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The Netduino forums have been replaced by new forums at community.wildernesslabs.co.
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Michel Trahan's ContentThere have been 155 items by Michel Trahan (Search limited from 17-June 23) #13279 Quadcopter Early Flight
Yes you need it when you don't know C or C++ and only know Visual Studio as a compiler
![]() ![]() #13264 Quadcopter Early Flight
I know lol and that is why i have a 200MHz .Net MF waiting for me to get up to speed with coding sensors to try it out
![]() #11587 Anybody interested in a cheap IMU?
Any left ?
Mike.
#12161 Anybody interested in a cheap IMU?
Any updates ?
#11597 Anybody interested in a cheap IMU?
Still new at all this but thinking of buying a couple of sensors to play with to understand what is at stake ... I liked the idea of having a 9dof sensor
![]() #13614 Anybody interested in a cheap IMU?
Do you need something more from me ![]() #12986 Sleep In Microseconds
Sorry, I missread it ... #12981 Sleep In Microseconds
Welcome to the community
![]() ![]() #13233 How to manual read/write internal flash?
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 ![]() #13250 How to manual read/write internal flash?
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)
Was thinking of the mini or normal ones ![]() #12927 Netduino Tutorial - Multithreading (Methods with Parameters)
Just leaving a breadcrum to remember
![]() #11969 I2C Where do I start
I agree ! Beginners Tutorial Please ![]() #11999 I2C Where do I start
LOL It made my point clear though ! LOL Did I understand correctly, you ALWAYS need pullup resistors ? or only when there is more than one sensor connected to it ? And using a I2CBus class to encapsulate all this would be nice to have (to clean up the code) ? #11995 I2C Where do I start
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 ![]() Mike who wants to play with sensors without burning them ! #12010 I2C Where do I start
Boy do we need a tutorial LOL Sorry, my lack of knowledge ... I didn't know why it was created ! Thanks ! #12660 Simple multi-threaded web server
How do we discriminate the request received ? Where is the command string ? Where are the arguments ... needed ... I find the other one easier to use ... you declare actions, you switch between the ones you defined ... How do you know which command to call ? Or I missed the whole point #11786 Simple multi-threaded web server
Imagine a series of netduino mini (as thermostat) using XBee to communicate with a router, then imagine a base station (or multiple with touch screens) that can send command to all the other "sensors" through the router ... you could have all the thermostats in the house connected to a router and a series of control panels also connected to the router and have the computer send preprogrammed sequence to all ... you could even change settings from the office using the internet ![]() Very good work Jasper ! Thanks ! #12746 Simple multi-threaded web server
I was asking about how do you discriminate which action to take in your main function on the netduino ... I know that the worker has the code to do the actions ... but how do we test which command was asked to the webserver ? If you only send one command, why do all that structure lol
#12983 ADC Reading wrong?
I found that it takes about 10 seconds for the values to stabilize Could it be that the current heats things up and it takes a while for everything to stabilize ? #12987 ADC Reading wrong?
I looked at it using http://api.thingspea...ls/637/charts/2 and it looks relatively stable ... have you tried to see the average over a couple of readings to eliminate the jitter ?
#12991 ADC Reading wrong?
Indeed, it was stable when powered by an external 9V #12483 Best way to convert string to number
using System;
ActualReading = Convert.ToUInt16(sActualReading);
#12594 Double prescision math lib?
I don't have a netduino plus yet nor do I have a ethernet shield but yes, this is exactly what I'm looking for as a frame for this mathematical tutorial ! That would be a great start ! I could probably do the missing code even without ethernet connection (using debug.print lol). YES ME WANT ![]() Put it in a new project showcase and I'll grab it from there ! Or in the wiki ? Your choice ! Boy do I love this community ! #12592 Double prescision math lib?
To show the results on a PC ... live ! And the timestamp would mark the begining and end of the call on the netduino to the math function (for the netduino values). The webserver would receive a function to test and a series of values to use. For each value to test the function with, a timestamp is used to calculate the number of ticks needed to execute it (some input values might take longer to calculate the output than others). It would reply with a table of data to display on the PC side by side the PC calculated equivalent sent to the netduino to compare ![]() We could even show the values graphically (I do need to learn how to do that too, lol) #12588 Double prescision math lib?
I propose to build a tutorial that would have a good side effect : show the differences between the math libraries on the netduino and the ones on the PC. It would do many simple things : 1- show how to create a web server on the netduino (a sample already exist so we can use that) 2- show how to interact with that web server from a pc (the sample does already show that) 3- show the simplest form of table data display on the pc (i need to learn how to do that) 4- show how to timestamp data results to get processing time on the netduino and on the pc (I also need to learn that) 5- show what math functions are available on the netduino and 6- show the induced errors of those functions in certain input value ranges (needed when doing complex mathematical algorithm) on the netduino 7- show the time cost of using certain mathematical functions with certain input value ranges Anyone interested in using the complex mathematical functions on the netduino should be made aware of the induced errors with certain input ranges of some functions and the time cost of using those functions in their netduino application. That is the goal I want to attain. Inform of the errors and cost of each mathematical functions available on the netduino, and teach a thing or two while doing it (like tabular data display on the PC) !
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