GEM Module Hardware Integration Guide
Version 0.3
Wahoo Fitness
8
90 West Wieuca Road, Suite 110
Atlanta, GA 30342
www.wahoofitness.com
1-‐877-‐978-‐1112
Pin Definitions
Pin number
Pin Name
Function
Comment
0
GND
Connect to GND Plane
1
GND
Connect to GND Plane
2
NC
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
9
PAIR
GPIO to trigger advertising
10
LED
LED for Pairing/Connection
11
NC
12
NC
13
NC
14
NC
15
TX
UART Transmit
CSAFE Host Interface
16
RX
UART Receive
CSAFE Host Interface
17
GND
Module Power Ground
18
VCC
Module Power Supply
19
NC
20
NC
21
NC
22
RESET/SWDIO Module Reset/Debug Interface
23
SWCLK
Debug Interface
24
NC
25
NC
26
GND
Connect to GND Plane