... design, user-friendly core board used independently. In order to reliably connect with the floor, the core board with 170 ... ,1 GB of NandFlash, and support to upgrade to 8GB; 7, iNAND Flash, maximum support to the 8G; (remaining separate welding position ... ; 17, SIM300 GPRS module interface 18, SIRFIII GPS module interface (including the antenna interface);19, Hayward WIFI module interface 20,50 PIN ...