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fq/format/fit/fit.md

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Limitations

  • Fields with subcomponents, such as "compressed_speed_distance" field on globalMessageNumber 20 is not represented correctly. The field is read as 3 separate bytes where the first 12 bits are speed and the last 12 bits are distance.
  • There are still lots of UNKOWN fields due to gaps in Garmins SDK Profile documentation. (Currently FIT SDK 21.126)
  • Compressed timestamp messages are not accumulated against last known full timestamp.

Convert stream of data messages to JSON array

$ fq '[.data_records[] | select(.record_header.message_type == "data").data_message]' file.fit

Authors

References