Fit4Ruby
Fit4Ruby is a http://www.ruby-lang.org libary to read and write FIT files.
This libary is still work in progress and probably not yet ready to be used in your application. However, you are welcome to try it and send me comments and patches. It was developed to form the back-end of https://github.com/scrapper/postrunner.
Supported Devices
Tested devices: Garmin FR620, Fenix 3, Fenix 5, Fenix 5X, Fenix 6X
Other Garmin devices that generate FIT files may work as well. Since I don't have any other devices, I can't add support for them.
##Supported Operating Systems
This library was developed and tested on Linux using Ruby 2.0 (MRI). Other operating systems that are Supported by Ruby 2.0 may probably work as well.
##Usage
You can create an Activity.
require 'fit4ruby'
a = Fit4Ruby::Activity.new
a.total_timer_time = 30 * 60
a.new_user_profile({ :age => 33, :height => 1.78, :weight => 73.0,
:gender => 'male', :activity_class => 4.0,
:max_hr => 178 })
a.new_event({ :event => 'timer', :event_type => 'start_time' })
a.new_device_info({ :device_index => 0 })
a.new_device_info({ :device_index => 1, :battery_status => 'ok' })
ts = Time.now
0.upto(a.total_timer_time / 60) do |mins|
ts += 60
a.new_record({
:timestamp => ts,
:position_lat => 51.5512 - mins * 0.0008,
:position_long => 11.647 + mins * 0.002,
:distance => 200.0 * mins,
:altitude => 100 + mins * 2,
:speed => 3.1,
:vertical_oscillation => 9 + mins * 0.02,
:stance_time => 235.0 * mins * 0.01,
:stance_time_percent => 32.0,
:heart_rate => 140 + mins,
:cadence => 75,
:activity_type => 'running',
:fractional_cadence => (mins % 2) / 2.0
})
if mins > 0 && mins % 5 == 0
a.new_lap({ :timestamp => ts })
end
end
a.new_session({ :timestamp => ts })
a.new_event({ :timestamp => ts, :event => 'recovery_time',
:event_type => 'marker',
:data => 2160 })
a.new_event({ :timestamp => ts, :event => 'vo2max',
:event_type => 'marker', :data => 52 })
a.new_event({ :timestamp => ts, :event => 'timer',
:event_type => 'stop_all' })
a.new_device_info({ :timestamp => ts, :device_index => 0 })
ts += 1
a.new_device_info({ :timestamp => ts, :device_index => 1,
:battery_status => 'low' })
ts += 120
a.new_event({ :timestamp => ts, :event => 'recovery_hr',
:event_type => 'marker', :data => 132 })
Now you can have the accumulated data for laps and sessions computed.
a.aggregate
Save it to a file.
Fit4Ruby.write('TEST.FIT', a)
Or read an Activity from a file.
a = Fit4Ruby.read('TEST.FIT')
Then you can access the data in the file.
a.records.each do |r|
puts "Latitude: #{r['position_lat']}"
puts "Longitude: #{r['position_long']}"
end
Please see lib/fit4ruby/GlobalFitMessages.rb for the data fields that are supported for the various FIT record types.
License
See COPYING file.