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There have been 9 items by WahidM (Search limited from 28-September 23)
#23057 RFID Reader
Posted by WahidM on 20 January 2012 - 03:06 PM in General Discussion
#24674 RS232 Shield Not receiving data
Posted by WahidM on 25 February 2012 - 10:22 AM in Netduino 2 (and Netduino 1)
... and try the same thing at the Netduino. Disconnect the RS232 break out board, and then connect D0 to D1.
That will allow you to verify the Netduino's serial code.
Sorry for the late reply on this.
I swapped over the PINS and it seems the netduino isnt receiving any data, although the TX light flashes on the serial shield to indicate activity. Could this be something to do with my Netduino?
#22938 RS232 Shield Not receiving data
Posted by WahidM on 18 January 2012 - 01:52 PM in Netduino 2 (and Netduino 1)
#22924 RS232 Shield Not receiving data
Posted by WahidM on 18 January 2012 - 10:01 AM in Netduino 2 (and Netduino 1)
#24232 How to use COM1 and COM2 together
Posted by WahidM on 14 February 2012 - 03:05 PM in General Discussion
#22655 Open Door Lock
Posted by WahidM on 10 January 2012 - 01:24 PM in General Discussion
#22702 Open Door Lock
Posted by WahidM on 11 January 2012 - 04:33 PM in General Discussion
A serial RS232 shield could be this one, although you may find similar devices anywhere.
About the lock, I cannot help you. I guess that should be a component sold by the doors manufactures, or specialized markets.
However, you may ask of a electric-driven lock, *preferably* using low voltages (i.e. under 24V), and DC.
Tell me more.
Cheers
Thanks for the link, I will add the RS232 sheild to my list. I think your right about the electric-driven lock. I need a fail-sucure electric strike which I beleive can come with monitoring. I just need to get this wired into the board.
#22703 Open Door Lock
Posted by WahidM on 11 January 2012 - 04:35 PM in General Discussion
There are many ways to see when the door has closed. Does the mag lock your using provide an output which toggles high/low when the door is closed/open? If so, you need to verify the voltage it puts out is within the Netduino's params, but you can easily hook that up to a pin on the Netduino.
Another method is a simple normally open momentary push button. Mount the push-button such that when the door is fully closed (with the mag lock engaged) the button is depressed. Then wire the 3.3v pin from the Netduino to one lead on the switch, and the other lead to a digital I/O pin on the Netduino. Then its a simple matter of setting up the pin as an edge triggered input port in code and acting upon the change.
-dan
Good idea. if i can get hold of a monitored electric release lock then I'm pretty sure that it will do what you have suggested. Failiing that the switch is an option, its pretty much like a fridge light (i.e. when the door is open then the light comes on, when closed it will switch off).
#22648 Open Door Lock
Posted by WahidM on 10 January 2012 - 09:43 AM in General Discussion
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