diff --git a/include/sdrutils.hpp b/include/sdrutils.hpp
index 89b64ac..8969bd6 100644
--- a/include/sdrutils.hpp
+++ b/include/sdrutils.hpp
@@ -121,7 +121,7 @@
 
     sensorNumMapPtr = std::make_shared<SensorNumMap>();
 
-    uint8_t sensorNum = 1;
+    uint8_t sensorNum = 0;
     for (const auto& sensor : *sensorTree)
     {
         sensorNumMapPtr->insert(