V2 Release Candidate #6

[DeeEmm]

Bugfix Release

RC6 is a development release that addresses a number if bugs and adds a bunch of features. The biggest changes relate to the browser GUI and the inclusion of a data-graph tab. This allows the user to save lift data and view it in the browser in the form of a lift plot. The lift plot can be saved to the users local device as a PNG image. Lift data can also be saved in JSON format for import into other programs such as Excel.

MAF Data handling has been revised and updated and a new MAF Data file added for the Bosch 0280218067 sensor from the AUDI RS4 which supports up to 880cfm. The MAF Data files have also been updated from new source data for both the LS2 ACDELCO 92281162 sensor and the BMW M54B30 SIEMENS 5WK9605 sensors. This should improve the accuracy of both of those sensors

This release is our sixth release candidate and is fully functional code that is released with the intention of peer testing. Once the peer testing process has finished and any bugs addressed, the final release candidate will become the official V2.0 release.

The feature-set for V2 is now locked.

The main focus of units tests is now accuracy and repeatability.

Please note that the recommended board is the Wemos D1 R32. At present the system is designed to be used with DIY electronics. Work is currently underway to finalise the shield.

Build #         - Description of Change

23041301        - Added graph image capture
                - General code tidy
23041202        - Added adjustment for humidity and ref pressure to CFM Calc
23041201        - Updated MAf conversion code
                - Implimented simplified Mass flow to CFM conversion
                - Updated ACDELCO_92281162 MAF Data
23041102        - Changed 'Save Data' button test to 'Capture'
23041101        - Basic lift data handling finalised
23041001        - Increased loop task size in platformio
23040901        - Fixed error with MPXV7025 info display
                - Fixed error with MPXV7025 transfer function
                - Fixed error with MAF Data scaling
23040601        - Added lift data handling
                - liftdata.json file management in spiffs
                - liftdata.json export via WebGUI
23040402        - Updated GUI Graph data handling
23040401        - Added updated SIEMENS_5WK9605 MAF Data file
23040302        - Added GUI handling for MAF diameter
23040301        - Added support for Bosch 0280218067 MAF
                - Added transfer function for MAF housing diameters
                - Removed Siemens 5WK9605 MAF Data
23033101        - Added diameter var to MAFData files
23033001        - Added yml template for Support forum Posting Guidelines
23032901        - Added support for MPXV7025 pressure sensor
23030801        - Created code to generate lift plot from custom XML element (data array)
23030701        - Created basic lift graph
                - Fixed mafData file extensions in configuration.h
23030601        - Added Dataview layout
                - Added basic SD handling
23030202        - Added ability to change bench type in GUI
                - Fixed AP Mode IP address display in GUI
23030201        - Updated calibration code for flow and leaktest calibration
                - Added CERN-OSH-W license for Hardware
                - Updated Hardware BOM
23022801        - Reformatted data tiles to include swirl
                - Added swirl function
23022501        - Added support for XGZP6899A007 and XGZP6899A010 pressure sensors
23022401        - Decreased task update rates to address message queue overload
                - Updated README
23022301        - Trunate fractional part of lift interval if interval is intval
23022201        - Reverted temporary swap of Pdiff / Pref Analog channels
                - Added Data save and Data view modal dialogs 
23021601        - Code Tidying

Code installation and use is documented in the WIKI

Validation testing for code operation and functionality is ongoing.

If updating from previous versions, please upload the new index file, it includes all of the changes for the data graph tab including saving and exporting data. You should also update your platformio file as well as there is a change to the stack size for the loop task.

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This discussion was created from the release V2 Release Candidate #6.

[DeeEmm]

Small non-zero values for MAF / CFM noted by @black-top in this discussion

I suspect possible artefacts from typecast conversion between variable types (int / double / float). I've previously noted artefacts in small fractional part of values (0.00000XX). This results in zero values becoming non-zero values which generates non-zero outputs from conversion functions. The deviation is to the order of 0.15% for the resultant CFM value, which I feel is acceptable and is easily tuned out by the use of the TRIM_POT adjustments in configuration.h. However I have added an action to the V3 roadmap to add a Zero-Point calibration for all sensors so that this can be undertaken automatically.