diff --git a/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c b/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
index 306bd5e6b..f34dc8ed4 100644
--- a/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
+++ b/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
@@ -20,6 +20,8 @@
 #include "config.h"
 
 static const char *TAG = "esp32 node";
+
+// The three variables for storing the sensor readings (float for decimals)
 float temperature = 0.0f, humidity = 0.0f, pressure = 0.0f;
 
 int i2c_master_port = 0;