Hardware Manual

NFC Tag Board Connection
The GEM3NFC module includes an additional connector to support connection of an NFC
tag board using I2C communications. Pinout of the I2C interface is shown below:
NFC Reader
The GEM3NFC module incorporates an NFC reader chip allowing for decoding of compatible
NFC tags for user identification for example. In addition, the NFC reader also supports NFC
type 4 tag emulation for tap to pair support with compatible Android and iOS applications.
NFC Antenna
The GEM3NFC module includes an integrated NFC antenna.
GEM3 module
The GEM3NFC includes North Pole Engineering’s GEM3 Bluetooth 5.0 and ANT wireless
OEM module and includes North Pole Engineering’s embedded software specifically
designed for fitness equipment mobile app, group fitness, and wearable connectivity
applications.
Specifications
Operating Parameters
Parameter
Min
Typical
Max
Supply Voltage
3.0V
3.3V
+3.6V
Operating Temperature @ 3.3V
-40C
+85C
Serial Interface
3.0
3.3V
3.6V
1
2
3
4
5
P2
NFC TAG
GND
V3R3
TAG_I2C_SCL
TAG_I2C_SDA
TAG_FD
GND
TP3
TP4
TP5
4.7uF
C4