I examined the waveforms.
When Scanner starts, SDA goes from HIGH to LOW and waits for SCL to go LOW, but SCL remains HIGH and does not change.
There seems to be a problem with Wire.begin() of I2C_Scanner.
I examined the waveforms.
When Scanner starts, SDA goes from HIGH to LOW and waits for SCL to go LOW, but SCL remains HIGH and does not change.
There seems to be a problem with Wire.begin() of I2C_Scanner.