I²C smartRFID Smart Sensor
The second smart sensor I'm working on is a RFID reader, called smartRFID.
Based on the functional specifications, the main choices are about the sensor and the MCU.
Because I'm a hobbyist, I'd prefer to deal with DIP packages rather than SOIC or, even worse, SSOP.
Selecting the Sensor
After an extensive research, I came with two short-lists, one for RFID readers and the other for MCUs.
RFID readers are available in a very integrated package with, on one side side, connection to the coil and, on the other side, digital output. One key specification is the range.
As additional benefits, there's no need for a MCU and thus, no programming required!
However, the digital output requires a protocol adapter to convert the signal into I²C bus.
Building the Prototype
Contrary the the smartColours sensor, the RFID reader comes ready to use.
Only a protocol adapter with logic level converter is required. So there's no need for a prototype!