G.FIT (EOL)
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G.FIT (EOL)

Overview

G.FIT is a turnkey dual-protocol ANT/Bluetooth® low energy technology (BLE) solution for wireless fitness equipment and smart bike trainers, optimized for group and classroom training applications (e.g., leader board applications) with 50+ fitness devices and multiple receivers.  G.FIT is exclusively available on modules from Garmin Canada Inc.

G.FIT Meets the challenges of group fitness

Garmin Canada Inc. has evolved individual fitness machines and smart bike trainers to incorporate wireless standards group fitness capabilities. The G.FIT solution is the result of that evolution, and solves the challenges of group fitness:

  • G.FIT works around WiFi interference to ensure large groups of 50+ devices can connect concurrently.
  • G.FIT solves pairing and setup difficulties with dual protocol support for both ANT+ and BLE heart rate monitors.
  • G.FIT makes it easy for non-technical users to pair by using proximity pairing and list pairing features.
  • G.FIT solves personal device pairing by re-broadcasting ANT+ or BLE heart rate data and works with Bluetooth FTMS (including Control Point) and the ANT+ FE-C Device Profile so that people can record entire workout sessions on their own personal devices.
  • G.FIT enables technology maintenance with both built-in support for easy wireless updates and the addition of custom tailored features and controls using the G.FIT SDK.

 

Product Brief (PDF) Datasheet(PDF) G.FIT Downloads

G.FIT Module Features

Garmin Canada Inc. offers G.FIT Fitness Equipment Modules, based on Nordic Semiconductor’s nRF52832 SoC supporting ANT+ and Bluetooth® low energy technology features aimed at fitness equipment applications and gym environments. Please refer to the G.FIT User Guide and Specification for more information about the G.FIT Library, serial interface. G.FIT modules include:

  • Nordic Semiconductor’s nRF52832 chip with 64kB RAM, 512kB Flash and a 32-bit ARM Cortex M4F CPU
  • Concurrent ANT and Bluetooth protocol operation using the S332 SoftDevice (a pre-compiled protocol stack solution for nRF52 SoCs)
  • Preloaded fitness equipment focused G.FIT Network Processor application including:
    • ANT+ FE-C with diversified frequency support and HRM device profile support
    • Bluetooth HRS/HRP (heart rate profile and service), FTMS/FTMP (fitness equipment machine service profile) and DIS (Device Information Service)
    • Enhanced coexistence support for group applications
    • Wireless and serial firmware update support
  • Certification of compliance with radio standards in major markets including North America, Australia / New Zealand, Japan and Korea. Declared conformity with radio regulations and requirements for Europe
  • Qualification by the Bluetooth SIG
  • G.FIT Library and SDK for building custom fitness equipment applications or MCU implementations using the nRF52832 SoC – refer to the G.FIT User Guide and Specification for more information
  • G.FIT modules come with RSSI calibration information stored from the factory
  • G.FIT modules are serialized from the factory with an ANT ID to ensure unique device IDs in G.FIT products
  • D52Q models support hardware drop-in compatibility with Garmin Canada FIT2 modules and other Garmin Canada M4 form factor modules (C7, AP2, N5, D52Q in certain configurations) . For drop-in replacements, the G.FIT serial interface will need to be implemented on the host MCU.
  • D52M models (M8 form factor) provide a new, smaller form factor for fitness equipment modules

Module Hardware

  • Integrated printed antenna
  • On-board 32MHz and 32.768 kHz crystal clocks
  • 1.7V - 3.6V supply (D52QGFM4IA, D52MGFM8IA)
  • 1.71V - 3.6V supply (D52QGFM4IA-A)
  • Operating temperature: Industrial (-40°C to +85°C)
  • Up to 30 GPIOs (D52QGFM4IA)
  • Up to 24 GPIOs (D52QGFM4IA-A, D52MGFM8IA)
  • Programmable output/channel from -20dBm to 4dBm
  • Excellent receiver sensitivity
    • -93dBm (ANT mode)
    • -96dBm (BLE mode)
  • 1dBm resolution RSSI
  • Total 512kB flash, 64kB RAM
  • SPI, I2C and UART interface
  • ARM SWD interface
  • Internal DC/DC converter supported
  • 20 x 20mm module (D52Q models, M4 format)
  • 14 x 9.8 x 2.0mm module (D52M models, M8 format)
  • Onboard 3-axis MEMS accelerometer (D52QGFM4IA-A)
    • LIS2DH by ST Microelectronics
    • 2 programmable interrupt pins
  • Layout compatible options with N5150M4CD, N550M4CC, N548M4CB, ANTAP281M4IB, ANTC782M4IB (for D52Q models)
  • Layout compatible options with N5150M8CD, N550M8CC, N548M8CB (for D52M models)
  • Radio regulatory approval for major markets
  • BLUETOOTH SIG qualification
  • RoHS compliant
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