Changes
/* Introduction to fitlet2 */
* [https://fit-iot.com/web/products/fitlet2/ fitlet2 product page]
* [https://fit-iot.com/files/fitlet2/docs/fitlet2-owners-manual.pdf owner's manual]
* [https://fit-iot.com/files/fitlet3/documents/fitlet2-vs-fitlet3.pdf Comparison of fitlet3 vs fitlet2 characteristics]
=== Hardware ===
