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+====== WIO-CAN Wireless MBUS/CBUS interface. ======
+[[english|{{  rocrail-logo-35.png}}]]
+  * [[:hardware-en|GCA Hardware]]
+    * [[:hardware-en#wio|GCA WIO]]
+    * [[:wio:firststeps-en|WIO First steps]]
+ \\
+^Copyright Rob Versluis and Peter Giling^
+{{ :gca:wio_can_pict04.png?200|}}{{  :gca:wio_CAN_pict03.jpg?200|}}{{ :gca:wio_can_pict01.jpg?200|}}
+\\
+====== Description ======
+WIO-CAN has multiple functions.
+Together with **MS2 Railbox** from Märklin it connects Rocrail with the Railbox via wifi.\\
+Please note: the use of MS1 is NOT possible!\\
+WIO-CAN is also an interface between Rocrail(WIFI) and CBUS.\\
+Rocrail has implemented this inside the WIO concept.\\
+It fits complete inside a Märklin Railbox, even with the optional display.\\
+The unit uses the internal 18Vdc supply in the railbox.\\
+This rather high Voltage makes it impossible to use a standard linear voltage regulator.\\
+Therefore a switching regulator R78E-5 is used.\\
+====== Hardware ======
+^  WIO-CAN  ^^
+|  {{ :gca:wio_can_sch.pdf }}  |  Schematic  |
+|  {{ :gca:wio_can_pcb.pdf }}  |  pcb and part positions  |
+|  {{ :gca:wio_can_parts.pdf }}  |  bill of materials  |
+\\
+====== Connections ======
+Connections are also indicated near J1 on pcb..\\
+^  J1  ^^
+|  Pin  |  Function  |
+|  1  |  +V  |
+|  2  |  CANL  |
+|  3  |  CANH  |
+|  4  |  GND  |
+\\
+===== Further info =====
+Since this board is using same firmware as other WIO related units, the complete concept\\
+is explained in one page.
+[[  https://wiki.rocrail.net/doku.php?id=arduino:wio-en  ]]