UNO sensors on A4 & A5 plus a serial display ...?

Hi,

I am adapting my 4wd robot to use 3 ultrasonic sensors rather than the servo mounted sensor. I also have an LCD display outputting all sensor readings so I can see whats happenning visually while I develop my code.

My problem is when I connect A4 & A5 the arduino freezes.

My research has indicated that the serial lcd pins scl & sca are shared with A4 & A5 on the uno, does this mean there is no way to use A4 & A5 in a sensor and the I2C bus at the same time?

Is my only option to go up to a larger arduino?

Thanks, Phil.

does this mean there is no way to use A4 & A5 in a sensor and the I2C bus at the same time?

Yes, it does.

Is my only option to go up to a larger arduino?

No. You could use a serial LCD instead.