Understanding PWR and CHG on a Xenon

Firmware
5

I used the following:

  pinMode(PWR, INPUT);
  pinMode(CHG, INPUT);

  charge = (digitalRead(PWR) && !digitalRead(CHG));  // 0 = Not Charging
  onBatteryPower = (!digitalRead(PWR));              // 0 = Not on Battery Power

Notes:

  • If a Solar Xenon’s charge cycle is interrupted, it wont resume charging until the Li-Po drops below 4.05V.
  • If both charge and onBatteryPower are “0”, the Panel is providing the operating current for the Xenon.
  • voltage = analogRead(BATT) * 0.0011224; will be incorrect under certain conditions.
  • This Thread has more details at the time (and firmware version) of my testing.