diff --git a/include/param_prj.h b/include/param_prj.h
index 262d41e..6731ea7 100644
--- a/include/param_prj.h
+++ b/include/param_prj.h
@@ -124,7 +124,10 @@
 #define CAT_CHARGER  "Charger"
 #define CAT_COMM     "Communication"
 
-#define VERSTR STRINGIFY(4=VER)
+// SKUDAK customization suffix: bump on every Skudak-side change so the OpenInverter
+// web UI shows a distinct version (e.g. "4=1.19.R-S1") and we can visually confirm
+// the right firmware is flashed. Match the stm32-sine -S<N> convention.
+#define VERSTR STRINGIFY(4=VER-S1)
 
 /***** enums ******/
 
diff --git a/src/chargercan.cpp b/src/chargercan.cpp
index eed043d..f289c29 100644
--- a/src/chargercan.cpp
+++ b/src/chargercan.cpp
@@ -100,7 +100,7 @@ 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
 
-   /***** SKUDAK VCU telemetry (0x210) — SKUDAK-448 expanded charger telemetry *****/
+   /***** SKUDAK VCU telemetry (0x211) — 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)
@@ -108,9 +108,9 @@ void ChargerCAN::MapMessages(CanMap* can)
    // 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);
+   can->AddSend(Param::state, 0x211,  0, 8,  1);
+   can->AddSend(Param::udc,   0x211,  8, 16, 1);
+   can->AddSend(Param::idc,   0x211, 24, 16, 10);
+   can->AddSend(Param::uaux,  0x211, 40, 8,  10);
+   can->AddSend(Param::soc,   0x211, 48, 8,  1);
 }