Hello can the usb port be used to connect a usb keyboard for example?
I have a big problem
Arduino, Beablebone, cubieboard etc have USB as default however to read external hw, for wifi i need to buy extra hardware.Could be a problem with drivers, etc
So i have Electric imp , wifi defaults but no USB to read for example keystrokes from a keyboard.
My goal is to read an RFID reader.
Either i program one, this takes me a lot of time that i dont have now or i use a simpler solution
this one
http://www.ebay.co.uk/itm/mifare-card-reader-HF-14443A-USB-desktop-13-56mhz-RFID-UID-contactless-reader-/111038771300?pt=UK_BOI_Industrial_Supply_Security_Equipment_ET&hash=item19da6d3064
I dont have to program it , it acts like a usb keyboard and outputs the value of the card to the usb port.
A lot simpler but i need usb in my electric imp
I´m stuck
Help apreciated
Thank you
sorry, USB is only for power
We actually wrote some code for a Parallax Serial RFID Reader.
It’s super simple:
`//Shortcuts and Globals
uart <- hardware.uart12;
en_l <- hardware.pin1;
id <- “”;
last <- “”;
function toggleLED(){
en_l.write(1);
imp.sleep(0.5);
en_l.write(0);
}
function uartCallback(){
local b = uart.read();
while( b > 0){
//Look for newline
if(b == 13){
if(id != last){
imp.wakeup(5,function(){id = “”; last = “”;});
server.log(“ID: “+id);
agent.send(“id”,id);
last = id;
toggleLED();
}else{
server.log(“Duplicate”);
}
id = “”;
}else if( b > 32){
id += format(”%c”,b);
}
b = uart.read();
}
}
uart.configure(2400, 8, PARITY_NONE, 1, NO_CTSRTS | NO_TX, uartCallback);
en_l.configure(DIGITAL_OUT);
//Enable The RFID Reader
en_l.write(0);`
I need 13.56Mhz reader
Also the price is high compared to some chino alternatives
A quick search for 13.56Mhz serial rfid readers turns up a few results, here’s one that might be promising…
You could also look into a FTDI USB -> Serial converter chip of some kind.
