diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index 39f230d1..0e16a3f3 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1292,6 +1292,17 @@ float CPhoneDevice::QueryBattaryVoltage(int timesForAvg, bool* isCharging)
     return (matched > 0) ? ((float)totalVals / 1000.0 / matched) : 0;
 }
 
+uint32_t CPhoneDevice::QueryLdr()
+{
+    int val = GpioControl::getLightAdc();
+    if (val > 0)
+    {
+        return static_cast<uint32_t>(val);
+    }
+
+    return 0;
+}
+
 bool CPhoneDevice::RequestPosition()
 {
     JNIEnv* env = NULL;
diff --git a/app/src/main/cpp/PhoneDevice.h b/app/src/main/cpp/PhoneDevice.h
index 0e100af1..b76fc0c1 100644
--- a/app/src/main/cpp/PhoneDevice.h
+++ b/app/src/main/cpp/PhoneDevice.h
@@ -235,6 +235,7 @@ public:
     virtual bool Reboot(int resetType, bool manually, const std::string& reason, uint32_t timeout = 1000);
 	virtual bool EnableGPS(bool enabled);
     virtual float QueryBattaryVoltage(int timesForAvg, bool* isCharging);
+    virtual uint32_t QueryLdr();
 	virtual bool RequestPosition();
     virtual timer_uid_t RegisterHeartbeat(unsigned int timerType, unsigned int timeout, time_t tsForNextPhoto);
 	virtual bool TakePhoto(const IDevice::PHOTO_INFO& photoInfo, const vector<OSD_INFO>& osds, const std::string& path);