scubaben / mixmonitor Goto Github PK

one example: S1 can't be less than 21.

EEPROM commands should be their own class with a versioned data structure and migration ability so in future other parts of the program can utilize it, not just sensor class.

the feather uses a voltage divider on pin A9, which we can use to read the voltage of the rechargable battery pack.
https://learn.adafruit.com/adafruit-feather-32u4-basic-proto/power-management

sample code:
#define VBATPIN A9

float measuredvbat = analogRead(VBATPIN);
measuredvbat *= 2; // we divided by 2, so multiply back
measuredvbat *= 3.3; // Multiply by 3.3V, our reference voltage
measuredvbat /= 1024; // convert to voltage
Serial.print("VBat: " ); Serial.println(measuredvbat);

user inputs or chooses a predefined (10/50, 21/35, etc...) desired o2/he blend.

s2 target setting = desired o2
s1 target setting = desired o2/(1-desired he)
)target settings in decimal format)

need to have validations in place so that a user cannot input an impossible blend. s1 minimum should be .21

results should be used to update target settings

currently, MV readings are only shown while calibrating. it would be nice to have the option to see MV readings during analysis too.

Currently sensor class references global variables, so it is not possible to use it independent of the project... so it should be refactored to not do this.

(s1-s2)/s1 should work, where s1 is downstream of the o2 injection and s2 is downstream of o2 AND he injection.

there are a handful of new enhancements that will require new menus to configure. Clicking the button should first bring up a menu, and then allow the user to choose which settings they want to modify.

maybe something like:

• calibrate
• display theroretical HE
• turn cells on or off
• calculate blend
• set targets manually

right now you have to read from the eeprom each time you want to check to see if there is valid calibration. It would be nice to do this just once and then have that available for each of the functions that update the display.