@nico42 Minor correction to your blog post: “Accumulated brush time”. The example “00:00:02:00” does not mean 2s. The meaning of the “02:00” is not documented right now. (see Künzi: “Only the first two bytes at address 0x24 are used for timekeeping. Once the counter reaches FF:FF:02:00 it stops going up (18 hours of continuous brushing).”) (Using “address” for the “page” or “block”: Not wrong in the NFC context but confusing if you are not used to NFC …)