Experimental Physics and
Industrial Control System

On Mar 10, 2016, at 8:28 AM, Kevin Peterson <[email protected]> wrote:

I have a helium sensor that responds to a query with this reply:

 :80gv<VVVVVVVV><FFFFFFFF><CCCC><cr>

Where the non-constant parts of the response are ASCII hex characters
representing the following values:

 <VVVVVVVV> = (32 bit floating point) The current gas value
 <FFFFFFFF> = (32 bit unsigned integer) The sensor status
 <CCCC> = (16 bit unsigned integer) The message checksum

Is there a straightforward way to parse the floating point value using
StreamDevice format converters?

The raw double converter %R doesn't work, presumably because it is
interpreting the ASCII chars as bytes, rather than hex values.

The value can be read as an int with %08X, but it isn't obvious how to
then cast that value as a float.

Thanks,

Kevin

--
Kevin M. Peterson
(630) 252-8644
[email protected]