Posted by Michel Trahan on 17 April 2011 - 05:26 AM in Netduino 2 (and Netduino 1)

Posted by Michel Trahan on 13 May 2011 - 02:42 PM in Netduino Plus 2 (and Netduino Plus 1)

.NET MF 4.2 (beta coming by summer) includes a new "simple storage" mechanism for storing data on-chip. We'll be embracing this in the Netduino 4.2 firmware to enable you to read/write data from your Netduino app as well.

Just to see that I understand : lets say you have a normal netduino with XBee but no SD card, you could send info to the netduino that would persist even after power recycling (like encryption key or remote ip address of neighbor sensor or ...) ? That could be interesting

Posted by Michel Trahan on 13 May 2011 - 08:27 PM in Netduino Plus 2 (and Netduino Plus 1)

Yes, you'll have 4KB or more of storage space to store data. It only has 10,000 rewrite cycles for flash rewrites...so you won't want to rewrite it frequently...but it'll be awesome for configuration data.

Quite ! specially for very small remote sensors using the mini ! Configuration yes, daily values ... not really since 10,000 cycles (about 27 years if one per day)

And of course, Netduino Plus has MicroSD support...so you can store data there easily too.

Was thinking of the mini or normal ones

Posted by Michel Trahan on 18 May 2011 - 12:09 PM in General Discussion

Posted by Michel Trahan on 20 May 2011 - 02:03 AM in General Discussion

Where are you come from Michel?...French Canada?

I do come from Montreal, province of Quebec, Canada, and a pure bastard (Irish, French, Indian(12th generation lol), and Iberville as a ancestor) (with this mixture bastard was the only appropriate one lol) and I'm proud to be

You should see my smile

And I do pronounce doo-ee-no exactly like dwee-no lol it's just a question of speed ?

Posted by Michel Trahan on 28 April 2011 - 11:24 PM in Netduino 2 (and Netduino 1)

I'll have to try this out

Posted by Michel Trahan on 30 April 2011 - 12:23 PM in General Discussion

Posted by Michel Trahan on 12 April 2011 - 01:17 PM in Netduino 2 (and Netduino 1)

Posted by Michel Trahan on 12 April 2011 - 12:41 PM in Netduino 2 (and Netduino 1)

Posted by Michel Trahan on 12 April 2011 - 12:21 PM in Netduino 2 (and Netduino 1)

There need to be two pull-up resistors connected between I2C signal lines (TWCK, TWD) and positive voltage (+5V or +3.3V depending on the devices connected). The value can vary from ~1.5 kΩ up to ~47 kΩ, 2.2 kΩ or 10 kΩ will work fine. The exact value would have to be calculated based on the bus characteristics, i.e. capacitance, number of devices connected, speed etc.

And if I see only SCL and SDA ... no TWCK nor TWD ... This is why we need a tutorial ... with some diagram using a netduino and some sensors (ex: Accelerometer ADXL345, Magnetometer HMC5843 and Gyroscope ITG3200). Real example with real sensors ...

I do understand that hardware is hard (pun intended) ... please help the newbies like me with some tutorials with real things connected, not just LEDs I am willing to help but I need input ... hard input !

Mike who wants to play with sensors without burning them !

Posted by Michel Trahan on 11 April 2011 - 10:52 PM in Netduino 2 (and Netduino 1)

It would be nice if there was a beginners tutorial on using I2C with the Netduino. Not just the code but connecting multiple devices to the bus. I know your suppose to use pull up resistors but I can't find any information on when to use them what type or how often. But a short and sweet tutorial would be great to answer these type of question us beginners have. And it would have the added benefit of being easily found.

I agree ! Beginners Tutorial Please

Posted by Michel Trahan on 01 April 2011 - 01:56 AM in Netduino 2 (and Netduino 1)

Posted by Michel Trahan on 08 May 2011 - 03:35 PM in General Discussion

You did say 16x2 so why do you set it to 16x4 in the code ? And I did it using 1K potentiometer for the brightness and it works fine

Posted by Michel Trahan on 08 May 2011 - 07:26 PM in General Discussion

Posted by Michel Trahan on 12 May 2011 - 12:30 AM in Netduino Mini

Thanks

Posted by Michel Trahan on 16 April 2011 - 01:57 PM in General Discussion

I ordered my Netduino Plus

Welcome to the community

Is there a reference document or any other resource that has the complete list of these types of functions and there parameters?

Working on it !

There is a bunch of code samples all over the place (and some in the sandbox.netduino.com) but I am working on a series of formal Tutorials (with Fritzing diagrams, documentation and code sample) and, I am also planning to get this list of functions/types available to us in the SecretLabs namespace (Chris I'll need your input for that).

It should be organized and easy to find

In the meantime, search the forums using keywords like SPI or I2C, you should find something that helps

Mike.

Posted by Michel Trahan on 16 April 2011 - 03:26 PM in General Discussion

Posted by Michel Trahan on 21 April 2011 - 11:21 AM in General Discussion

calls to native methods are blocking, so the execution engine has to wait until the native method finishes.

That made me think about how we used to do sampling of brainwaves for consciousness detection under anaesthesia. First capture data and nothing else, then massage it (cumulate to get base wave, filter the 60hz that is everywhere, etc...). Since it is blocking, does it gives you full access to the mcu ? for only one process : capture data. That would be perfect.

So, correct me if I'm wrong, native code would allow you to stop everything else (gc included?) to capture clean data (maximum time allowed ?) and then back to managed code for ease of programming and analysis. I want one

you could load FreeRTOS on your Netduino...

That would be an interesting tutorial for advanced users and what is the language used in FreeRTOS ?
I'll check, thanks for posting

Posted by Michel Trahan on 11 May 2011 - 02:29 PM in Netduino Plus 2 (and Netduino Plus 1)

NVM, used the hold button down + erase technique eventually worked.

Timing is the key

Posted by Michel Trahan on 12 May 2011 - 12:37 PM in Netduino Plus 2 (and Netduino Plus 1)

You guys are too fast lol ... I clicked on the #x and copied the url it points to And welcome to the community !

Posted by Michel Trahan on 12 May 2011 - 12:19 AM in Netduino Plus 2 (and Netduino Plus 1)

Posted by Michel Trahan on 21 April 2011 - 10:51 AM in General Discussion

Hmm - a bit on the 'content free' side?

You think ? LoL

Lots of fine looking buildings though!

Saw the inside of them a couple of years ago when doing a job interview (6 out of 7 meetings, they usually give you your office key at the 7th ... missed it by that much), and the inside is great ! You should see the cafeteria, with their own chefs (yeah read chefs, with an s) lol

But the best was that on every floor there was softdrink distributor (free that is) with every imaginable kind of softdrink

Posted by Michel Trahan on 20 May 2011 - 02:19 AM in General Discussion

Posted by Michel Trahan on 25 April 2011 - 05:33 PM in Netduino 2 (and Netduino 1)

you may take a look at the GHI's boards: they already offer something you are dreaming for!

Might have to when I start to really build the quadcopter, might need the speed ... but for now, I have to much fun here, this community is too great !

Be free and happy

Posted by Michel Trahan on 25 April 2011 - 03:37 PM in Netduino 2 (and Netduino 1)

Pity What about a netduino mega version ? speedier ARM9 with a lots of memory ? Just dreaming I know