Hi, SparkFun community. I am trying to build a wearable prototype that can detect RFID tags and send haptic feedback to user with vibrations. I would appreciate if you can answer some of the questions I have below
You can use any RFID reader that can communicate using I2C, SPI, or Serial communication that are available on the pins of the LilyPad. Just double check that voltage levels before powering.
The main difference is that the Qwiic RFID work with our Qwiic Ecosystem which means I2C communication. The USB reader is geared towards Serial.
We do not carry a module in that family that can read 3ft away
You could drive the motor based on what the microcontroller sees that comes in or you could add that mosfet board if you want to probe when a card is read then yes you can add it. Just follow the guides to better determine what works for you.
We would suggest using one of the ID type readers like the ID-12LA or ID-20LA
What is the difference between Qwiic RFID and RFID USB Reader?
The Qwiic RFID has a converter chip that translates serial to I2C while the regular reader board just uses serial. We recommend sticking to the plain serial reader as it’s simpler to write code for.
is there an RFID reader functions same with this product but reads up to at least 3ft?
[[There is](https://www.sparkfun.com/products/14066), however it's __*[u]MUCH[/u]*__ more complicated to use and can not safely be used on a wearable. Further, the library wasn't written to be used on a Lilypad and would likely require a re-write to function. Furthermore, that product requires a [[fairly large antenna](https://www.sparkfun.com/products/14131) to get the range you're looking for. We don't recommend this board unless you are an experienced programmer and have a very good understanding of electronics.
Do I need Mosfet Power Controller for Vibrator when I have LilyPad USB Plus
Thank you so much for the answers! I just saw that RFID USB is out of stock so I am going to get Qwiic RFID (https://www.sparkfun.com/products/15191) . However I see there is cable output in that. How can I connect that Qwiic cable to the LilyPad USB Plus https://www.sparkfun.com/products/14631 . Do I need additional tool or converter?
You’d need a Qwiic cable, something like [this would work.
OR you could just solder directly to the pads on the edge of the board. Keep in mind that writing code for the Qwiic board is a little more complex than for the RFID USB board.](https://www.sparkfun.com/products/14425)
Thank you Chris for your quick respond. I just found a RFID USB starter kit available on SparkFun. So if I understand correct, when I use RFID USB I won’t need to have a LilyPad anymore since it has a USB entrance for programming. Is that correct?
Is there any other parts I need to purchase with RFID USB kit to just make a simple RFID tool. I need a simple solution that gives prompt when it reads the card. For example, I may use the vibrator instead of buzzer.
If I go with the RFID USB starter kit, how can add a lithium battery on it? What kind of converter or cable socket I need to purchase? https://www.sparkfun.com/products/13853
Sorry for keep adding questions. This is my first time and I want to make sure I put the correct parts in my shopping cart. I appreciate your help