Is it possible to use the Pytolon open source bike computer which is based on the Clue as a data grabber for sensor data for heart rate, etc? Can I add SD card functionality to the Clue, for instance by adding an usb memory stick or usb sd card reader to prevent data loss?
We do sell MicroSD breakout boards that you could wire up and use with the CLUE, but I think a more elegant solution would be to make use of the QSPI 2MB of Flash storage you have with this device.