diff --git a/esp32_node_temp/main/config_sensors.h b/esp32_node_temp/main/config_sensors.h
index 7f72eaf..eb8e0db 100644
--- a/esp32_node_temp/main/config_sensors.h
+++ b/esp32_node_temp/main/config_sensors.h
@@ -1,6 +1,7 @@
 #ifdef __CONNFIG_SENSORS_H__
 #define __CONFIG_SENSORS_H__
 
+// I2C configuration
 #define I2C_MASTER_SCL_IO               22          /*!< GPIO number used for I2C master clock */
 #define I2C_MASTER_SDA_IO               21          /*!< GPIO number used for I2C master data  */
 #define I2C_MASTER_NUM                  I2C_NUM_0   /*!< I2C port number for master dev */