Fix bug in startup battery check

The battery gauge was being checked before it was marked as online. Dummy values were returned, causing the low battery check to inaccurately pass. This would lead to very low voltage units into a rolling reset if voltage was too low.

Author: nseidle

Firmware/RTK_Surveyor/Begin.ino

@@ -544,6 +544,8 @@ void beginFuelGauge()
     return;
   }
 
+  online.battery = true;
+
   //Always use hibernate mode
   if (lipo.getHIBRTActThr() < 0xFF) lipo.setHIBRTActThr((uint8_t)0xFF);
   if (lipo.getHIBRTHibThr() < 0xFF) lipo.setHIBRTHibThr((uint8_t)0xFF);
@@ -553,7 +555,7 @@ void beginFuelGauge()
   checkBatteryLevels(); //Force check so you see battery level immediately at power on
 
   //Check to see if we are dangerously low
-  if (battLevel < 5 && battChangeRate < 0) //5% and not charging
+  if (battLevel < 5 && battChangeRate < 0.5) //5% and not charging
   {
     Serial.println("Battery too low. Please charge. Shutting down...");
 
@@ -565,7 +567,6 @@ void beginFuelGauge()
     powerDown(false); //Don't display 'Shutting Down'
   }
 
-  online.battery = true;
 }
 
 //Begin accelerometer if available