Add and test CO2 sensors others than SCD30 and SCD4x

[melkati]

TODO

• [x] Include in menu the selection for CO2 sensors others than SCD30 and SCD4x
• [x] Save sensor selection to preferences (NVR)
• [x] Include the necessary logic lo support sensor selection (including serial connected sensors)
• [X] Test SCD30 Sensor
• [X] Test SCD41 Sensor
• [x] Test MHZ19 Sensor
• [X] Test CM1106 Sensor
• [X] Test SENSEAIRS8 Sensor
• [x] Document sensor selection on blog page

[freddujour]

Hi,

I have successfully tested the MHZ19 sensor. Found out how to proceed by modifying CO2_Gadget_Sensors.h Changing line 74 with : sensors.init(sensors.Mhz19);

Keep going, it is a very nice project.

[melkati]

Hi Frédéric.

Thank you very much. :-)

You don't need to modify the source code to select different sensors.

Just:

• Compile and flash with code in Feature-Select-CO2-Sensor branch

• Go to menu Configuration -> CO2 Sensor and select option "CO2 Sensor" now you can select the sensor with "Enter" (long press upper button on TTGO T-Display of from the serial console with key "*").

After each "Enter" give CO2 Gadget some time to try to init the sensor (one-two seconds), you will notice the menu unresponsive during this time. This is something I want to improve before releasing this feature.

Done!

I'll merge this feature in master branch as soon as I make some improvements (as the delay in menu) and do some more tests.

You are more than welcome to test this branch as I already tested this feature with Senseair S8 and Cubic CM1106 but not with MH-Z19. Thank you!

[melkati]

Released as v0.5.001

• Add support for serial CO2 Sensors as MH-Z19(A/B/C/D), CM1106, Senseair S8
• Reworked menu system to make it easier to select sensors and avoid delays while selection
• WiFi privacy defined by default (it doesn't show passwords in menu or serial terminal)
• Lots of fixes and improvements

@freddujour