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Forerunner 255 - Software Version 21.20 - Live

Software version 21.20 for the Forerunner 255 Series is currently live. 

To download this update on the Forerunner 255 (Basic and Music) Series devices, go to: Main menu > Settings > System > Software Update > Check For Updates

  • Change log: 

    • Fixed an issue where Connect IQ watch face may crash.

21.19 Forerunner 255 Basic Series Change log:

  • Adds compatibility for Garmin Coach strength training plans.
  • Improvements to support Pool Swim workout with pace alerts and critical swim speed.
  • Improvements to the Pool Swim rest screen and alert tones.
  • Adds the Moon Phase glance.
  • Lactate Threshold estimates are applied automatically after training with heart rate.
  • Fixed an issue where some types of daily suggested workouts do not show estimated training effect.
  • Fixed an issue where when the timer is set to silent mode, it still makes a sound.
  • Fixed an issue where Android smart notification images sometimes fail to load.
  • Fixed an issue where heart rate randomly spikes after activity is saved.
  • Fixed an issue where Navigation using map only adds turn icon for some sports profiles.
  • Fixed an issue where accent color of "Other" activities would not save.
  • Fixed an issue where custom workouts would not work in some activities.
  • Fixed an issue where adding Heart Rate to glance folder would break when heart rate is disabled.
  • Fixed an issue where sleep would sometimes not be recorded when waking up long after configured wake time.
  • Fixed an issue where the edit icon appeared intrusive.
  • Fixed an issue where device would return to previous page when browsing Weather glance.
  • Fixed an issue where sleep mode would resume after user manually exited sleep mode.
  • Fixed an issue where Triathlon activity profile copies were showing as Run profiles.

21.19 Forerunner 255 Music Series Change log:

  • Adds compatibility for Garmin Coach strength training plans.
  • Improvements to support Pool Swim workout with pace alerts and critical swim speed.
  • Improvements to the Pool Swim rest screen and alert tones.
  • Adds the Meditation activity.
  • Adds the Moon Phase glance.
  • Lactate Threshold estimates are applied automatically after training with heart rate.
  • Function Threshold Power estimates are applied automatically after training with power.
  • Fixed an issue where some types of daily suggested workouts do not show estimated training effect.
  • Fixed an issue where when the timer is set to silent mode, it still makes a sound.
  • Fixed an issue where Android smart notification images sometimes fail to load.
  • Fixed an issue where heart rate randomly spikes after activity is saved.
  • Fixed an issue where Navigation using map only adds turn icon for some sports profiles.
  • Fixed an issue where accent color of "Other" activities would not save.
  • Fixed an issue where custom workouts would not work in some activities.
  • Fixed an issue where adding Heart Rate to glance folder would break when heart rate is disabled.
  • Fixed an issue where sleep would sometimes not be recorded when waking up long after configured wake time.
  • Fixed an issue where the edit icon appeared intrusive.
  • Fixed an issue where device would return to previous page when browsing Weather glance.
  • Fixed an issue where sleep mode would resume after user manually exited sleep mode.
  • Fixed an issue where Triathlon activity profile copies were showing as Run profiles.