Field description message

Field description messages define the developer fields: custom fields added by third party applications to standard messages. Each one gives the name, type, units and scale of a field, so that any decoder can read it.

FIT name: field_description
Global message number: 206
JavaScript SDK key: fieldDescriptionMesgs
Fields: 15

Fields

developerDataIndexUint8
Local index linking developer field descriptions to the developer_data_id message that declares the application. It is how custom fields from Connect IQ apps are attached to their owner.
fieldDefinitionNumberUint8
Number identifying the field among the fields of the application.
fitBaseTypeIdEnum
Base type of the field: uint8, sint16, float32, string…
17 possible values
- string
- uint16
- uint32
- float32
- sint16
- sint32
- sint8
- uint8
- enum
- float64
- uint8z
- uint16z
- uint32z
- byte
- sint64
- uint64
- uint64z
fieldNameString
Name of the field.
arrayUint8
Number of elements, for array fields.
componentsString
Components the field is made of.
scaleUint8
Scale to divide the raw value by.
offsetSint8
Offset to subtract from the raw value after scaling.
unitsString
Units of the field.
bitsString
Bit sizes of the components of the field.
accumulateString
Whether the value accumulates across messages.
fitBaseUnitIdEnum
Base unit of the field.
3 possible values
- other
- kilogram
- pound
nativeMesgNumEnum
Standard message the developer field is added to.
127 possible values
- length
- split
- set
- record
- session
- hr
- video
- event
- sport
- activity
- workout
- course
- totals
- bloodPressure
- mfgRangeMin
- mfgRangeMax
- fileId
- capabilities
- deviceSettings
- userProfile
- hrmProfile
- sdmProfile
- bikeProfile
- zonesTarget
- hrZone
- powerZone
- metZone
- trainingSettings
- goal
- lap
- deviceInfo
- workoutStep
- schedule
- weightScale
- coursePoint
- software
- fileCapabilities
- mesgCapabilities
- fieldCapabilities
- fileCreator
- speedZone
- monitoring
- trainingFile
- hrv
- antRx
- antTx
- antChannelId
- monitoringInfo
- battery
- pad
- slaveDevice
- connectivity
- weatherConditions
- weatherAlert
- cadenceZone
- segmentLap
- memoGlob
- segmentId
- segmentLeaderboardEntry
- segmentPoint
- segmentFile
- workoutSession
- watchfaceSettings
- gpsMetadata
- cameraEvent
- timestampCorrelation
- gyroscopeData
- accelerometerData
- threeDSensorCalibration
- videoFrame
- obdiiData
- nmeaSentence
- aviationAttitude
- videoTitle
- videoDescription
- videoClip
- ohrSettings
- exdScreenConfiguration
- exdDataFieldConfiguration
- exdDataConceptConfiguration
- fieldDescription
- developerDataId
- magnetometerData
- barometerData
- oneDSensorCalibration
- monitoringHrData
- timeInZone
- stressLevel
- maxMetData
- diveSettings
- diveGas
- diveAlarm
- exerciseTitle
- diveSummary
- spo2Data
- sleepLevel
- jump
- aadAccelFeatures
- beatIntervals
- respirationRate
- hsaAccelerometerData
- hsaStepData
- hsaSpo2Data
- hsaStressData
- hsaRespirationData
- hsaHeartRateData
- splitSummary
- hsaBodyBatteryData
- hsaEvent
- climbPro
- tankUpdate
- tankSummary
- sleepAssessment
- hrvStatusSummary
- hrvValue
- rawBbi
- deviceAuxBatteryInfo
- hsaGyroscopeData
- chronoShotSession
- chronoShotData
- hsaConfigurationData
- diveApneaAlarm
- skinTempOvernight
- hsaWristTemperatureData
- napEvent
- sleepDisruptionSeverityPeriod
- sleepDisruptionOvernightSeverity
nativeFieldNumUint8
Number of the standard field this developer field corresponds to, if any.
mesgNumString
Global message number identifying the kind of message. Decoders use it to know which profile to apply to the data.

Other file and device messages

See all the FIT messages