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Member Since 26 Nov 2010
Offline Last Active Feb 09 2016 09:27 AM

Topics I've Started


09 July 2013 - 06:42 AM

Bit of a newbie question again.


I'm outputting the result of Debug.GC occasionally.

I'm running a plain Netduino 2 (which allegedly has 60K of RAM according to the tech specs on the site) but Debug.GC reports around 71000 bytes with my current (medium sized) application running  :huh:


Is there something blatantly obvious that I'm missing?  :huh:


Thanks, Dennis

SD Card and other SPI devices

03 July 2013 - 07:41 AM

Hi all,


Bit of a newbie question on SD cards and SPI.


I have an SD Card shield which works brilliantly.

Mount the SD, read/write, unmount. All good.


But how would I go about attaching other devices to the SPI bus?


In theory the netmf toolbox MultiSPI would suit me well but the SD card is not a normal SPI configuration from what i can see (you pass slave select pin and spi device in mountSD not through a normal SPI config). So how would I switch SPI configs?


Anyone ever dealt with this?




VS2012, 4.3SDK and NETMF Toolbox

30 June 2013 - 04:31 PM



I'm using VS2012 on Win8 Pro. I'm developing on a Netduino 2 with 4.2 firmware.

Hence I'm targetting .NET Micro Framework 4.2 in Visual Studio and using assemblies from the v4.2 of Netduino SDK and similarly for the NETMF toolbox.


If I add references to Toolbox.NETMF.Hardware.Netduino, when I try to debug I'm getting the following error:


Link failure: some assembly references cannot be resolved!!
Assembly: Toolbox.NETMF.Hardware.Netduino ( needs assembly 'SecretLabs.NETMF.Hardware.PWM' (
Assembly: Toolbox.NETMF.Hardware.Netduino ( needs assembly 'SecretLabs.NETMF.Hardware.AnalogInput' (
Error: a3000000
Thing is, I cannot find any SecretLabs assembly
The ones in my Secretlabs v4.2 folder are all version and the ones in the v4.3 folder are
Any idea?

Weird problem powering up GSM shield

26 May 2013 - 05:18 PM

Hi all, 


Really stumped on this one. Ran out of ideas.

I'm using an IComSat v1.1 GSM shield on a plain vanilla Netduino 1 and all is working fine. The only problem is powering up the SIM900 module. This version of the shield allows software powering up, by writing pin 9 HIGH for a short interval.


If I use visual studio, press F5 to start debugging (without any breakpoints whatsoever), it all works fantastic. Turn on and turn off both work flawlessly.


If I then stop the debugger, remove the USB cable, and power the Netduino independently, power up doesn't happen. I tried flashing the netduino LED to make sure I'm passing through that bit of code and sure enough it flashes while sending the power up pulse to pin 9, but the shield doesn't turn on. Pressing the actual physical power button on the shield instantly turns the shield on.


Connect the USB cable and run via F5 again and everything works perfectly via software.


I tried everything from waiting 10 seconds after powerup before turning on the shield, to implementing a retry mechanism every 10 seconds. I sent 10 power up pulses 10 seconds apart... a total of almost 2 minutes. Shield still didn't power up.


What does running through Visual Studio debugger do differently to running on a 12V 2A power supply?

Really giving up on this :(


Anyone has any ideas before I whip out the soldering iron and use a relay in parallel with the shield's physical power button controlled via the netduino?


Thanks and Regards,


Getting started on new PC

01 January 2013 - 11:52 AM

Hi all,


I have a plain vanilla original Netduino. I used to program my netduino using an old WinXP machine with NETMF 4.1 and VS2010. It has never had the firmware updated.


Well, time has come to use the Netduino for something else. Thing is now I have a Win8 Pro 64-bit machine with VS2012 Ultimate. I still don't have NETMF or Netduino SDK installed.


While we're at it I would like to upgrade the firmware too.


So what's the best way to go about it? Should I use NETMF 4.2 to flash the firmware to v4.2 and use Netduino SDK 4.2?

Or could I use NETMF 4.3 straight away?

I've read the guide about upgrading to 4.2 but not sure if Win8 and NETMF 4.3 will do the job correctly too.


Thanks and Best Regards,


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