2. Meet NFC Copy Cat
As mentioned NFC Copy-Cat is a product that features the PN532 V3 module, a modest but useful NFC module. This has the possibility of using some communication protocols (SPI, UART HSU, I2C), but this project was designed to use the spi interface, the module has a switch to select the type of interface to use.
We have designed a beautiful board, the same size as the PN532 module, which makes it easy to carry anywhere, its heart is an ARM cortex M0, specifically a SAMD21, small, powerful, with all the advantages of the ARM architecture, which is accompanied by flash memory for support Circuit Python. The board has 3 programmable on-board LEDs on the back, in the front 1 more LED for on / off and a another LED that tells us if the lipo battery is on since you can charge a 3.7v battery! On the back 3 buttons were also added, one is for resetting and the other two are programmable, and it has its coil.
NFC Copy Cat on the front
NFC Copy Cat on the back