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The T1 has an ICM-42607-P IMU with the same address as a DS3231 RTC. This completely breaks the clock on the T1. Reading the time results in a garbage value, causing all sorts of strange issues. The time never advances, which breaks logging in to repeaters (due to their time-based replay protection). This simply disables the probe on the I2C line. The DS3231 doesn't have a WHO_AM_I register that could be used to prevent misidentifying it, so this simpler fix is used.