If you search the Web for your Temperature sensor, you'll find lots of discussions about interfacing it with Arduino, noting that the sensor uses a "one-wire" protocol. Most of the implementations discuss the Arduino interface, noting that two Arduino library functions, "One Wire Library" and "Dallas Temperature.h" are recommended to handle the "one-wire protocol" that this particular chip uses.
You will probably need to develop your own library for implementing the one-wire protocol in the myRIO. Note that the myRIO is perfectly capable of handling communications protocols -- the myRIO Software Toolkit has functions that allow you to communicate with chips that use the SPI or I²C protocol. You can also "study the Protocol" and then "roll your own" code by utilizing the FPGA.
So the answer as to why VISA doesn't work is that you chose a chip that uses a "one-wire" communication protocol. Learn the protocol, then write a custom communication protocol for this device using the FPGA of the myRIO to handle the timing and the bit processing. Or get an Arduino.
Bob Schor
