diff --git a/firmware/sensors.ino b/firmware/sensors.ino
index 2123cfb..4fc5c14 100755
--- a/firmware/sensors.ino
+++ b/firmware/sensors.ino
@@ -63,10 +63,10 @@ float getBatteryVoltage() {
 }
 
 float isBatCharging() {
-  if (HIGH == digitalRead(BAT_CHARGED_PIN))
+  if (LOW == digitalRead(BAT_CHARGED_PIN))
   {
     return BAT_CHARGE_STATE_CHARGED;
-  } else if (HIGH == digitalRead(BAT_CHARGING_PIN))
+  } else if (LOW == digitalRead(BAT_CHARGING_PIN))
   {
     return BAT_CHARGE_STATE_CHARGING;
   }