Hey Mario and CW2,

Thanks for responding to the post, and I've figured out that the DHT-22 uses a weird 1 wire protocol, and that the lack of precision with the .NET framework is going to be a deal breaker. So I would recommend avoiding this sensor despite it's alluring price.

Therefore, I have decided to go with an analog approach. I've decided that dealing with an analog voltage signal should be much easier than trying to decode some strange 1-wire protocol or do any kind of bit hacking which is way over my head at this point.

So, I've ordered a new set of sensors. I have purchased a 10K thermistor, the SEN - 00250 to be exact. I have also purchased a humidity sensor in the form of a HIH-4030 Breakout Board. I'm planning on reading the 10K thermistor using a simple voltage divider with another 10K resistor. I'm hoping that will give me the right voltage range and close enough accuracy for measuring temperature +/- a few degrees F.


I'll let you know when I get everything set up.

I've been working on the program to interface with the DHT22 sensor, and I have based it off of the code written for the arduino at the website below.

http://sheepdogguide...ne1humDHT11.htm

I've had a friend write a stopwatch class to handle the microsecond delays required, and the rest I've tried to piece together based on the arduino code. I've had trouble writing anything that will print out the values from the sensor, so if anyone can give me some help there I would really appreciate that.

Other than that I hope this is helpful, and I would appreciate any and all feedback.

 DHT 22.zip   53.08KB   27 downloads

So, I'm trying to read data off of the DHT22 Temperature and Relative Humidity Sensor. I've found code written for the Arduino but, I have an extremely limited knowledge of C# and Visual Basic. I am wondering if anyone wants to take a look at the code for the Arduino and help translate that to a C# file for me. I have had a very basic introduction to C++ but not a working knowledge of it, and I am brand new to C# so any explanation and translation of the code I've attached would be extremely helpful.

Hi all,

This is all very new to me, but the potential for micro-controller as compact and inexpensive as the netduino seems infinite.

I intend to utilize the netduino in controlling the temperature and relative humidity of a small greenhouse or terrarium. As of right now I have ordered a temperature and relative humidity sensor as well as two relay control boards for the control of the heater and humidifier.

I intend to write a controls logic to automate the process as well as log data from it. I may need a good amount of help when it comes to this part. This is my first netduino project aside from onboard led fun. I'm sure I'll have plenty of questions once I start piecing this project together.

Any thoughts and suggestions are more than welcome.