Can you please share schematic diagram and information about POT on the board.

Thanks - I think it ended up being an issue of minimum range for this sensor so I switched to another one that is working better.

I have just received this item and the distance readings show zero using the code in the Wiki page (and mindful of the below comment about setting echoPin to HIGH...any suggestions?

hello ,
does this sensor has temperature correction because i heard that distance is influenced by humidity and temperature?

Can you drive the trigger input with a 3.3v signal instead of 5v logic ?