Implement a single source file for the following:
* mq2: H2/LPG/CH4/CO/alcohol/smoke/propane/etc
* mq3: Alcohol/benzine/CH4/hexane/LPG/CO
* mq4: CNG (mostly methane)
* mq5: H2/LPG/CH4/CO/alcohol
* mq6: LPG (mostly propane/butane)
* mq7: CO
* mq8: H
* mq9: CO/CH4/LPG
The documentation for these sensors notes that they do not read an exact
gas concentration. Some of the sensors have examples for how to
calibrate with a 'clean air environment' for outputing ppm, but this is
not the case for all mqx sensors. Because of this, the output can be
read as a normalized output (0.0->1.0), raw volts (normalized * aRef),
or a scaled/offset voltage.
Signed-off-by: Noel Eck <noel.eck@intel.com>
To make room for UPM C and C++ sensor code to coexist, all UPM
C++ headers have been renamed from h -> hpp. This commit contains
updates to documentation, includes, cmake collateral, examples, and
swig interface files.
* Renamed all cxx/cpp header files which contain the string
'copyright intel' from .h -> .hpp (if not already hpp).
* Replaced all references to .h with .hpp in documentation,
source files, cmake collateral, example code, and swig interface
files.
* Replaced cmake variable module_h with module_hpp.
* Intentionally left upm.h since this file currently does not
contain code (documentation only).
Signed-off-by: Noel Eck <noel.eck@intel.com>
