Just a short question: The iRobot Create 2 Open Interface spec says:

Serial sequence: [167] [Days] [Sun Hour] [Sun Minute] [Mon Hour] etc.

Can somebody explain to me, what "Days" stands for?

  • $\begingroup$ Can you provide more information? What is this? A vacuum cleaner, industrial welder, PLC? Manufacturer, model number? Can you link to a manual? $\endgroup$
    – Chuck
    Commented Jan 2, 2016 at 2:28
  • $\begingroup$ This looks like Roomba programming. I know the days byte is an 8-bit character where each bit represents a day of the week (high bit reserved). There are many Roomba programming sites available and suggest you look there - I am sure there are detailed instructions because of the way they allowed that interface to be open. $\endgroup$
    – SteveO
    Commented Jan 2, 2016 at 3:18
  • $\begingroup$ Here is one: joshbillions.org/post/410626127/… $\endgroup$
    – SteveO
    Commented Jan 2, 2016 at 3:20

1 Answer 1


of course, it is a roomba create 2. sorry for this..

The last comment helped: the requested variable stands for: the sum of days of a week, the roomba is meant to work.

Value Day: 1 Sunday, 2 Monday, 4 Tuesday, 8 Wednesday, 16 Thursday, 32 Friday, 64 Saturday

Examples: 127 = every day, 40 = Wednesday and Friday

Thank you! :)


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