Netduino home hardware projects downloads community

Jump to content

The Netduino forums have been replaced by new forums at This site has been preserved for archival purposes only and the ability to make new accounts or posts has been turned off.

Daniel Minnaar

Member Since 01 Oct 2011
Offline Last Active Apr 01 2014 08:38 AM

Topics I've Started

Need help rewriting some WiFly logic: Decent payment!

15 November 2013 - 12:27 PM



We're in desperate need of someone who'd be willing to rewrite code for the WiFly RN-XV module. What we're using just isn't working reliably and we've already sold it to the client.


We're willing to pay between US$1000 - US$1500 for the help, depending on how quickly you can do it. We're looking at between 1-2 weeks.


All we're trying to do is scan networks, connect to the strongest AP and post some data to a webpage (which has already been developed).


We're using the netmftoolbox framework for the WiFlyGSX model but we've hacked it to get it to do what we want, but unfortunately we're obviously doing something wrong. Problems being experienced includes sudden unresponsiveness from the module (which looks like a communication issue) and serial exceptions left right and center. The idea is to just re-write a simplified version of what we need it to do and thats it.


Any takers? This is really urgent. If you can do it after hours thats fine, as long as we meet deadlines.



Extending (eeprom) memory on ND+2

24 May 2013 - 11:36 AM



What options are available to store data besides the SD card? Is it possible to hook up an extra eeprom to the ND2+ to access and write to it's memory?


The data will most likely be hour meters or something simple, so in other words I don't expect to use it as a buffer stream or something that i write to constantly.


Any (tried and tested) ideas would be great! Thanks

RFID Reader/Write (13.56khz - Mifare) on Netduino

08 May 2013 - 08:14 AM

Hi there,


After using the 125khz readers on the Netduino, I decided I want to write data to the tag, which forces me to use 13.56khz tags (Mifare) and appropriate reader/writers.


Initially I bought a NFC shield, which was a disaster because I couldn't get the SPI driver to work with Netduino. I've read multiple threads about it and no-one has been able to get it right with a Netduino. So I decided to get a new reader/writer using UART comms instead.


The problem is that the UART commands are all in hexadecimal format and I don't have much experience working with hex conversion into bytes to send over UART...



So a few questions before I start:


    [*]If I wanted to send 0x01 as a command to search for cards, could I simply do this? serialPort.Write(Text.Encoding.UTF8.GetBytes("0x01"), 0, theLength);
    [*]If I needed to encode something as hex, such as string or number (i.e "Hello World", or "12345"), how do I do this? Is there a library or method extension out there I can use to convert it?
    [*]At a first glance, would this reader/writer work with the Netduino 2? I see it uses a 4-pin wire, but I can just put in some solder wire tips and connect it to the headers: http://www.elechouse...roducts_id=2156
    [*]If I have 1k space on the Mifare Card, how can I calculate how much space "Helllo World" or "123456" would take in hex format on the card? I'll have a few variables i want to push into the card so I need to make sure it will all fit.


    I'd REALLY appreciate some help, it's for a project at work and I need to make sure of my facts. Thanks a ton!

Home Security System - Need help with some considerations

04 April 2013 - 07:13 PM



Since I reside in South Africa, personal security is a big concern. I've decided to rather spend $500 on a Netduino solution instead of paying a monthly fee of $50 to a security company. I'm now in the design phase, so I'm considering the various challenges and requirements ahead.


So far I've identified the following requirements:

  • Indoor motion sensors for each room (3-4 rooms)
  • A loud speaker in the ceiling
  • A bright alarm light outside
  • An activation/deactivation interface

I live in a cul-de-sac - I'm very well acquainted with all my neighbors and we're always on the look out for each other. My idea behind this system is not so much armed response but more of a 'scare away' tactical approach. I suspect the audible alarm and visual light will be sufficient enough to deter intruders.


When I consider that the motion sensors use analogue signals, the first challenge I can identify is the distance between all the sensors and the central Netduino. I would guess the average distance between each sensor to the Netduino would be around 15 meters. I can only imagine that I'd suffer from noise and loss of signal issues between the sensors to the Netduino.


I've considered using an XBEE approach, but what other alternatives are there?


As for the siren and light, I'll just use external power with a relay to get them going.


Is there anything I've overlooked here? I've got a bunch of nice toys lying around such as the Nwazet Go kit with touch screen, a GPRS shield, couple of Netduinos, sensors etc.


Where to now? :)





P.S: I've got a Kinect, and some exposure playing around with the SDK, could this influence my decision? Hmmm...

home    hardware    projects    downloads    community    where to buy    contact Copyright © 2016 Wilderness Labs Inc.  |  Legal   |   CC BY-SA
This webpage is licensed under a Creative Commons Attribution-ShareAlike License.