diff --git a/include/scd4x_data.h b/include/scd4x_data.h
new file mode 100644
index 0000000..c8818e7
--- /dev/null
+++ b/include/scd4x_data.h
@@ -0,0 +1,17 @@
+#ifndef SCD4X_DATA_H
+#define SCD4X_DATA_H
+
+struct scd4x_data {
+	uint16_t co2;
+	int32_t temperature;
+	int32_t humidity;
+};
+typedef struct scd4x_data scd4x_data_t;
+
+struct scd4x_config {
+	scd4x_data_t* measure;
+	uint16_t delay;
+};
+typedef struct scd4x_config scd4x_config_t;
+
+#endif