I have a Tagsense ZR USB active rfid reader and ZT 50 active tag and i want to interface both of them to two arduino boards separately. The reader sends out TTL(3.3V) data at a baud rate of 57600 bps ,no parity,1 stop bit,no flow control.
I’m using the usb to only power the reader.There is a TTL(3.3 V) interface on the board as shown in the manual.
http://tagsense.com/images/stories/prod … ief-v1.pdf
I will interface the TX and RX pin to the arduino for serial communication.Now can anyone tell me which the arduino boards to use.
My first choice would be to look at the 3.3V boards so there’s no need to have any logic level translators. The question would then be whether their 8MHz clock rate would hamper your processing. Looking at the 57.6K baud rate, the error (baud rate mismatch) at the Arduino end is somewhere in the 2.1 - 3.5% range … perhaps high enough to cause some missed bytes in a noisy environment. You could of course change the oscillator to reduce that error but that then entails a few other changes as well.
https://www.sparkfun.com/products/10914
https://www.sparkfun.com/products/11114
https://www.sparkfun.com/products/10999
W/o knowing more about the details of your application, how you intend to power the systems and perhaps the ideal form factor of your final product, all the above would seem to be equally good choices. I might lean towards built-in USB if you’re interfacing to a PC.