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1. This guide describes how to set up the RTC function on [[X728]] and [[X729]] shield, we only tested it on Raspberry Pi OS.
2. Since different modules may use different clock ICs, there may be slight differences in configuration, but for [[X728]] and [[X729]], they use the same clock IC. 3. You must enable I2C interface before enable RTC, refer to [[How to enable I2C]]