Critical bug fix - firmware release 7.3.13

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Critical bug fix - firmware release 7.3.13


Post by kaffelogic » Wed 01 Apr, 2020 3:50 pm

A bug has been identified that prevents the Nano 7 from correctly calculating ROR after it has been on continuously for more than 90 mins.

If you turn the roaster off between roasts, or if you complete all of your roasts within 90 mins, this will not affect you.

It has only become an issue because, with the release of version 7.3.12, it became easy to leave the roaster on between roasts. If you upgraded to version 7.3.12 it is recommended that you now upgrade to 7.3.13.

If you are using an earlier version (7.3.10 or earlier) no action is required.

If you are a beta tester, there are now new versions of the beta firmware with the 90-min bug fixed.

Official release 7.3.13 at

Beta versions at ... M99T-ccOit. Version 7.4.3 is the stable beta with extended cool down, and version 7.4.4 contains a development version of the new power profiling feature.