Release notes for Kaffelogic Nano 7 firmware Current release version 7.4.5.1100 released 3 June 2020 summary of changes between 7.4.5 and previous release (7.3.13, 1 April 2020) - new longer cool down cycle, makes back-to-back roasting easier, also improved flavour - support for three zones - support for power profiling - support 220V element if fitted - minor bug fixes for rare edge cases version 7.4.5 beta - 12 May 2020 - supports profile schema 1.6 - add a third zone version 7.4.4 beta - - implement power profiling in zones version 7.4.3 beta - - extended cooldown time - minimum cooldown length 3:50 - set ambient temperature at end of completed extended cooldown or 90 mins between roasts - smooth transition from cooldown high speed to cooldown slow speed - support 220V element if fitted - bug fix: manual mode not returning to auto mode correctly in every case - bug fix: include density factor in logged fan RPM in manual mode version 7.3.13.1095 released 1 April 2020 - critical bug fix: ROR calculation becomes incorrect when roaster has been on for more than 90 mins, fixed summary of changes between 7.3.12 and previous release (7.3.10 19-Dec-2019) - improvements to manual mode (aka timer mode) to assist users who use manual mode while designing profiles - fixed a couple of file issues which were causing rare problems with log files and profile files version 7.3.12.1064 released 10 March 2020 - bug fix: manual mode to auto mode bug when originally entered manual mode from displayInfo mode version 7.3.12.1060 beta - - modify 'Please turn me off now' message so that roaster can actually be left on and re-awakened by any button press - implement logging of fan RPM during manual mode - improve logging of ROR so that it is correctly logged in manual mode (also remove small time-shift of logged ROR data caused by model predict) - modify manual mode prompt text to make it more obvious how manual mode works (add - and + to the prompts) - improve error recovery of log file so that only one log file is written per roast, even if a file error occurs while logging version 7.3.11.1040 beta - bug fix: hidden file at end of directory was blocking profile loading for some Mac users version 7.3.10 released 19 December 2019 - implement recording 'expect_fc' and 'expect_colrchange' in the log - some very small changes for rare minor issues - ensure level is saved after loading a new profile (it wasn't saving to EEPROM unless it was changed) - fix obscure fan motor voltage calculation issue (where sometimes not enough data) - increase threshold for rejecting ambient temperature to 45 deg C (was 35) - use lowest of reference and probe temperatures when determining ambient temperature (was always using probe) - always use reference temperature when determining ambient temperature if reference has dropped below last ambient version 7.3.9 released 5 August 2019 - improve error handling of USB Memory Stick - this should eliminate the zero-byte file phenomenon - display USB icon when logging starts - this help assure the user that logging is taking place - increase 'debounce' times of buttons to prevent accidental double pushes being detected version 7.3.8 - implement logging of events: colour change, first crack start/end, second crack start/end, roast end user can select one of those events with the - and + buttons when the display shows 'Press > now to log first crack' version 7.3.7 - fix watchdog timer issue (timeout was 4sec for 4sec process causing rare spurious watchdog alarms) - always turn on in ready mode (instead of staying in timer mode if user has put it into timer mode) version 7.3.6 - 'heat too fast' detection modified to avoid false alarms with unusual profile curves that start out flat for the first few seconds - fix small bug in preheat power calculation for profiles that call for a different amount of power from the default 1050W (this will affect some profiles when roasting in an environment below 15 deg or above 25 deg, although the effect is tiny) - replace text of 'Supply V is x% of recommended with 'Supply V may be low ...' (reduces confusion between voltage and power) - ensure ambient temperature is reset to default during resetting (avoids some obscure minor mis-calculation of power requirements in edge cases) - perform some startup tests in a different order to provide better testing during the manufacturing process (no effect on the user) version 7.3.5 - 'heat too slow' detection modified to avoid false alarms - improve USB timeout settings to avoid reported memory stick issues - skip system and hidden files when loading profiles - allow zero-length short names - log the calibration data - suppress 'calibration reqd' message for Pledge Me machines (updater v 3 and 4) - don't reset level when entering calibration mode - fix small bug in string handling for version strings (trivial) - enhanced error reporting for USB to help debug memory stick problems version 7.3.4 - implement calibration of voltage and fan speed including calibration mode for setting these values - fix bug where update message was interfering with restoring default profile