v3.0.1

v3.0.1 is started!
NOTE: This version is the lost version.
After this version was published, it was noticed that there were some deficiencies and the update continued without creating a zip file, so the codes for this version were lost. The codes here belong to v3.0.0.

v2.0.1

v2.0.1 is started!
NOTE: This version is the lost version.
After this version was published, it was noticed that there were some deficiencies and the update continued without creating a zip file, so the codes for this version were lost. The codes here belong to v2.0.0.

v1.0.0

v1.0.0 is started!
NOTE: This version is the lost version.
While the library was being published, v1.0.1 was released because there was a problem with the v1.0.0 pull requests.

v5.3.0

Updates v5.3.0:

1) Fixed the problem with xmin, xmax, ymin, ymax, zmin, zmax settings in 4DSlope.py.

2) Cleaned extra spaces in ModelSensor.py and ModelGraph.py.

3) Added the ability to create DataReport.txt alongside EstimationReport.txt to 4DSlope.py.

The libraries were divided into five different subgroups in v5.0.0:

1) MQ series gas sensor library

2) TGS series gas sensor library

3) MG811 gas sensor library

4) SP3S-AQ2 gas sensor library

5) Geiger Counter library

This library was customized for MQ series gas sensors!

v5.1.5

Updates v5.1.5:

1) Improved the appearance of formulas in the README.md file.

2) A table was created in the README.md file to introduce other libraries.

3) Cleaned up comments in the library Curves.py.

4) Additional sentence added to library.properties, All_Supported_MQ_Sensors.ino, UnSupported_MQ_Sensors.ino, and ProjectHub.ino in the library.

5) Updated links on github also updated in comments: All_Supported_MQ_Sensors.ino and ProjectHub.ino.

5) Fixed bad display caused by missing enter in GasSensor.cpp.

6) Removed unused unnecessary code variables in ModelSlope.py and ModelGraph.py.

The libraries were divided into five different subgroups in v5.0.0:

1) MQ series gas sensor library

2) TGS series gas sensor library

3) MG811 gas sensor library

4) SP3S-AQ2 gas sensor library

5) Geiger Counter library

This library was customized for MQ series gas sensors!

v5.1.0

Updates v5.1.0:

1) The long method we used in the code to calculate the endpoints in 4DSlope.py has been made more practical by making it shorter.

2) EstimationReport.txt creation feature has been added to 4DSlope.py to save all results.

3) Estimation results were also included in readppm.py.

4) EstimationReport.txt creation feature has been added to also readppm.py.

The libraries were divided into five different subgroups in v5.0.0:

1) MQ series gas sensor library (August 26, 2025)

2) TGS series gas sensor library (September 10, 2025)

3) MG811 gas sensor library (August 30, 2025)

4) SP3S-AQ2 gas sensor library (September 3, 2025)

5) Geiger Counter library (August 26, 2025)

This library was customized for MQ series gas sensors!

v5.0.0

The libraries were divided into five different subgroups:

1) MQ series gas sensor library

2) TGS series gas sensor library

3) MG811 gas sensor library

4) SP3S-AQ2 gas sensor library

5) Geiger Counter library

This library was customized for MQ series gas sensors!

v4.5.1

Fixed ppm reading error caused by incorrect correction coefficient definition on model gases in data.js file.

v4.5.0

1) Added MQ306A and MQ216 gas sensor support.

2) Updated MQ9's correction coefficient by increasing it by 1 layer.

3) Fixed minor bug in regression calculations on MQ303A and MQ303B.

4) Error-free gases have also been updated for regression calculations on MQ303A and MQ303B.

5) Developed MQ306A's ethanol gas exception calibration method.

6) Fixed compilation code error in 4D_Slope.py.

v4.2.5

1) Added isMQSensor() function from ino to cpp

2) ProjectHub file fully created

3) All examples in the library were tested

NOTE: After long updates, this version is the matured version of the v4 series.

NOTE: Starting from this mature version, you can report any errors received to the "issues" section and send your contributions to the library from the "Pull Request" section