diff --git a/src/chargercan.cpp b/src/chargercan.cpp
index e20d901..eed043d 100644
--- a/src/chargercan.cpp
+++ b/src/chargercan.cpp
@@ -100,6 +100,17 @@ void ChargerCAN::MapMessages(CanMap* can)
    can->AddSend(Param::idc, 0x109, 24, 16, 1);
    can->AddSend(Param::opmode, 0x109, 40, 3, 5); //Set charging and connlock at once
 
-   /***** Auxiliary TX *****/
-   can->AddSend(Param::uaux, 0x210, 0, 8, 10); //12V aux battery: byte 0, gain=10 (0.1V/decivolts, SKUDAK-448)
+   /***** SKUDAK VCU telemetry (0x210) — SKUDAK-448 expanded charger telemetry *****/
+   // Byte 0:    state (0=Off, 1=WaitStart, 2=Enable, 3=Activate, 4=Run, 5=Stop)
+   // Bytes 1-2: udc (V, gain=1)
+   // Bytes 3-4: idc (0.1A, gain=10)
+   // Byte 5:    uaux (decivolts, gain=10) — 12V aux battery rail
+   // Byte 6:    soc (%, gain=1)
+   // Byte 7:    reserved
+   // Consumed by stm32-hal-vcu Core/Src/main.c CHARGER_CAN_ID_OI_OBC_AUX handler.
+   can->AddSend(Param::state, 0x210,  0, 8,  1);
+   can->AddSend(Param::udc,   0x210,  8, 16, 1);
+   can->AddSend(Param::idc,   0x210, 24, 16, 10);
+   can->AddSend(Param::uaux,  0x210, 40, 8,  10);
+   can->AddSend(Param::soc,   0x210, 48, 8,  1);
 }