I bought a HPDL1414 display, which easily can be put directly 1:1 onto a Arduino Pro Micro. The result is a nice compact "package".
Not-so-nice sideeffect is: The pins of hw I2C bus is used for simple GPIO tasks to drive the display.
Since I want to add an RTC DS3231 to this setup I now need to bitbang I2C somehow.
Is there known a bitbang capable DS3231 library or another setup to combine an DS3231 library
with another bitbanging library somehow?