Help with IoT water flow monitoring schematic

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4

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  1. The C1 connection makes no sense at all, and should go from VO to GND. F1 is not needed. From the regulator data sheet:

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  1. The circuit appears to connect a 5V sensor output with a 3.3V input. A logic level shifter is required. A 1K;2K resistor divider will work. Perhaps the flow sensor will work on 3.3V, in which case drop the boost converter.
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