diff --git a/.vscode/launch.json b/.vscode/launch.json
index 2c45abc..7c46088 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -8,8 +8,8 @@
       "args": [],
       "stopAtEntry": false,
       "externalConsole": true,
-      "cwd": "d:/Git/ESPMegaPRO-v3-SDK/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO",
-      "program": "d:/Git/ESPMegaPRO-v3-SDK/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/build/Debug/outDebug",
+      "cwd": "d:/Git/ESPMegaPRO-v3-SDK/ESPMegaPRO-OS-SDK/src",
+      "program": "d:/Git/ESPMegaPRO-v3-SDK/ESPMegaPRO-OS-SDK/src/build/Debug/outDebug",
       "MIMode": "gdb",
       "miDebuggerPath": "gdb",
       "setupCommands": [
diff --git a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp
index 346a322..db469b0 100644
--- a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp
+++ b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp
@@ -14,9 +14,14 @@ void CurrentTransformerCard::bindFRAM(FRAM *fram, uint32_t framAddress)
     this->framAddress = framAddress;
 }
 
-void CurrentTransformerCard::begin()
+bool CurrentTransformerCard::begin()
 {
+    // Is analogCard a nullptr?
+    if (this->analogCard == nullptr) {
+        return false;
+    }
     this->beginConversion();
+    return true;
 }
 
 void CurrentTransformerCard::loop()
diff --git a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp
index 915889f..9dfa44a 100644
--- a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp
+++ b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include <AnalogCard.hpp>
+#include <ExpansionCard.hpp>
 #include <FRAM.h>
 #include <map>
 
@@ -10,12 +11,12 @@
  * Also supports storing energy to FRAM.
  */
 
-class CurrentTransformerCard
+class CurrentTransformerCard : public ExpansionCard
 {
     public:
         CurrentTransformerCard(AnalogCard* analogCard, uint8_t pin, float *voltage, std::function<float(uint16_t)> adcToCurrent, uint32_t conversionInterval);
         void bindFRAM(FRAM *fram, uint32_t framAddress); // Takes 16 bytes of FRAM (long double energy)
-        void begin();
+        bool begin();
         void loop();
         void beginConversion();
         void setEnergy(float energy);