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GEM 2 Module Hardware Integration Guide

Version 0.1

Wahoo Fitness

4

90 West Wieuca Road, Suite 110

Atlanta, GA 30342

www.wahoofitness.com

1‐877‐978‐1112

Overview and Key Features

The GEM module has been designed to allow OEMs to easily add Bluetooth and ANT+

wireless connectivity in their product offering. The GEM 2 module incorporates Wahoo
Fitness software specifically designed to enable fitness machines such as treadmills,
exercise bikes, ellipticals, rowers, stair climbers and step machines to wirelessly
communicate exercise data with smart phone or tablets as well as leaderboard software

systems. For applications other than fitness machines, developer’s can use Nordic

Semiconductor’s SDK to create their own embedded application specific software.

The GEM 2 module is based on Nordic Semicondutor’s nRF52832 multiprotocol Bluetooth

and ANT+ chipset. The GEM 2 module offers a variety of peripheral interfaces including
UART, SPI, I2C, ADC, and GPIO, has a maximum transmit power of +4dBm, and a sensitivity

of ‐96dBm. This manual is intended to assist hardware integration of the GEM 2 module
into a given design. Details on Wahoo’s GEMSAFE and GEMHCI software can be found
www.wahoogy.com. For applications using Nordic Semiconductor SDK, please refer to

Nordic Semiconductor’s SDK available at developer.nordicsemi.com.

Features

• ‐96 dBm sensitivity
• TX Power‐20 to +4dBm in 4dB steps

• xxm line of sight range

• 5.3 mA peak TX @ 0dB
• 5.4 mA peak RX

• 1dB dB RSSI resolution
• ARM® Cortex

TM

M4F 32 bit processor running at 64MHz

• 512 kB embedded flash memory and 64 kB RAM
• Onboard NFC for Out of Band pairing
• Peripheral Interfaces: ADC, GPIO, SPI, I2C, UART, Low power comparator,

Temperature sensor

• AES HW encryption
• FCC, CE, IC certified

• Integrated Antenna
• RoHS compliant

• Bluetooth End Product Listed

• Integrated Fitness Equipment Firmware and mobile application

Summary of Contents for WF116

Page 1: ...Bluetooth and ANT Module Hardware Integration Guide Version 0 1 July 27 16 Wahoo Fitness 90 W Wieuca Road N E Suite 110 Atlanta GA 30342 Telephone 1 877 978 1112 Email support wahoofitness com www wa...

Page 2: ...ation Guide Version 0 1 Wahoo Fitness 2 90 West Wieuca Road Suite 110 Atlanta GA 30342 www wahoofitness com 1 877 978 1112 Wahoo Fitness LLC 2015 Revision History Version Revision Date Change History...

Page 3: ...ITIONS 7 ELECTRICAL SPECIFICATIONS 8 DESIGN CONSIDERATIONS 8 HARDWARE 8 MODULE LAYOUT CONSIDERATIONS 10 ANTENNA CHARACTERISTICS 11 MECHANICAL INFORMATION 12 DIMENSIONS IN MM 12 RECOMMENDED PAD LAYOUT...

Page 4: ...tiprotocol Bluetooth and ANT chipset The GEM 2 module offers a variety of peripheral interfaces including UART SPI I2C ADC and GPIO has a maximum transmit power of 4dBm and a sensitivity of 96dBm This...

Page 5: ...itivity Range 4 1 Single Mode Peripheral Broadcast 2 402 2 480 GHz 4dBm 20dBm 96dBm up to TBDm line of sight Peripherals UART Host Interface GPIO TX RX 115 2kbps n 8 1 Link Indicator Pairing Button FW...

Page 6: ...12 Hardware Specifications Block Diagrams and Pinout Hardware Block Diagram Software Diagram P0 0 1 11 P0 0 2 12 P0 0 8 14 18 VCC 26 G N D 17 GND LED1 10 P0 0 7 13 NF C 1 15 NF C 2 16 P0 05 8 P0 30 6...

Page 7: ...r GPIO 8 NC 9 NC RESERVED Reserved for 32kHz crystal if a real time clock is needed during module sleep 10 NC RESERVED Reserved for 32kHz crystal if a real time clock is needed during module sleep 11...

Page 8: ...nentry The following section provides suggestions to ensure successful design in of the GEM 2 module Hardware VCC Ensure the power source operating range and noise is within the specified limits for t...

Page 9: ...st The UART is required for communicating between the GEM 2 module and fitness machine console using the GEMSAFE or HCI command protocol Pins 13 and 14 of the module have been configured as the UART i...

Page 10: ...ge 3 Mechanical items especially metal should be kept as far as possible from the module antenna in all directions including above and below the board surface If possible move mechanical items out and...

Page 11: ...a GA 30342 www wahoofitness com 1 877 978 1112 Antenna Characteristics The GEM 2 module includes an integrated monopole chip antenna Antenna performance will depend on host PCB layout The following pl...

Page 12: ...1 Wahoo Fitness 12 90 West Wieuca Road Suite 110 Atlanta GA 30342 www wahoofitness com 1 877 978 1112 Mechanical Information Dimensions in mm Top View Side View Recommended Pad Layout The land patter...

Page 13: ...methods and procedures specified in OET Bulletin 65 Supplement C This transceiver must not be co located or operating in conjunction with any other antenna transmitter or external amplifiers Further...

Page 14: ...radio or television reception which can be determined by turning the equipment off and on the user is encouraged to correct the interference by one or more of the following measures Re orient or relo...

Page 15: ...t toujours responsable de tester leur produit final pour les exigences de conformit suppl mentaires n cessaires ce module install par exemple les missions de p riph riques num riques les exigences de...

Page 16: ...alth and Safety EN60950 1 2006 A11 2009 A1 2010 A12 2011 Electromagnetic compatibility EN301489 17 Vx x x in accordance with EN 301 489 1 V1 8 1 Radio Frequency Radiated Emissions EN300 328 V1 8 1 Wah...

Page 17: ...page https www bluetooth org en us test qualification qualification overview 3 Go to Create a Listing https www bluetooth org tpg QLI_SDoc cfm 4 In the area Reference a Qualified Design Enter End Pro...

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