5 replies to this topic

[fredk]

I've just received my Netduino plus 2 with bits 'n bobs, one of them being a onewire temperature sensor.  I'm now trying to figure out what all I need software wise to get it going.

 

I'm locked in to 4.2 firmware because the laptop my son and I are using is Vista and only supports Visula C# 2010.

 

From looking at the MS reference for its 4.2 Micro Framework I understand that onewire support is "provided through a community development effort.".  I'm guessing that I need additional code/libraries/classes but am not clear on exactly what it is I need. I've downloaded two bits of code, DS18B20.cs and OneWireBus.cs, that were used by someone else in their project.  Should I be using these? Are their any other code bits I need? 

 

Also, do I need flash memory installed to load said code?

 

Thanks in advance

[Tobias Vandenbempt]

I've done this very thing, and have a blog post about it. Maybe it will help you? 

 

http://netduinoblog.Wordpress.com

https://netduinoblog...sensor-ds18b20/

[fredk]

Thanks for the reply Tobias.  That is a very well laid out blog and one of the links I found when searching on the subject.

 

Maybe a little more background will be helpful.  I am a non-programmer with a technical marketing background (know just enough to be dangerous ) and the guy doing the coding, my son, has only used Python (highschool level programming).  This is an opportunity for him to tackle a real world project using a mainstream language.  So, both of us are stumbling around a bit here.

 

For the classes you have used (linked to in your blog) is there some documentation laying out the methods and properties available for them?  Neither my son or I are going to be very good at figuring this stuff out on our own just stepping through the code.

[Tobias Vandenbempt]

You can just copy my Controller code to a class and then use that class as follows:

 

private static OneWireTemperatureSensorController _tempertureController;
public static void Main()
{
_tempertureController = new OneWireTemperatureSensorController(Pins.GPIO_PIN_D0);
     while (true)
     {
                Tick(null);
                //Thread.Sleep(10 * 1000 ); //sleep 10 seconds
                Thread.Sleep(1000 * 60 * 30); //sleep 30 minutes
     }
}


private static void Tick(object state)
{
    var temp = _tempertureController.ReadTemperatureToConsole(TemperatureEnum.Celcius, false);
} 

The temperature then gets logged to your Console window, so there you will see the temperature readings. 

 

Hope this is easy to read, if not ask away!

[fredk]

Well, that would work to get the sensor going.  The code bit you posted makes sense to me.  Hmm.  This will work as a temporary solution until we get a better handle on c# and netmf.

 

I guess the other option is to upgrade my son's laptop to windows 7/8 and work with netmf 4.3  Looking at the Microsoft site for it there appears to be a onewire class.

 

Thanks for your help.

[Tobias Vandenbempt]

Of course the wiring is important as well(don't forget the resistor!) but I think it's clear on the image.

 

If it doesn't work, or it does. Let us know  

Good luck