Continuing the discussion from The nicest hub motors! For sale cheaper than anywhere!:
So what do you use for data logging and analysis?
At the beginning of last year I discovered the Speedict ebike computers. I got myself the Speedict Mercury for comparing the efficiency/performance of various ebike controllers. It measures voltage, current, temperature and speed (both from a sensor and from the GPS data on the phone). All of the data is stored on the device and can be viewed real-time on an Android device (no iOS support) or downloaded as a CSV file. There is also an option to upload the data to their online viewer – here is a sample output from the time when the Google Maps integration was still working:
and here is my latest ride: http://chart.speedict.com/?weblogid=14O05v057212111
The Android app was last updated on December 11, 2014 and has a few bugs so I feel like they have shifted their focus to either their BMS solution or something entirely different. Luckily the CSV export works fine and Google Sheets does its magic – here is the same ride on Google Sheets: