Hi
> after the address byte is sent, unfortunately this is always returned as a 0
> (ack accepted) whether or not a device is present. I don't understand how
> this could be, do other devices on the network send the ack even if they are
> not being addressed?? Has anyone sucessfully detected the ack sent by the
> LM75 (or other I2C device)? Am I understanding the concept of an ack
> properly? Just as an addition, I have made sure that the master is high
Yes, you are.
> during this time that ack should be sent. Thank you for any help. TTYL


Is't there an another device at same adress as the L75?
Do you use the correct pull up resistors?

Cheer George