Release notes for Kaffelogic Nano 7 firmware

Current release version 7.3.13.1095 released 1 April 2020

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