One uses the LiquidCrystal_I2C library (I²C display). The other uses the LiquidCrystal library (parallel display). In the code, set: USE_I2C = 1 for I²C displays (with LiquidCrystal_I2C) USE_I2C = 0 ...

The SparkFun Qwiic RFID Reader is a simple I 2 C based RFID Reader. It can hold up to 20 unique RFID tag IDs and their scan times, while also providing an interrupt pin for easy on the fly tag ID ...

The use of Radio Frequency IDentification (RFID) technologies is growing. Many different applications are implemented in various sectors, and used for very different purposes. RFID enables wireless ...