Some more work have been done lately and i have now fabricated a couple of boards that will be sent out to some beta testers.
Features that exists in this version of the board is:
- Current Ethanol % and Temperature readings from within the App.
- Min/Max Ethanol % readings are stored in EEPROM which means that those will be stored and updated even if the computer/phone isn't connected.
- Settable "failsafe" voltage (contaminated fuel, broken ethanol sensor) from within the App.
- The "pullup" voltage can now be controlled from within the App, which means that this board can be used as a standalone device or connected in parallel to an existing ECA as shown in the previous connection diagram without needing to solder/desolder the jumper on the PCB.
I still have a couple of boards available that i will be able to ship in a few weeks once i know that the beta testers are satisfied with the tests. - So let me know if you are interested.
Images show the finished board, the windows app and the android app. The layout in the Android app will be reworked in the upcoming weeks. Also, don't bother about the incorrect % reading since this was due to the signal generator used when testing: