600mL,

Thanks for the follow-up. What are you building? Curious minds want to know

Chris

I am one of those

How did you disable the Ethernet?

Good question, my temperature logger logs temperature each 30 minutes. I could make the Netduino more power efficient if turned down the Ethernet between calls. 

Interesting!

The .NET Micro Framework team (www.netmf.com, Microsoft) just unveiled a project they're working on, part of which controls a robot arm using a Netduino. Blog article: http://blogs.msdn.co...move-again.aspx YouTube Video: http://www.youtube.c...h?v=diZuR5eAY_Y Pretty cool! Chris

It's been 4 years, no more word on this?

Concerning the post topic, I think the Netduino Reboot does work, it just loses the connection with visual studio which doesn't display any more log lines in the debug window. Which, when I think of it, is perfectly logical. 

Fieuw, fixed it. I reconnected USB, like I tried before, but this time I disconnected the LAN Cable causing the DateTimeController to timeout which gave Visual Studio enough time to upload the new assemblies which solved my problem.

Good thing that DateTimeController line was still in there.

While trying to simplify the main method for testing BMP085 and the above mentioned restart problem I've uploaded some code that continiously restarts the netduino causing me to not be able to upload new code. 

Last codeset:

        public static void Main()
        {
            Debug.Print("Welcome to Netduino");
            LedController.BlinkAllLights(3, 50);
            DateTimeController.UpdateInternalClock();
            SystemController.RestartNetduino();
            while (true)
            {
                Tick(null);
                Thread.Sleep(1000 * 60 * 1); //sleep 1 minutes
            }
        }

Each time I press Start in my solution it blinks the lights and gives me the error message when "Preparing to deploy assemblies to the device. " and then displaying "Deploy failed".

Positive thing in this situation is the proof that the restart function does something at least. 

(The tick method is empty.)

Hope it's fixable, 

Tobias

Hi guys, 

I tried to use the following statement on my Netduino Plus 2 today and it didn't enter the Program Main() function after restarting. You happen to know why this is? 

            Microsoft.SPOT.Hardware.PowerState.RebootDevice(false);

The False parameter is described as 'Soft', what does this imply? 

As usual, thanks in advance!

Tobias

Hi Tobias,

Netduino Plus 2 supports the more robust hard reboot (which completely resets the micro and restarts NETMF). The soft reboot feature was useful on older boards like Netduino 1 which couldn't re-enumerate after a hard reset.

Does RebootDevice(true) work for you?

Chris

I will try that when I get back home. But still wouldn't be logical if the soft reboot did work, would it?

But normal behavior would be that the Main method gets called after reboot?

Thanks, 

Tobias

Yes! Please! Get the guys on this forum playing with Quad.net, especially if you guys have dropped this altogether. 

Hey, 

I'm a beginner in Netduino and I've bought myself the microcontroller and the BMP085 ( amongst other things)

I have no experience regarding the wiring of I2C board. Can someone help me get on my way? 

I've bought this version, so no pull up resistors are required if I understood correctly.

https://www.sparkfun.../products/11282

You can follow my progress on http://netduinoblog.wordpress.com. 

Thanks in advance, 

Tobias

Hi everyone, 

(I asked for help in the previous topic, but no reaction, probably because of the solved state of that topic? So I place it in a new one!)

I tried to take a shot at this too. I've got a Netduino Plus 2 too(   ), running NETMF4.2.
Borrowing your code I tried it like this:

   public static void NetduinoForumsMethod2()
        {
            IC_BMP085 press;
            press = new IC_BMP085(0x77);
            while (true)
            {


                var logString = "pressure: " + press.pressure + " " + "altitude: " + press.altitude.ToString("F1") + " " + "free mem: " + Debug.GC(false); Debug.Print(DateTime.Now + ": " + logString);
                Thread.Sleep(3000);
            }


        }

In the code class provided, it now crashes on 2 places.
First in the CalculateTemperature method on following line:

  x2 = mc * 2048 / (x1 + md);
                b5 = x1 + x2;


                temperature = (Single)((b5 + 8) >> 4) / 10;

  if (x1 + md == 0)
            {
                temperature = 0;
            }
            else
            {
                x2 = mc * 2048 / (x1 + md);
                b5 = x1 + x2;


                temperature = (Single)((b5 + 8) >> 4) / 10;
            }

  p = (b7 < 0x80000000 ? (b7 * 2) / b4 : (b7 / b4) * 2);

This is caused again by a divided by zero exception, where b4 is 0.

Trying to bypass I tried following code:

            

if (b4 == 0) p = 0; //It kept crashing here, /0 doesn't work.
            else p = (b7 < 0x80000000 ? (b7 * 2) / b4 : (b7 / b4) * 2);

And now it is always returning 236

 

06/01/2011 00:05:13: pressure: 236 altitude: 30344.2 free mem: 88488

06/01/2011 00:05:16: pressure: 236 altitude: 30344.2 free mem: 87744

06/01/2011 00:05:19: pressure: 236 altitude: 30344.2 free mem: 87972

06/01/2011 00:05:22: pressure: 236 altitude: 30344.2 free mem: 88716

06/01/2011 00:05:25: pressure: 236 altitude: 30344.2 free mem: 88716

06/01/2011 00:05:28: pressure: 236 altitude: 30344.2 free mem: 88488

 

Problem solving! Many crashes in code that worked with you guys.

So something wrong with my wiring? I just took some pictures of my wiring, hope it helps. 





Only mind the white wires, the other ones are for my OneWire Temperature sensor. (More here)
 

I tried the wiring schema Danger provided: 

• Sensor Pin VIn --> Netduino Pin 5V
• Sensor Pin GND --> Netduino Pin GND
• Sensor Pin SDA --> Netduino Pin SDA
• Sensor Pin SCL --> Netduino Pin SCL

But my sensor shows slightly different labels. 

I did it like this:

• Sensor VCC => NP2 5V
• Sensor GND => NP2 GND
• Sensor DA/SDA => NP2 SD
• Sensor CL/SCL => NP2 SC

 

Any thing else I could have screwed up? 

 

Thanks in advance!

I tried the 100 Khz setting, tried different addresses, tried creating a new solution with a simple setup to test the I2C communication.

However still bumping into errors.
This time it fails on the initialization of I2CDevice class in the MultiI2C base class. 

I created a rar file with the solution in it, don't know if it'll help. 

Download : http://bit.ly/SwLUGY

Sigh!

Hi tobiasv,

At first glance, your wiring looks alright. The pull-ups are 4.7K (and you have shorted the solder jumper on the breakout...so they should be working as pull-ups). That's a little higher value than we like, but it should work with the 5V supply.

Have you tried using a slower I2C speed?

Also...what line of code in the project does this crash on, exactly? If we can reduce this down a simpler sample, we may be able to help out from this side.

Chris

I'm not able to test the slower I2C Speed atm, not sure how to, even if I could. .

But I do know it now crashes in the IC_BMP085 Class in the method CalculateTemperature() on the following line: 

x2 = mc * 2048 / (x1 + md);

You don't seem to have any pullup resisters on the I2C bus. Could that be the issue?

I believe they are already on the BMP085 Sensor, you can see them on the picture. Unless I'm completely mistaken?

Hi tobiasv,

At first glance, your wiring looks alright. The pull-ups are 4.7K (and you have shorted the solder jumper on the breakout...so they should be working as pull-ups). That's a little higher value than we like, but it should work with the 5V supply.

Have you tried using a slower I2C speed?

Also...what line of code in the project does this crash on, exactly? If we can reduce this down a simpler sample, we may be able to help out from this side.

Chris

Is this the I2C speed setting ? 

 public IC_BMP085(Byte Address, int speed = 400)
            : base(new I2CDevice.Configuration(Address, speed)) // maybe 400khz
        {
            Thread updateThread = new Thread(Update);
            updateThread.Priority = ThreadPriority.Lowest;
            updateThread.Start();
        }

public IC_BMP085(Byte Address)
            : base(new I2CDevice.Configuration(Address, 400)) // maybe 400khz
        {
            Thread updateThread = new Thread(Update);
            updateThread.Priority = ThreadPriority.Lowest;
            updateThread.Start();
        }

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);
} 

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

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/

Your blog looks very interesting, I've done a bit of work with temperature/humidity myself, so I look forward to seeing what you come up with!

 

I noticed that a while ago you were having trouble with your I²C pressure sensor, I'm no expert, but if you're still having problems let me know and we can try to work it out.

 

Keep up the excellent work!

I have 2 I2C sensors ready to be implemented. However I need to solder them to make them work I guess. Not getting much results with just sticking the pins in the holes . 

So first thing is to buy me a soldering pen. 

I'll keep the blog up to date!

Hi Chris, 

Sorry but I'm not following. If I click on the link to the post, it just works. 

http://forums.netdui...fun-bmp085-i2c/

Should I repost entire thread? 

Tobias

Thanks for sharing, Tobias. How was the integration with ThingSpeak? Pretty simple?

Chris

Using the uPLibrary from CodePlex, SUPER simple . Like you see in my code. 

Have you had the time to look at my I2C Sensor problem again? http://forums.netdui...fun-bmp085-i2c/

Thanks!

Added article about implementation of a webserver on my NP2. http://netduinoblog.wordpress.com

I'm new to Netduino and this is my first project  

It should become a temperature, barometric & humidity logger, but I'm not there yet. 

See my progress at 

http://netduinoblog.wordpress.com

What do you guys think?

Added article about a simple implementation of ThingSpeak publishing & results. http://netduinoblog.wordpress.com

Hi everyone, 

I 've read articles where people have connected an old Nokia Phone screen to Arduino http://www.instructa...okia-Color-LCD/. I was wondering if anyone has tried this with the screen of an old Android phone. I have a broken Sony Ericsson Xperia X10 lying around, wondering if I could put it to some use. 

Kind regards, 

Tobias