Soil Moisture sensor

[mah11]

Hello everyone, 

I am trying to get a soil moisture sensor working on labview. 

http://www.dfrobot.com/index.php?route=product/product&product_id=599&search=Soil+Moisture+Sensor+%2...

It has an analog output between 0 and 4,2 v . however in the Ardunion IDE i can get values from 0 too 900 in the serial monitor. 

How can i see the same values on labview ? any ideas ?

[CoastalMaineBird]

Wild guess - the Arduino is reporting the integer counts that the A/D is providing.

If it's a 10-bit range (1024 counts), then 4.2 / 5 * 1024 = 860 - that's about your 900 count.

Simply multiply the counts by 5 / 1024 to get Volts, or multiply Volts * 1024 / 5 to get counts.

[NIquist]

Why would you even want to???  900 is just an arbitrary number like 4.2.  Just set up an indicator of your choice and scale it so it displays from 0% (dry) to 100% (soaked) and you're done.  I would use the meter indicator and make the color bar go from red to blue (or brown to green if it's for a plant).

[mah11]

Thanks 😄