if any body know how to use cr1000 logger catch data from davis weather station?
Rolis,
Certainly the question must be asked ... why would you want to do this? The CR1000 has the ability to take much better measurements than the Davis station. If the answer is you are looking for a lower cost station that integrates with LoggerNet, please check out WeatherHawk (http://www.weatherhawk.com/) as their stations use PakBus communications and integrate seamlessly with LoggerNet.
To query the data from the Davis weather station, you need to become very familiar with the CRBasic Serial I/O commands and Davis' serial protocol.
Review the following documents:
http://www.campbellsci.com/documents/technical-papers/serial.pdf
http://www.davisnet.com/support/weather/download/VantageSerialProtocolDocs_v230.pdf
Hi Sam,
Tks,you know customer already have davis station in used,now we want to setup soil moisture station at side,so want to query the data from the Davis weather station,then send full data out via GPRS to center.
I have some applications for that topic
You can Use TTL interfaz and specific commands
this is a little part:
Lectura TTL para la estacion Davis mediante el puerto COM1 del CR800 ( C1 = Tx y C2 = Rx)
SerialOpen (Com1,9600,19,1,10000)
SerialFlush (Com1)
SerialOut (Com1,"LOOP 1" + CHR(13) + CHR(10) ,CHR(6),1,0)
Delay (1,500,mSec)
LLEGA = SerialInChk(Com1)
For I = 0 To LLEGA
SerialInBlock (Com1,DESTLOOP(I),1)
Next I
SerialFlush (Com1)
For I2 = 1 To 100
If DESTLOOP(I2) = CHR(06) Then
I2 = I2 + 1
For I=0 To 98
DESTLOOP2(I+1) = DESTLOOP(I2+I)
Next I
LOO = DESTLOOP2(I2) + DESTLOOP2(I2+1) + DESTLOOP2(I2+2)
rrangel@disime.com.mx
* Last updated by: Ruben on 5/24/2011 @ 5:27 PM *
The easiest way I have done this is use a Ocean Controls GWY-141 Modbus. It connects between the Vantage Pro and the Campbell data-logger. Using modbus commands you can program you data-logger to retrieve the desired values.
Dear gasman, do you have some example programs to connect using campbell logger and GWY-141, because I have both, I can connect but the data come and other format, can you help me?