An important note in advance: all projects can be realised with all Calliope mini versions.
We presented our first final prototype (version 0.8-0.9) of the later series at the IT Summit in November 2016. Only 2000 of these have been produced.
The official release version (1.0) has been available since the beginning of 2017, and the Calliope logo is printed on the bottom left-hand side of the screen. The pin bar in the middle of the board has 5 holes in this version.
Version 1.3 has been available since mid-2018 and can be recognized by the fact that the pin header now has 6 holes (another ground has been added for easier motor connection).
The current version 2.0 (Calliope mini REV2) was presented in mid-2020, which now includes the option of saving an additional 25 programmes permanently. These programmes can be called up at any time (without having to use a computer).