Hardware Manual

GEM3NFC Host Protocol
The GEM3NFC supports North Pole Engineering’s GEMHCI protocol for communication
between the GEM3NFC board and the console MCU using the GEM3NFC module’s serial host
connection. The GEMHCI protocol supports a port speed of 115.2Kbps.
The GEMHCI protocol is a binary protocol and is used to configure the GEM3NFC operation
as well as pass fitness equipment related data to the GEM3NFC for broadcasting to
connection applications using its Bluetooth/ANT+ radio. The GEMHCI protocol can also be
used to send data such as heart rate and calories from a connected fitness application or
device to the console through the GEM3NFC module.
Details of the GEMHCI protocol are provided in the GEMHCI reference manual. Please visit
our knowledge base at http://npe-inc.zendesk.com for the latest version of the GEMHCI
reference manual.
NFC Reader T4T card mode operation
ISO/IEC 1444A card mode