.o)

Install with:

ipkg install kmod-usb-serial
ipkg install kmod-usb-serial-pl2303

Programs needed (static compiled)

• wx200d program
• wx200 program
• wxread program (for testing)
• wx200rrd.sh (script to store data in rrd database and create graphics)

Download the static wx200d package .

Optional

• bzip2 (better compression as gzip)
• macsat cron tutorial
• awk
• wget, wput, scp, or curl to upload the data
• macsat rrdtool tutorial

With these tools you can create nice weather graphs on your wl500g and upload the data to a 'real' server.

Links

• wx200d
• WL500g
• openwrt
• macsat ASUS WL guides
• A different weather station"One Wire Weather
• RRDWeather

Howto install the weather software

Upload the files to the wl500g. Connect the wx200 with the serial adapter to the wl500g

Load the modules

insmod usbserial.o insmod pl2303.o

Set the execute bit on the program

chmod u+x wxread wx200d wx200

Check if you get a signal of the weatherstation

wxread /dev/usb/tts/0

weird characters are displayed after about 30 seconds, press CTRL-C to stop the program

Start the wx200d program

wx200d -s /dev/usb/tts/0 -w tmp -b

Writes the ascii logs to the /tmp directory, if you don't have enough diskspace and don't want logfiles add

wx200d -s /dev/usb/tts/0 -w tmp -a -b

Put this line in the startup after the usb serial modules are loaded.

Display the current weather

wx200

Howto upload the weather data using cron

Install cron, see  macsat cron tutorial   or openwrt tutorial

Display the current weather on one line without units in centigrades and hectopascal and no errors

#!/bin/sh
url="http://yoursite/scriptname"
query="`wx200 -ul --C --hpa -e| awk '{print "temp="$1"&humid="$3"&baro=" $7}'`"
options="-q -O /dev/null"
wget ${options} "${url}?${query}"

Current weather on the wl500g

Get current weather from the wl500g. WARNING! Dont use it on a public server! It's not a secure script!!!

 

If you installed an webserver with cgi, you can link:

ln -s /usr/sbin/wx200 /www/cgi-bin/

And use the http://wl500g/cgi-bin/wx200 to get a simple weather report. You can tweak the arguments http://wl500g/cgi-bin/wx200?-h

Howto create weather graphs

Install rrdtool, see macsat rrdtool tutorial .

I edited the script from 'the macsat rrdtool tutorial'. It creates 2 more graphs for humidity and barometer. The rrd database is about 110K. I placed the file on the ramdisk. (faster read and write, then the flash memory)

Link the images (and or the html pages) in the www directory

ln -s /tmp/*.png /www

ln -s /tmp/*.html /www

Add the script the to crontab

*/5 * * * * /usr/sbin/wx200rrd.sh

Compiling wx200d

If you want to compile wx200d yourself, there is a package in openwrt svn repository