Nodemcu of gpio4,5 for scl and sda,how can it be reset?

Using Arduino Project Guidance
1

it shows zero values unless replug connecting wire between nodemcu and sensor,

2

Posted in the wrong place. I moved it here. Try and be more careful where you post in future.

1 Like
3

That's normal without pullup resistors on SCL and SDA. Add resistors to the pins if you want to use I2C without pullup resistors on other devices.

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