I have a complex working code base running well on boards version 1.0.0 - the moment I update to board definition 1.0.1, the I2C subsystem seems to be completely unstable - using RTC or EEPROM - there a random lockups and unpredictable operations.
I have used two diferent I2C libraries for the eeprom with similar results on board version 1.0.1 - those same libraries work corectly on boards 1.0.0
Has anyone else seen this behaviour - my topboard is v.17-3117
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