firmware/src/power.h

#pragma once
#include "concurrency/PeriodicTask.h"
#include "PowerStatus.h"

/**
 * Per @spattinson
 * MIN_BAT_MILLIVOLTS seems high. Typical 18650 are different chemistry to LiPo, even for LiPos that chart seems a bit off, other
 * charts put 3690mV at about 30% for a lipo, for 18650 i think 10% remaining iis in the region of 3.2-3.3V. Reference 1st graph
 * in [this test report](https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-30Q%203000mAh%20%28Pink%29%20UK.html)
 * looking at the red line - discharge at 0.2A - he gets a capacity of 2900mah, 90% of 2900 = 2610, that point in the graph looks
 * to be a shade above 3.2V
 */
#define MIN_BAT_MILLIVOLTS 3250 // millivolts. 10% per https://blog.ampow.com/lipo-voltage-chart/

#define BAT_MILLIVOLTS_FULL 4100
#define BAT_MILLIVOLTS_EMPTY 3500

class Power : public concurrency::PeriodicTask
{

   public:

    Observable<const meshtastic::PowerStatus *> newStatus;

    void readPowerStatus();
    void loop();
    virtual bool setup();
    virtual void doTask();
    void setStatusHandler(meshtastic::PowerStatus *handler)
    {
        statusHandler = handler;
    }
    
   protected:
    meshtastic::PowerStatus *statusHandler;
    virtual void axp192Init();

};

extern Power *power;