Fixed scale tare

lib/basic/Dtypes.h

@@ -17,4 +17,4 @@ inline String toString(const T & t) {
     return String(t);
 }
 
-#define assert(EXPRESSION, MSG) ((EXPRESSION) ? (void)0 : _assert(#EXPRESSION, #MSG, __FILE__, __LINE__))
+#define assert_msg(EXPRESSION, MSG) ((EXPRESSION) ? (void)0 : _assert(#EXPRESSION, #MSG, __FILE__, __LINE__))

lib/basic/FilesystemAbstraction.h

@@ -0,0 +1,181 @@
+#pragma once
+
+#ifdef PLATFORM_ESP32
+#include "SPIFFS.h"
+
+namespace portablefs
+{
+    using File = ::File;
+
+    class Dir
+    {
+    public:
+        Dir() {}
+        Dir(const String &path)
+            : root_(SPIFFS.open(path))
+        {
+            //next();
+        }
+
+        bool next()
+        {
+            file_ = root_.openNextFile();
+            return file_;
+        }
+
+        bool isFile()
+        {
+            return !file_.isDirectory();
+        }
+
+        bool isDirectory()
+        {
+            return file_.isDirectory();
+        }
+
+        String fileName() const
+        {
+            return file_.name();
+        }
+
+        size_t fileSize() const
+        {
+            return file_.size();
+        }
+
+    private:
+        File root_;
+        File file_;
+    };
+
+    inline Dir openDir(const String &path)
+    {
+        return Dir(path);
+    }
+
+    inline File open(const char *name, const char *mode)
+    {
+        return SPIFFS.open(name, mode);
+    }
+
+    inline bool exists(const char *name)
+    {
+        return SPIFFS.exists(name);
+    }
+
+    inline bool remove(const char *name)
+    {
+        return SPIFFS.remove(name);
+    }
+
+    inline bool mkdir(const char *name)
+    {
+        return SPIFFS.mkdir(name);
+    }
+
+} // namespace portablefs
+
+#endif
+
+#ifdef PLATFORM_ESP8266
+
+#include <FS.h>
+
+namespace portablefs
+{
+    using Dir;
+} // namespace portablefs
+
+#endif
+
+#ifdef PLATFORM_NATIVE
+
+#include <string>
+#include <fstream>
+#include <filesystem>
+#include "MockDtypes.h"
+
+namespace fs = std::filesystem;
+
+
+namespace portablefs
+{
+    const std::string basePath = "./base";
+    
+    class Dir
+    {
+    public:
+        Dir() {}
+        Dir(const String &path)
+            : it_(fs::directory_iterator(path).begin()),
+              end_(fs::directory_iterator(path).end()),
+              firstIncremented_(false)
+        {
+        }
+
+        bool next()
+        {
+            if (!firstIncremented_)
+                firstIncremented_ = true;
+            else
+                ++it_;
+
+            return it_ != end_;
+        }
+
+        bool isFile()
+        {
+            return file.is_regular_file();
+        }
+
+        bool isDirectory()
+        {
+            return it_.is_directory();
+        }
+
+        String fileName() const
+        {
+            return it_.path().filename().string();
+        }
+
+        size_t fileSize() const
+        {
+            return it_.file_size();
+        }
+
+    private:
+        fs::directory_iterator it_;
+        fs::directory_iterator end_;
+        bool firstIncremented_;
+    };
+
+    inline Dir openDir(const String &path)
+    {
+        return Dir(path);
+    }
+
+    inline File open(const char *name, const char *mode)
+    {
+        if(mode == "r")
+            return fopen()
+        return SPIFFS.open(name, mode);
+    }
+
+    inline bool exists(const char *name)
+    {
+        return SPIFFS.exists(name);
+    }
+
+    inline bool remove(const char *name)
+    {
+        return SPIFFS.remove(name);
+    }
+
+    inline bool mkdir(const char *name)
+    {
+        return SPIFFS.mkdir(name);
+    }    
+
+} // namespace portablefs
+
+#endif

lib/basic/MockDtypes.h

@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <iostream>
 #include <sstream>
+#include <string>
 
 typedef uint32_t uint_t;
 
@@ -39,4 +40,7 @@ inline std::string toString(const T & t) {
     return stream.str();
 }
 
+class String : public std::string
+{};
+
 #define assert(EXPRESSION, MSG) ((EXPRESSION) ? (void)0 : _assert(#EXPRESSION, #MSG, __FILE__, __LINE__))

lib/scale/MockScale.h

@@ -4,14 +4,16 @@
 class MockScale
 {
 public:
-    MockScale( uint16_t valueMin=0, uint16_t valueMax=50)
+    MockScale( uint16_t valueMin=0, uint16_t valueMax=10)
         : valueMin_(valueMin), valueMax_(valueMax), currentValue_(valueMin), direction(1)
     {}
 
     bool measure(uint16_t & measurementOut) {
         currentValue_ += direction;
-        if ( currentValue_ >= valueMax_)
+        if ( currentValue_ >= valueMax_) {
             direction = -1;
+            valueMax_ += 2;
+        }
         else if ( currentValue_ <= valueMin_ )
             direction = +1;
 

lib/scale/Scale.h

@@ -1,4 +1,5 @@
 #include "HX711.h"
+#include "ConfigHardware.h"
 #include <cstdint>
 
 
@@ -9,8 +10,11 @@ public:
     bool measure(uint16_t & measurementOut) {
         if (hx711_.is_ready())
         {
-            uint32_t value = hx711_.get_value(MEASUREMENT_AVG_COUNT);
-            measurementOut = (int16_t)(value / DIVIDER);
+            long value = hx711_.read_average(CONFIG_MEASUREMENT_AVG_COUNT) - offset_;
+            if(value > 0)
+                measurementOut = (int16_t)(value / DIVIDER);
+            else
+                measurementOut = 0;
             return true;
         }
         else
@@ -22,9 +26,10 @@ public:
     };
 
     void tare(uint32_t numMeasurementsToAverage=50) {
-        hx711_.tare(numMeasurementsToAverage);
+        offset_ = hx711_.read_average(numMeasurementsToAverage);
     }
 
 private:
     HX711 hx711_;
+    long offset_ = 0;
 };

lib/session/MeasurementSession.h

@@ -23,7 +23,7 @@ public:
             Serial.println("Starting session rotate");
             rotate();
             const bool secondInsertSuccess = currentChunk->addPoint(measurement);
-            assert(secondInsertSuccess, "Session: insertion after rotation failed");
+            assert_msg(secondInsertSuccess, "Session: insertion after rotation failed");
             // TODO check that there is place for file - remove old files
         }
         return true;
@@ -52,7 +52,7 @@ public:
         encoder.template sendArrayHeader<Measurement_T>(lastIdx - startIdx);
         while(startIdx < lastIdx)
             startIdx = serializeChunk(encoder, startIdx);
-        assert(startIdx == lastIdx, "Not all data was sent");
+        assert_msg(startIdx == lastIdx, "Not all data was sent");
     }
 
     uint32_t getStartTime() const {
@@ -88,18 +88,18 @@ private:
 
     template< typename Encoder_T>
     uint32_t serializeChunk(Encoder_T & encoder, uint32_t startIdx) const {
-        assert( startIdx < currentChunk->getStartIndex() + currentChunk->numMeasurements(),
-                "serializeChunk: invalid startIdx" );
+        assert_msg( startIdx < currentChunk->getStartIndex() + currentChunk->numMeasurements(),
+                   "serializeChunk: invalid startIdx" );
 
         if( startIdx >= currentChunk->getStartIndex() ) {
             const auto localStartIdx = startIdx - currentChunk->getStartIndex();
             const auto numElements = currentChunk->numMeasurements() - localStartIdx;
-            assert(numElements <= currentChunk->numMeasurements(), "Internal problem in serializeChunk");
+            assert_msg(numElements <= currentChunk->numMeasurements(), "Internal problem in serializeChunk");
             encoder.sendArrayPartialContents( currentChunk->getDataPointer() + localStartIdx, numElements );
             return currentChunk->getStartIndex() + currentChunk->numMeasurements();
         } else if( startIdx >= otherChunk->getStartIndex() && otherChunkFilled() ) {
             encoder.sendArrayPartialContents( otherChunk->getDataPointer(), otherChunk->numMeasurements() );
-            assert( otherChunk->numMeasurements(), CHUNK_SIZE );
+            assert_msg( otherChunk->numMeasurements(), CHUNK_SIZE );
             return otherChunk->getStartIndex() + otherChunk->numMeasurements();
         } else {
             if( encoder.getSizeCountMode() ) {

lib/session/SpiffsStorage.h

@@ -1,7 +1,43 @@
 #pragma once
 #include "StreamingMsgPackEncoder.h"
-#include <FS.h>
+#include "FilesystemAbstraction.h"
 
+#ifdef USE_ESP32 
+
+struct WriterAdaptor 
+{
+    File * f;
+    void write(const char * ptr, size_t size) {
+        f->write(reinterpret_cast<const uint8_t *>(ptr), size);
+    }
+};
+
+class SpiffsStorageWriter {
+public:
+    SpiffsStorageWriter(const String &fileName) :
+            f_(SPIFFS.open(fileName, "w")),
+            adaptor_{&f_},
+            encoder_(&adaptor_),
+            fileName_(fileName)
+    {
+        bool success = f_;
+        Serial.println(success);
+    }
+    ~SpiffsStorageWriter() {
+        f_.close();
+        Serial.println(fileName_);
+        Serial.println(SPIFFS.exists(fileName_));
+    }
+    StreamingMsgPackEncoder<WriterAdaptor> &encoder() { return encoder_; }
+
+private:
+    File f_;
+    WriterAdaptor adaptor_;
+    StreamingMsgPackEncoder<WriterAdaptor> encoder_;
+    String fileName_;
+};
+
+#else 
 
 class SpiffsStorageWriter {
 public:
@@ -26,6 +62,11 @@ private:
     String fileName_;
 };
 
+#endif
+
+
+
+
 
 class SpiffsStorageReader
 {

lib/session/StreamingMsgPackEncoder.h

@@ -19,6 +19,7 @@ struct DummyWriter {
     void write(const void*, uint32_t) {}
 };
 
+
 class CopyWriter {
 public:
     CopyWriter(uint8_t * bufferToWrite)
@@ -193,8 +194,8 @@ public:
         uint32_t elementsToSkip = 0;
         if( sentBytes_ < offsetToStart_ ) {
             elementsToSkip = (offsetToStart_ - sentBytes_) / sizeof(T);
-            assert((offsetToStart_ - sentBytes_) % sizeof(T) == 0,
-                    "Looks like previous sent operation send fraction of an element.");
+            assert_msg((offsetToStart_ - sentBytes_) % sizeof(T) == 0,
+                       "Looks like previous sent operation send fraction of an element.");
         }
         if( elementsToSkip >= length) {
             sentBytes_ += sizeof(T) * length;
@@ -241,7 +242,7 @@ private:
         if( sentBytes_ < offsetToStart_ ) {
             // already sent
             sentBytes_ += sizeRequired;
-            assert( sentBytes_ <= offsetToStart_, "Partial sending not supported by this function" );
+            assert_msg( sentBytes_ <= offsetToStart_, "Partial sending not supported by this function" );
             return;
         }
 

lib/userdb/UserDB.cpp

@@ -0,0 +1,192 @@
+#include "UserDB.h"
+#include "FilesystemAbstraction.h"
+
+const String userDir = "/u/";
+
+template <class ForwardIterator, class T>
+ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last, const T &val)
+{
+    ForwardIterator it;
+    iterator_traits<ForwardIterator>::difference_type count, step;
+    count = distance(first, last);
+    while (count > 0)
+    {
+        it = first;
+        step = count / 2;
+        advance(it, step);
+        if (*it < val)
+        {
+            first = ++it;
+            count -= step + 1;
+        }
+        else
+            count = step;
+    }
+    return first;
+}
+
+static String userFileName(const String &userName)
+{
+    return userDir + userName;
+}
+
+bool User::load(const String &name)
+{
+    name_ = name;
+    assert(name_.length() > 0);
+    const auto fileName = userFileName(name_);
+    if (!portablefs::exists(fileName.c_str()))
+        return false;
+
+    auto file = portablefs::open(fileName.c_str(), "r");
+
+    size_t sessionsInFile;
+    file.read((uint8_t *)&sessionsInFile, sizeof(numSessions_));
+
+    init(name, sessionsInFile * 2);
+
+    size_t expectedSize = sizeof(SessionIdType) * numSessions_;
+    auto bytesRead = file.read((uint8_t *)sessionIds_, expectedSize);
+    numSessions_ = sessionsInFile;
+
+    assert(expectedSize == bytesRead);
+}
+
+void User::init(const String &name, size_t sessionAllocateSize)
+{
+    if (sessionIds_ != nullptr)
+    {
+        free(sessionIds_);
+        sessionIds_ = nullptr;
+    }
+    name_ = name;
+    numSessionsAllocated_ = sessionAllocateSize;
+    sessionIds_ = (SessionIdType *)ps_malloc(sizeof(SessionIdType) * numSessionsAllocated_);
+    numSessions_ = 0;
+}
+
+void User::save()
+{
+    if (!portablefs::exists(userDir.c_str()))
+        portablefs::mkdir(userDir.c_str());
+
+    auto file = portablefs::open(userFileName(name_).c_str(), "w");
+    file.write((uint8_t *)&numSessions_, sizeof(numSessions_));
+    file.write((uint8_t *)sessionIds_, sizeof(SessionIdType) * numSessions_);
+}
+
+void User::freeResources()
+{
+    if (sessionIds_ != nullptr)
+    {
+        free(sessionIds_);
+        sessionIds_ = nullptr;
+    }
+}
+
+void User::remove()
+{
+    portablefs::remove(userFileName(name_).c_str());
+    freeResources();
+    name_ = "";
+    numSessions_ = 0;
+    numSessionsAllocated_ = 0;
+}
+
+void User::growSessionArrayIfNecessary()
+{
+    assert(numSessions_ <= numSessionsAllocated_);
+
+    if (numSessions_ < numSessionsAllocated_)
+        return;
+
+    numSessionsAllocated_ *= 2;
+    sessionIds_ = (SessionIdType *)ps_realloc(sessionIds_, numSessionsAllocated_);
+
+    assert(numSessions_ < numSessionsAllocated_);
+}
+
+void User::insertSession(SessionIdType newSessionId)
+{
+    growSessionArrayIfNecessary();
+    assert(numSessionsAllocated_ > numSessions_);
+    SessionIdType *insertPos = lower_bound(sessionIds_, sessionIds_ + numSessions_, newSessionId);
+    const size_t moveStartIdx = sessionIds_ + numSessions_ - insertPos;
+    for (size_t i = numSessions_ - 1; i >= moveStartIdx; --i)
+        sessionIds_[i + 1] = sessionIds_[i];
+    sessionIds_[moveStartIdx] = newSessionId;
+    numSessions_ += 1;
+}
+
+bool User::removeSession(SessionIdType sessionIdToRemove)
+{
+    SessionIdType *removePos = lower_bound(sessionIds_, sessionIds_ + numSessions_, sessionIdToRemove);
+    const size_t removeIdx = sessionIds_ + numSessions_ - removePos;
+    if (sessionIds_[removeIdx] != sessionIdToRemove)
+        return false;
+
+    for (size_t i = removeIdx; i < numSessions_ - 1; ++i)
+        sessionIds_[i] = sessionIds_[i + 1];
+
+    numSessions_ -= 1;
+    return true;
+}
+
+// --------------------------------------------------------------------------------------------------------------------
+
+User *UserStorage::getUserInfo(const String &userName)
+{
+    // index 0 is the unassigned user
+    for (size_t i = 1; i < numUsers_; ++i)
+        if (users_[i].name() == userName)
+            return &users_[i];
+    return nullptr;
+}
+
+User *UserStorage::getUnassignedUser()
+{
+    return &users_[0];
+}
+
+User *UserStorage::addNewUser(const String &userName)
+{
+    if (numUsers_ >= MAX_USERS)
+        return nullptr;
+
+    auto userIdx = numUsers_;
+    numUsers_++;
+    assert(numUsers_ < MAX_USERS);
+    users_[userIdx].init(userName);
+}
+
+bool UserStorage::deleteUser(const String &userName)
+{
+    User *userPtr = getUserInfo(userName);
+
+    if (userPtr == nullptr)
+        return false;
+    size_t userIdx = userPtr - users_;
+    userPtr->remove();
+    assert(numUsers_ > 0);
+    if (userIdx != numUsers_ - 1)
+        users_[userIdx] = users_[numUsers_ - 1];
+}
+
+void UserStorage::fillFromFileSystem()
+{
+    for (size_t i = 0; i < numUsers_; ++i)
+        users_[i].freeResources();
+
+    numUsers_ = 1;
+
+    users_[0].load("_unassigned");
+    portablefs::Dir d(userDir);
+    while (d.next())
+    {
+        if (d.isFile() && d.fileName()[0] != '_')
+        {
+            users_[numUsers_].load(d.fileName());
+            ++numUsers_;
+        }
+    }
+}

lib/userdb/UserDB.h

@@ -0,0 +1,73 @@
+#pragma once
+
+#ifndef PLATFORM_NATIVE
+#include <Arduino.h>
+#endif
+
+
+using SessionIdType = uint32_t;
+constexpr size_t MAX_USERS = 64;
+constexpr size_t INITIAL_SESSIONS_PER_USER = 128;
+
+struct User
+{
+public:
+    User() : numSessions_(0), numSessionsAllocated_(0), sessionIds_(nullptr) {}
+
+    void init(const String &name, size_t sessionAllocateSize = INITIAL_SESSIONS_PER_USER);
+    void freeResources();
+
+    bool load(const String &name);
+    void save();
+    void remove();
+    bool valid() const { return sessionIds_ != nullptr; }
+
+    void insertSession(SessionIdType sessionId);
+    bool removeSession(SessionIdType sessionId);
+
+    bool hasSession(SessionIdType sessionId) const;
+
+    const String &name() const { return name_; }
+
+    // session access
+    SessionIdType *sessionBegin() { return sessionIds_; }
+    SessionIdType *sessionEnd() { return sessionIds_ + numSessions_; }
+
+    const SessionIdType *sessionBegin() const { return sessionIds_; }
+    const SessionIdType *sessionEnd() const { return sessionIds_ + numSessions_; }
+
+private:
+    void growSessionArrayIfNecessary();
+
+    String name_;
+    size_t numSessions_;
+    size_t numSessionsAllocated_;
+    SessionIdType *sessionIds_;
+};
+
+class UserStorage
+{
+public:
+    UserStorage()
+        : numUsers_(0)
+    {
+        fillFromFileSystem();
+    }
+    User *getUserInfo(const String &userName);
+    User *getUnassignedUser();
+
+    User *addNewUser(const String &userName);
+    bool deleteUser(const String &userName);
+
+    User *begin() { return &users_[0]; }
+    User *end() { return &users_[numUsers_]; }
+
+    const User *begin() const { return &users_[0]; }
+    const User *end() const { return &users_[numUsers_]; }
+
+private:
+    void fillFromFileSystem();
+
+    User users_[MAX_USERS];
+    size_t numUsers_;
+};

lib/webdav/AsyncWebDav.h

@@ -1,5 +1,6 @@
 #include <ESPAsyncWebServer.h>
-#include <FS.h>
+#include "FilesystemAbstraction.h"
+
 
 #define FLASH_TEXT(name) const char *name
 
@@ -35,7 +36,7 @@ public:
     WebdavFileListCallback(const String &path)
         : path_(path), headerWritten_(false), finished_(false)
     {
-        dir_ = SPIFFS.openDir(path);
+        dir_ = portablefs::openDir(path);
     }
 
     size_t operator()(uint8_t *buffer, size_t maxLen, size_t index)
@@ -104,11 +105,11 @@ public:
         }
 
         size_t bytesWritten = buffer - bufferStart;
-        assert(bytesWritten < maxLen, "Written too much!");
-        Serial.print("Bytes written ");
-        Serial.println(bytesWritten);
-        Serial.print("Max bytes ");
-        Serial.println(maxLen);
+        assert_msg(bytesWritten < maxLen, "Written too much!");
+        //Serial.print("Bytes written ");
+        //Serial.println(bytesWritten);
+        //Serial.print("Max bytes ");
+        //Serial.println(maxLen);
         return bytesWritten;
     }
 
@@ -122,7 +123,7 @@ private:
     {
         size_t size = 0;
         auto fileBase = fileZero.substring(0, fileZero.indexOf('_'));
-        auto newDirInstance = SPIFFS.openDir(path_);
+        auto newDirInstance = portablefs::openDir(path_);
         while (newDirInstance.next())
             if (newDirInstance.isFile() && newDirInstance.fileName().startsWith(fileBase))
                 size += newDirInstance.fileSize();
@@ -136,7 +137,7 @@ private:
         buffer += len;
     }
 
-    Dir dir_;
+    portablefs::Dir dir_;
     const String path_;
     bool headerWritten_;
     bool finished_;
@@ -147,7 +148,7 @@ bool deleteMeasurementFiles(const String &stName, const String &folder)
     String baseName = folder + "/" + stName.substring(0, stName.indexOf("."));
     int counter = 0;
     {
-        auto d = SPIFFS.openDir(folder);
+        auto d = portablefs::openDir(folder);
         while (d.next())
             if (d.isFile() && d.fileName().startsWith(baseName))
                 ++counter;

src/ConfigHardware.h

@@ -1,11 +1,29 @@
+#pragma once
+
 #include <cstdint>
 
+
+//#define _HW_V_20
+
 // HX711 load cell
+#ifdef USE_ESP32
+
+#ifdef  _HW_V_20
+const int CONFIG_SCALE_DOUT_PIN = 23;
+const int CONFIG_SCALE_SCK_PIN = 22;
+#else
+const int CONFIG_SCALE_DOUT_PIN = 22;
+const int CONFIG_SCALE_SCK_PIN = 23;
+#endif
+
+#else
 const int CONFIG_SCALE_DOUT_PIN = D2;
 const int CONFIG_SCALE_SCK_PIN = D3;
-const uint8_t CONFIG_TARE_AVG_COUNT = 50;       // number of measurements in tare-phase (to find 0 )
-const int CONFIG_VALUE_DIVIDER = 128;           // uint32 measurements are divided by this factor, before stored in uint16_t
+#endif
+const uint8_t CONFIG_MEASUREMENT_AVG_COUNT = 1; // number of measurements in normal phase
+const uint8_t CONFIG_TARE_AVG_COUNT = 6;        // number of measurements in tare-phase (to find 0 )
 const int CONFIG_MEASURE_DELAY = 100;           // interval in ms between measurements
-
+//const int CONFIG_VALUE_DIVIDER = 8;             // uint32 measurements are divided by this factor, before stored in uint16_t
+const int CONFIG_VALUE_DIVIDER = 256;             // uint32 measurements are divided by this factor, before stored in uint16_t
 
 const uint32_t CONFIG_SESSION_CHUNK_SIZE = 1024; //1024*8 - 16 * sizeof(uint32_t);

src/DeviceInfoLog.h

@@ -1,7 +1,12 @@
+#ifdef USE_ESP32
+#include "SPIFFS.h"
+#else
 #include <FS.h>
+#endif
 
 inline void printDeviceInfo()
 {
+    /*
     FSInfo fs_info;
     SPIFFS.info(fs_info);
 
@@ -66,4 +71,5 @@ inline void printDeviceInfo()
         str += "\r\n";
     }
     Serial.print(str);
+    */
 }

src/firmware_main.cpp

@@ -1,7 +1,13 @@
+#define USE_ESP32
+
 // Arduino & ESP headers
 #include <Arduino.h>
+#ifdef USE_ESP32
+#include <WiFi.h>
+#else
 #include <ESP8266WiFi.h>
 #include <ESPAsyncTCP.h>
+#endif
 #include <ESPAsyncWebServer.h>
 #include <WiFiUdp.h>   // for NTP
 #include <NTPClient.h> // for NTP
@@ -9,6 +15,7 @@
 // Own libs
 #include "Dtypes.h"
 #include "MockScale.h"
+#include "Scale.h"
 #include "MeasurementSession.h"
 #include "SpiffsStorage.h"
 #include "DeviceInfoLog.h"
@@ -46,6 +53,7 @@ public:
 
     void stopMeasurements() {
         measuring_ = false;
+        session.finalize();
     }
 
     bool isMeasuring() const {
@@ -54,12 +62,14 @@ public:
 
     void iteration() {
         if( ! measuring_ ) {
+            //Serial.println("Disabled");
             return;
         }
-        uint16_t measurement;
+        uint16_t measurement=-1;
         scale.measure(measurement);
         session.addPoint(measurement);
-
+        Serial.print("Measurement: ");
+        Serial.println(measurement);
         if( lastCallTime_ != 0) {
             const long cycleDuration = millis() - lastCallTime_;
             if( cycleDuration <= CONFIG_MEASURE_DELAY)
@@ -69,8 +79,7 @@ public:
             else
             {
                 const long skipped = (cycleDuration / CONFIG_MEASURE_DELAY);
-                Serial.print("Warning: measurements skipped: ");
-                Serial.println(skipped);
+                //Serial.printf("Warning: measurements skipped: %d, cycleDuration %d", skipped, cycleDuration);
 
                 for(int i=0; i < skipped; ++i)
                   session.addPoint(measurement);
@@ -84,7 +93,8 @@ public:
     Session_T & getSession() { return session; }
 
 private:
-    MockScale scale;
+    Scale<CONFIG_VALUE_DIVIDER> scale;
+    //MockScale scale;
     Session_T session;
     bool measuring_;
     long lastCallTime_;
@@ -100,12 +110,18 @@ template<typename Session_T>
 void httpSetup(SessionManager<Session_T> * sessionManager)
 {
     server.on("/api/session/start", HTTP_POST | HTTP_GET, [sessionManager](AsyncWebServerRequest * req) {
-        req->send(200, "text/plain", F("OK"));
+        AsyncWebServerResponse *response = req->beginResponse(200, "text/plain", F("OK"));
+        response->addHeader("Access-Control-Allow-Origin", "*");
+        req->send(response);
+        //req->send(200, "text/plain", F("OK"));
         sessionManager->startMeasurements();
         Serial.println("Started measurements");
     });
     server.on("/api/session/stop", HTTP_POST | HTTP_GET, [sessionManager](AsyncWebServerRequest * req) {
-        req->send(200, "text/plain", F("OK"));
+        AsyncWebServerResponse *response = req->beginResponse(200, "text/plain", F("OK"));
+        response->addHeader("Access-Control-Allow-Origin", "*");
+        req->send(response);
+        //req->send(200, "text/plain", F("OK"));
         sessionManager->stopMeasurements();
         Serial.println("Stopped measurements");
     });
@@ -114,6 +130,8 @@ void httpSetup(SessionManager<Session_T> * sessionManager)
         if( req->hasParam("startIdx") ) {
             startIdx = req->getParam("startIdx")->value().toInt();
         }
+        Serial.print("Data request, start index: ");
+        Serial.println(startIdx);
 
         StreamingMsgPackEncoder<DummyWriter> encoderToDetermineSize(nullptr);
         encoderToDetermineSize.setSizeCountMode(true);
@@ -122,18 +140,14 @@ void httpSetup(SessionManager<Session_T> * sessionManager)
         Serial.print("Sending started of total size ");
         Serial.println(totalSize);
         auto callback = [=](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
-            Serial.print("Partial send maxLen ");
-            Serial.print(maxLen);
-            Serial.print(" index ");
-            Serial.println(index);
             CopyWriter copyWriter(buffer);
             ChunkedStreamingMsgPackEncoder<CopyWriter> encoder(&copyWriter, index, index + maxLen);
             sessionManager->getSession().serialize(encoder, startIdx);
-            Serial.print("Bytes sent ");
-            Serial.println(encoder.sentBytes() - index);
             return encoder.sentBytes() - index;
         };
         AsyncWebServerResponse *response = req->beginResponse("application/x-msgpack", totalSize, callback);
+        response->addHeader("Access-Control-Allow-Origin", "*");
+
         auto sessionId = sessionManager->getSession().getStartTime();
         response->addHeader("content-disposition", "attachment; filename=\"" + String(sessionId) + ".st\"");
         req->send(response);
@@ -144,6 +158,38 @@ void httpSetup(SessionManager<Session_T> * sessionManager)
     server.begin();
 }
 
+void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
+    Serial.printf("Listing directory: %s\r\n", dirname);
+
+    File root = fs.open(dirname);
+    if(!root){
+        Serial.println("- failed to open directory");
+        return;
+    }
+    if(!root.isDirectory()){
+        Serial.println(" - not a directory");
+        return;
+    }
+
+    File file = root.openNextFile();
+    while(file){
+        if(file.isDirectory()){
+            Serial.print("  DIR : ");
+            Serial.println(file.name());
+            if(levels){
+                listDir(fs, file.name(), levels -1);
+            }
+        } else {
+            Serial.print("  FILE: ");
+            Serial.print(file.name());
+            Serial.print("\tSIZE: ");
+            Serial.println(file.size());
+        }
+        file = root.openNextFile();
+    }
+}
+
+
 void setup()
 {
     // Serial
@@ -153,14 +199,19 @@ void setup()
     Serial.println("----- New start -----");
 
     // File system
-    SPIFFS.begin();
+    bool spiffsResult = SPIFFS.begin(true);
+    Serial.printf("Spiffs begin %d\n", spiffsResult);
 
     printDeviceInfo();
 
     // WiFi
     WiFi.mode(WIFI_STA);
     WiFi.begin(CONFIG_WIFI_SSID, CONFIG_WIFI_PASSWORD);
-    WiFi.hostname(CONFIG_HOSTNAME);
+    #ifdef USE_ESP32
+    WiFi.setHostname(CONFIG_HOSTNAME);
+    #else
+    WIFI.hostname(CONFIG_HOSTNAME);
+    #endif
     Serial.print(F("\n\n"));
     Serial.println(F("Waiting for WIFI connection..."));
     while (WiFi.status() != WL_CONNECTED) {
@@ -178,6 +229,9 @@ void setup()
 
     // HTTP & Websocket server
     httpSetup(&sessionManager);
+
+    Serial.println("Spiffs listing:");
+    listDir(SPIFFS, "/", 3);
 }
 
 void loop() {