Websocket connection

firmware/lib/session/SessionManager.h

@@ -8,6 +8,8 @@ template <typename SessionT>
 class SessionManager
 {
 public:
+    using MeasurementType = typename SessionT::MeasurementType;
+    
     SessionManager(int scaleDoutPin, int scaleSckPin, uint8_t tareAvgCount);
 
     void begin();

firmware/lib/session/SimpleMeasurementSession.h

@@ -7,7 +7,7 @@ class SimpleMeasurementSession
 {
 public:
     using ChunkT = SessionChunk<Measurement_T, MAX_SIZE>;
-
+    using MeasurementType = Measurement_T;
     // save interval in number of measurements (by default every minute)
     SimpleMeasurementSession(uint32_t saveInterval = 10 * 60)
         : chunk(nullptr), saveInterval_(saveInterval)
@@ -66,6 +66,11 @@ public:
         encoder.sendArray(chunk->getDataPointer() + startIdx, numElementsToSend);
     }
 
+    Measurement_T *getDataPointer()
+    {
+        return chunk->getDataPointer();
+    }
+
 private:
     void saveToFileSystem()
     {