esp32 temperature node

ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c

@@ -30,6 +30,7 @@ static i2c_bus_handle_t i2c_bus = NULL;
 // BME280 device handle
 static bme280_handle_t bme280 = NULL;
 
+// I2C bus configuration struct
 i2c_config_t conf = {
     .mode = I2C_MODE_MASTER,
     .sda_io_num = SDA_PIN,
@@ -40,7 +41,6 @@ i2c_config_t conf = {
     .clk_flags= 0,
 };
 
-
 void app_main(void)
 {
     i2c_bus = i2c_bus_create(i2c_master_port, &conf);