Displaying null serial data

[CraigTerris]

Null serial data is streaming through the Com. Monitor as below. I need to display the variable values

Dn={everything up to the next comma}, Sm={up to the comma} and Sx={up to the comma} as three different values

Dn=wind direction, Sm=Nominal wind speed, Sx=Maximum wind speed, all from a Vaisala wind instrument.

There are a few examples I have read, but I still can't quite get my head around it.

These values will be displayed individually and Sx= will trigger an email alert

can you give me a few pointers please.

Rx: 0R5,Th=15.3C,Vh=0.0#,Vs=14.1V,Vr=3.504V130010

Rx: 0R1,Dn=255D,Dm=255D,Dx=255D,Sn=4.6N,Sm=4.8N,Sx=5.0N130010

Rx: 0R1,Dn=254D,Dm=255D,Dx=255D,Sn=4.7N,Sm=4.8N,Sx=4.9N130010

Rx: 0R1,Dn=253D,Dm=254D,Dx=255D,Sn=4.5N,Sm=4.7N,Sx=4.9N130010

Rx: 0R5,Th=15.2C,Vh=0.0#,Vs=14.0V,Vr=3.506V130010

Rx: 0R1,Dn=251D,Dm=252D,Dx=253D,Sn=4.4N,Sm=4.7N,Sx=4.9N130010

Rx: 0R1,Dn=250D,Dm=251D,Dx=252D,Sn=4.5N,Sm=4.6N,Sx=4.8N130010

Rx: 0R5,Th=15.7C,Vh=0.0#,Vs=14.0V,Vr=3.506V130010

[AzeoTech]

First, there isn't any "null" serial data. Its actually just an ASCII stream. But that's just semantics I'm not sure where you are getting stuck. I'm assuming in the parsing. The easiest way to parse things of the general "x=9999" nature is to parse on the equal sign then let the strtodouble() function strip the units off. So, assuming you have a string variable named "datain" with the Rx string, you'd do something like:

private string parsedData = parse(datain, -1, "=")

With -1 it will return an array of strings. So, if datain had:

0R1,Dn=254D,Dm=255D,Dx=255D,Sn=4.7N,Sm=4.8N,Sx=4.9N

you'd get:

{"0R1,Dn", "254D,Dm", "255D,Dx", "255D,Sn", "4.7N,Sm", "4.8N,Sx", "4.9N130010"}

So, parseData[1] = "245D,Dm" which is the Dn value, so Dn = strToDouble(parseData[1])

Then you can just use addvalue() on a channel to add the result:

Dn.AddValue(strToDouble(parseData[1]))