I am using sketch found in examples
I have wired according to this .
I have checked for continuity.All checks out
/* Connect SCL to analog 5
Connect SDA to analog 4
Connect VDD to 3.3V DC
Connect GROUND to common ground */
I have connected to 3.3 and 5v no change.
I am using a Mega 2650. Do I need to adjust the pin connections?
Yes. The SDA and SCL pins are Pin 20 and Pin 21 on the MEGA. On the Rev 3 UNO and MEGA they duplicated the SDA and SCL pins near Pin 13 so you could make a shield that could use Wire without having to know if it was plugged into an UNO or a MEGA. Try using those pins:
10 11 12 13 GND AREF SDA SCL
On the UNO those two pins are connected to A4 and A5. On the MEGA those two pins are connected to 20 and 21.
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