Some I2C chips are detected by reading a POR (power-on-reset) value from a control register. There is a risk that this fails after a (non powercycle) reset, if a device's software modified the control register of the chip (e.g. DS3231) after inital power on.
Some I2C chips are detected by reading a POR (power-on-reset) value from a control register. There is a risk that this fails after a (non powercycle) reset, if a device's software modified the control register of the chip (e.g. DS3231) after inital power on.