Auxiliary Heart Rate

A simple data field that connects to ANT+ heart rate monitors, displays heart rate (in bpm), and records it into the FIT file. This was developed so that I could use the built-in optical heart rate monitor on my Forerunner 235 and an external ANT+ chest strap at the same time, logging values from both for comparison. Note that you should not have the external ANT+ heart rate monitor paired to the watch in the usual fashion, the data field will make its own connection.

Version 1.1 added the ability to set the ANT+ ID of the external heart rate monitor you wish to connect to. Set it to zero (the default) to search for any HRM (it will select the strongest signal, probably, once connected it won't switch to another HRM).