UnitCounter

Link to hackster.io project page

https://www.hackster.io/louis-poncet/unitcounter-70e3b1

UnitCounter box :

Project made to run on Arduino Micro

Arduino micro v3
Adafruit_PN532
GPS fw5632 adafruit.it/746

UnitCoutner master :

Project made to run on Arduino Yun

Arduino micro Yun
Adafruit_PN532

GPS connections :

If using hardware serial:
Connect the GPS TX (transmit) pin to Arduino RX1 (Digital 0)
Connect the GPS RX (receive) pin to matching TX1 (Digital 1)
If using hardware serial, comment

Adafruit_GPS GPS(&Serial1);
HardwareSerial mySerial = Serial1;
#define GPSECHO  false