Hi there,

 

I am going to use software Watchdog to reboot my Netduino after a constant time. I know it is a simple question, but may I ask your help to do it?

The code that I developed is like that, but it doesn't work:

using System;using System.Net;using System.Net.Sockets;using System.Threading;using Microsoft.SPOT;using Microsoft.SPOT.Hardware;using SecretLabs.NETMF.Hardware;using SecretLabs.NETMF.Hardware.NetduinoPlus;namespace NetduinoPlusApplication1{    public class Program    {        public static void Main()        {            bool error = true;            Watchdog.Timeout = new TimeSpan(0, 1, 0);       //Timeout = 1 minute.            Watchdog.Enabled = true;            Debug.Print(Watchdog.Timeout.ToString());            while (error)            {                Debug.Print("There is a systematic error, so the system needs to reboot");                Thread.Sleep(2000);            }        }    }}

and the  Debug.Print(Watchdog.Timeout.ToString()); prints "00:00:00".

 

Thanks in advance,

Mohammad

First of all, the watchdog functionality is not there in the stock firmware. All the interfaces are there, but no functionality.

 

If you would want to use the firmware I built, look at this message, it has a code sample: http://forums.netdui...ge-2#entry47334

 

Hi ToniA,

 

Thanks for your reply. It is a bit rediculous that the interfaces and methods are available, but they are fake

Anyway, I gave up to use watchdog for now, but I will surely use your firmware someday.

Hi all,

 

My "network die problem" was solved after spending 2 months on it Now, I am so happy. The solution I used was software watchdog developed by my own. If you are interested in the solution, take a look at this link: http://forums.netdui...lus/#entry49735

I will later publish a post to elaborate the whole procedures and solutions that were useless except the software watchdog.

 

Good luck

Hi Chris, Thanks for your useful reply. Cheers, Mohammad

Hi all, Is there any way for Netduino to understand its input voltage value? Cheers, Mohammad

Hi Chris,

 

Thank you so much for your reply and your attention.

The line I get those exceptions is this one:

mem = new FileStream(path, FileMode.Append, FileAccess.Write, FileShare.None, 512);

In addition, I didn't try it with any lower-capacity card.

 

Cheers,

Mohammad

 

 

Hi all,

 

The problem was solved by Micro SD 2GB. It seems the Firmware 4.2.0.X doesn't know the Mirco SD 4GB and up.

Hi Chris,

 

Thank you so much for your reply and your attention.

The line I get those exceptions is this one:

mem = new FileStream(path, FileMode.Append, FileAccess.Write, FileShare.None, 512);

In addition, I didn't try it with any lower-capacity card.

 

Cheers,

Mohammad

 

Hi all,

 

I upgraded the firmware of my Netduino Plus from 4.1.0.6 to the new firmware introduced in this thread.

Now, I am writing something on a 4GB MicroSD, but I faced with the following errors. Would you please help me solve this problem?

 

My Code:

using System;using System.IO;using Microsoft.SPOT.IO;using System.Net;using System.Net.Sockets;using System.Threading;using Microsoft.SPOT;using Microsoft.SPOT.Hardware;using SecretLabs.NETMF.Hardware;using SecretLabs.NETMF.Hardware.NetduinoPlus;namespace NetduinoPlusApplication1{    public class Program    {        static string path = "SDSWEIoT.log";        public static FileStream mem;        public static void Main()        {            try            {                mem = new FileStream(path, FileMode.Append, FileAccess.Write, FileShare.None, 512);            }            catch (Exception e)            {                Debug.Print(e.ToString());            }        }    }}

 

The received exceptions:

A first chance exception of type 'System.NotSupportedException' occurred in Microsoft.SPOT.IO.dllA first chance exception of type 'System.NotSupportedException' occurred in System.IO.dllSystem.NotSupportedException

 

Thanks in advance,

Mohammad

Hi all,

No updates yet for Netduino Plus firmware to support Micro SD 4GB?

I developed a program for Netduino Plus to work (read/write) with Micro SD 4GB.
This program worked perfect with firmware v4.1.1 betta, but after upgrading to firmware v4.2.0 RC4, I got these errors:

A first chance exception of type 'System.NotSupportedException' occurred in Microsoft.SPOT.IO.dll
A first chance exception of type 'System.NotSupportedException' occurred in System.IO.dll
System.NotSupportedException

Would you please help me solve this problem?

Special Thanks,
Mohammad

If you experience bugs with the .NET MF 4.2 RC5 firmware, please post about it in this thread.

Hi all,

I developed a program for Netduino Plus to work (read/write) with Micro SD 4GB.
This program worked perfect with firmware v4.1.1 betta, but after upgrading to firmware v4.2.0 RC4, I got these errors:

A first chance exception of type 'System.NotSupportedException' occurred in Microsoft.SPOT.IO.dll
A first chance exception of type 'System.NotSupportedException' occurred in System.IO.dll
System.NotSupportedException

Would you please help me solve this problem?

Special Thanks,
Mohammad

Hi all, My Netduino Plus is a Web server. When it receives any packet, it reads the the packet length from its header. Then, Netduino drops it. My question is how Netduino can receive the packets with length larger than its RAM capacity (28KB). I could send packets larger than 80KB and Netduino could read their headers. Any reply is appreciated. Thanks, Mohammad

Hi Chris,

Thanks for your reply.
I sent chunks of data around 80KB. My assumption: chunks of data = TCP/IP packets. Am I wrong?
I know that MTU for Ethernet only allows 1.5KB of data to transfer. So, the TCP packets should be fragmented on router, then send to Netduino.

And the rest of the data should be "held back" until your Netduino Plus has enough room in its buffers to receive it.

My understanding from your reply is in this way:
- 80KB data are sent to Netduino. Netduino can read the header, but it cannot read the whole content. When it empties its memory, the pending contents can be loaded in Netduino. Yes?

Thanks again,
Mohammad

This link might be useful to reboot the Netduino Plus by software http://forums.netdui...lus/#entry49735

 

Good Luck,

Mohammad

Hello Dave,

 

I really appreciate you. I read some threads, but none of them couldn't solve my problem.

 

Cheers,

Mohammad

Could you show us your code and circuit so we can diagnose the issue?

 

Hi Verdis,

 

Here is my code which is now working properly:

using System;using Microsoft.SPOT;using Microsoft.SPOT.Hardware;using SecretLabs.NETMF.Hardware;using SecretLabs.NETMF.Hardware.NetduinoPlus;namespace SWEIoT{    public class Sensor:Constants    {        AnalogInput voltagePort;        OutputPort lowPort, highPort;        public Sensor()        {            //Temperature senso           voltagePort = new AnalogInput(AnalogChannels.ANALOG_PIN_A1);           lowPort = new OutputPort(Pins.GPIO_PIN_A0, false);           highPort = new OutputPort(Pins.GPIO_PIN_A2, true);        }        public double read()        {            double rawValue = voltagePort.ReadRaw();            double value = (rawValue * maxVoltage) / maxAdcValue;            double result = (((value - 0.5) * 1000) / 10) - 4;            return result;        }    }}

 

Thanks for your concern,

Mohammad

 

This might be useful for your watchdog prodecures: http://forums.netdui...-netduino-plus/ (although it is a software reboot).

Latest version is much more stable, thanks ToniA!

 

Unfortunately my SD Card that worked fine in 4.1, doesn't work in 4.2

Throws the Unsupported Exception in System.IO

 

Is your SD card more than 2GB? The firmware 4.2 only knows the SD cards 2GB and 1GB.

That's not a watchdog, it's a scheduled reboot.

 You are right, so I should not consider them interchangeably.

 

have you tried out my firmware build?

No, since the firmware of your library was different from mine.

 

 

What are the problems you mention in the other thread ('I had a problem for 1 month to use a Watchdog mechanism in Netduino Plus') ?

The watchdog problem to reboot the Netduino Plus after a specific time.

According to the comments on the Sparkfun page https://www.sparkfun.com/products/9964, [color=#008000;]I could solve the problem[/color]. Somebody recommended to write a tight loop (e.g. 100ms) to get the min and max values. The difference between the two will give us the volume (sound pressure) during that time.

Hi,

 

Is there anyone who has already worked with Electret Micrphone Sensor? I need to detect the noise in my room, so I wired the sensor simply to my Netduino Plus (5v, GND, Analog Pin 0), and I am getting random values (70 to 130) which are independent to the existing noise.

 

-My code:

    public class Program    {        public static void Main()        {            SecretLabs.NETMF.Hardware.AnalogInput inp = new SecretLabs.NETMF.Hardware.AnalogInput(Pins.GPIO_PIN_A0);                        while(true)            {                Debug.Print(inp.Read().ToString());                Thread.Sleep(100);            }            }    }

The best blog to solve the problem: http://mohammad.geoc...ebsite/blog.php

The best solution to solve the problem: http://mohammad.geoc...ebsite/blog.php

Hi Chris,

 

Thank you so much for your quick reply, but I didn't understand what I should dispose.

For your information, I deleted that project, and copied and created a new one. The new code worked properly once For the second time, it threw the exception. It seems it restores a file or attribute in the project folder.

 

Cheers,

Mohammad

Hi All,   I developed a code to get the temperature readings from TMP36 sensor. My Netduino was working properly. After 5 hours, I started debugging again, but it throwed exceptions (on the line voltagePort = new SecretLabs.NETMF.Hardware.AnalogInput(Pins.GPIO_PIN_A1)):

A first chance exception of type 'System.ArgumentException' occurred in Microsoft.SPOT.Hardware.dllAn unhandled exception of type 'System.ArgumentException' occurred in Microsoft.SPOT.Hardware.dll

The code of mine is here:

using System;using Microsoft.SPOT;using Microsoft.SPOT.Hardware;using SecretLabs.NETMF.Hardware;using SecretLabs.NETMF.Hardware.NetduinoPlus;namespace TMPSensor{    public class Sensor:Constants    {        //Microsoft.SPOT.Hardware.AnalogInput voltagePort;        SecretLabs.NETMF.Hardware.AnalogInput voltagePort;        OutputPort lowPort, highPort;        public Sensor()        {            //Temperature sensor           //voltagePort = new AnalogInput(AnalogChannels.ANALOG_PIN_A1);           voltagePort = new SecretLabs.NETMF.Hardware.AnalogInput(Pins.GPIO_PIN_A1);           lowPort = new OutputPort(Pins.GPIO_PIN_A0, false);           highPort = new OutputPort(Pins.GPIO_PIN_A2, true);        }        public double read()        {            double rawValue = voltagePort.Read();            double value = (rawValue * maxVoltage) / maxAdcValue;            double result = (((value - 0.5) * 1000) / 10) - 4;            return result;        }    }}

The firmware of my Netduino Plus is 4.2.0.0 (RC5), and the SDK is MicroFrameworkSDK_NETMF42_QFE2. Any help or comment is highly appreciated.   Mohammad

FYI. I copy and paste the code from my notebook to PC. The only diff between my notebook and PC is about the SDK version (I am not sure whether it matters). As long as the code hasn't been changed (e.g. type a character which needs a new software build), the code works properly. Whenever I change the code and build it again, the errors appear.