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CORE firmware changelog

Updated

A running log of CORE firmware updates

The changelog outlines the key updates and improvements to the CORE sensor firmware. Please follow this link for information on updating / changing CORE sensor firmware. ​

Version

Release date

Details
0.9.2
2025-07-17

Fixed

  • Bugfix when the sensor was used with COROS devices and afterwards with another platform like the CORE app only. The heart rate remained constant after disconnecting from COROS.
0.9.1
2025-04-14

Fixed

  • Bugfix battery state indication for wearable connections (e. g. COROS)
0.9.0
2025-03-06

Fixed

  • Bugfixes and firmware stability improvements
0.8.7
2024-09-25

Added

  • Added Heat Strain Index to live data broadcast. This will enable Heat Strain Index export through fit files that are logged from third party wearables in the near future.

Fixed

  • Fixed problems with pairing certain Bluetooth heart rate monitors, including some COROS products.
0.8.6
2024-03-18

Fixed

  • Fixed bug when multiple heart rate monitors paired to CORE
  • Various bug fixes
0.8.4
2023-11-22

Added

  • support for heart rate broadcasting via public Bluetooth API

Fixed

  • Various bug fixes
0.8.3 
2023-10-09

Added

Fixed

  • Various bug fixes
0.8.2
2023-07-09

Fixed

  • Fix bug with COROS watches
0.8.1
2023-06-19
  • Implement advanced algorithm switching mode logic (default ‘simple switching’)
  • Enable ANT writing into Moxy (with default value core temp in both SmO2 and THb)
  • Allow up to 3 simultaneous BLE connections
  • Improve iOS Firmware update speed
  • BLE connection improvements
0.8.0
2023-02-23
  • Enables concurrent use of the CORE app and a Bluetooth client (e.g. BLE smartwatch)
  • Reduced ripple on ANT+ and BLE body temperature signal output
0.7.4
2022-08-10
  • Improved resolution of history data interval to once every minute (before: once every 5 minutes)
0.7.3
2022-04-29
  • Improvements on the smart algorithm switching.
  • Fixes excessively high temperature readings after removing and re-positioning the sensor. Note: equilibration time until first value is displayed might increase in cold ambient situations.
0.7.2
2022-03-01
  • Fixes excessively high temperature readings at the beginning of a workout.
0.7.0
2022-02-02
  • Smart algorithm switching
    • CORE automatically switches to low activity algorithm when approriate (rest, sleep), even when heart rate monitor is paired.
  • Last 4 digits of CORE ID added to the device name
    • In app device scan, device will show up as "CORE 3A:5F" instead of "CORE"
    • Facilitates identification of unkown devices under iOS
    • Note: Only applies if no nickname is set
  • Adaptions to Bluetooth Health Thermometer Profile (HTP)
    • Extention of Device Information Service to fully comply with HTP
    • only relevant for developers - see this link and this link or contact us for details
0.6.2
2021-12-23
  • Adaptions to Bluetooth temperature profile
    • only relevant for developers - see this link or contact us for details
  • Adaptions to ANT profile
    • only relevant for developers - see this link or contact us for details
0.6.0
2021-09-24
  • Adapted LED feedback:
    • Battery state of charge indication upon shaking core
    • Adapted blink pattern to indicate heart rate monitor connection status
    • "slow blink" pattern when core is charging
  • Standby mode support (Requires CORE app 1.3.5): Increases time between re-charges to up to 5 weeks
  • Bugfix: ANT connection logic leading to heart rate re-connection problems
  • Shaking CORE leads to an addictional scan for heart rate monitors
0.4.1 
2021-06-21
  • Improved handling of bad heart rate signal
  • Data quality as low in case of extreme jumps in HR signal
  • Intermediate better support on Wahoo bicycle computers
0.4.0
2021-05-26
  • Activity algorithm dynamic switching without necessary algorithm reset:
  • This is a big change internally when transitioning between the 24/7 Everyday Living algorithm and the Sports Algorithm (with heart rate monitor)
  • Bugfix: Guard against sports algorithm rare crash (scaled feature)
  • Improved "cold start" for greater initial accuracy
  • Heart Rate values < 30 are now regarded as invalid
  • Proper rounding for skin_temp in ANT CORE profile
0.3.20
2021-04-23
  • Set data quality to 0 if charger is plugged-in
  • Reset CoreTemp and quality when leaving a measuring mode
  • Miscellaneous internal bug fixes
0.3.19
2021-03-24
  • Update on data quality 0 is used
  • Always save history independent of quality (before: only saved if quality>0)
  • Continuously update BLE health thermometer profile core body temp value
    • send notifications if enabled
    • transmit IEEE11073-NaN if quality == 0
  • Research mode channels fields logging updated
  • Server unit calibration settings verified and synced properly
0.3.18
2021-03-10
  • Auto-fix too many paired Heart Rate monitors bug at firmware startup
  • Updates to the research mode functionality
0.3.17
2021-02-17
  • Add standard BLE battery profile
  • Run ANT Heart Rate monitor search after new device paired or new measurement started
  • ANT Core profile: page0 HR status now indicates active HR connection (instead of 'min. 1 device paired')
  • Miscellaneous internal bug fixes
0.3.16
2021-02-04
  • Quality score in no-sports mode now based updated to more relevant value
  • ANT Core profile
    • allow pairing with wildcards
    • handle page70 requests for pages 0 and 1
    • transmit correct ANT page0 HR source status
    • HR pairing via ANT
0.3.15 and earlier
 Prior change logs available upon request

 

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