diff --git a/src/CANode.cpp b/src/CANode.cpp
index 3e4aacd..c4d68a7 100644
--- a/src/CANode.cpp
+++ b/src/CANode.cpp
@@ -13,6 +13,7 @@
 #include <Metro.h>
 #include <FlexCAN.h>
 #include <OneWire.h>
+#include "CANode.h"
 // Configurations
 // Misc
 #define DEBUG 0
diff --git a/src/CANode.h b/src/CANode.h
new file mode 100644
index 0000000..c2a9c41
--- /dev/null
+++ b/src/CANode.h
@@ -0,0 +1,14 @@
+#include <Arduino.h>
+
+typedef struct CAN_telegram {
+  uint32_t id;
+  uint8_t len;
+  uint8_t buf[8];
+} CAN_telegram;
+
+typedef struct OW_switch {
+  uint8_t nick;
+  uint8_t addr[8];
+  uint8_t last_state;
+//  CAN_telegram event[2];
+} OW_switch;