initial commit

2021-02-14 13:07:08 +01:00
commit 10894d2a6e
25 changed files with 1370 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+HCPBridge/.vscode
--- a/HCPBridge/.gitignore
+++ b/HCPBridge/.gitignore
@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
--- a/HCPBridge/include/README
+++ b/HCPBridge/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
--- a/HCPBridge/lib/README
+++ b/HCPBridge/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
--- a/HCPBridge/platformio.ini
+++ b/HCPBridge/platformio.ini
@@ -0,0 +1,17 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp12e]
+platform = espressif8266
+board = esp12e
+framework = arduino
+lib_deps = 
+	ottowinter/ESPAsyncWebServer-esphome@^1.2.7
+	bblanchon/ArduinoJson@^6.17.2
--- a/HCPBridge/src/hciemulator.cpp
+++ b/HCPBridge/src/hciemulator.cpp
@@ -0,0 +1,425 @@
+#include "hciemulator.h"
+#define CHECKCHANGEDSET(Target,Value,Flag) if((Target)!=(Value)){Target=Value;Flag=true;}
+int hciloglevel = DEFAULTLOGLEVEL;
+
+#ifdef SOFTSERIAL
+#define Log(Level,Message) LogCore(Level,Message)
+#define Log3(Level,Message,Buffer, Len) LogCore(Level,Message,Buffer,Len)
+//LOGLEVEL
+void LogCore(int Level, const char* msg, const unsigned char * data=NULL, size_t datalen=0){
+    if(Level>hciloglevel){
+        return;
+    }
+    if(data!=NULL && datalen>0){ 
+        String newmsg(msg);
+        char str[4];
+        for (size_t i = 0; i < datalen; i++){
+            snprintf(str,sizeof(str),"%02x ", data[i]);
+            newmsg+=str;
+        }
+        Serial.println(newmsg);        
+    }else{
+        Serial.println(msg);
+    }
+}
+#else 
+    #define Log(Level,Message) 
+    #define Log3(Level,Message,Buffer, Len) 
+#endif
+
+
+int HCIEmulator::getLogLevel(){
+    return hciloglevel;
+    
+}
+void HCIEmulator::setLogLevel(int level){
+    hciloglevel=level;
+}
+
+//modbus crc calculation borrowed from:
+//https://github.com/yaacov/ArduinoModbusSlave
+#define MODBUS_CRC_LENGTH 2
+#define readCRC(arr, length) word(arr[(length - MODBUS_CRC_LENGTH) + 1], arr[length - MODBUS_CRC_LENGTH])
+#define readUInt16(arr, index) word(arr[index], arr[index + 1])
+/**
+ * Calculate the CRC of the passed byte array from zero up to the passed length.
+ *
+ * @param buffer The byte array containing the data.
+ * @param length The length of the byte array.
+ *
+ * @return The calculated CRC as an unsigned 16 bit integer.
+ * 
+ * Calculate and add the CRC.
+ *       uint16_t crc = Modbus::calculateCRC(_responseBuffer, _responseBufferLength - MODBUS_CRC_LENGTH);
+ *       _responseBuffer[_responseBufferLength - MODBUS_CRC_LENGTH] = crc & 0xFF;
+ *       _responseBuffer[(_responseBufferLength - MODBUS_CRC_LENGTH) + 1] = crc >> 8;
+ * 
+ * 
+ * #define MODBUS_FRAME_SIZE 4
+ * #define MODBUS_CRC_LENGTH 2
+ * uint16_t crc = readCRC(_requestBuffer, _requestBufferLength);
+ * #define readUInt16(arr, index) word(arr[index], arr[index + 1])
+ * #define readCRC(arr, length) word(arr[(length - MODBUS_CRC_LENGTH) + 1], arr[length - MODBUS_CRC_LENGTH])
+ */
+uint16_t calculateCRC(uint8_t *buffer, int length)
+{
+    int i, j;
+    uint16_t crc = 0xFFFF;
+    uint16_t tmp;
+
+    // Calculate the CRC.
+    for (i = 0; i < length; i++)
+    {
+        crc = crc ^ buffer[i];
+        for (j = 0; j < 8; j++)
+        {
+            tmp = crc & 0x0001;
+            crc = crc >> 1;
+            if (tmp)
+            {
+                crc = crc ^ 0xA001;
+            }
+        }
+    }
+    return crc;
+}
+
+HCIEmulator::HCIEmulator(Stream * port) { 
+    m_state.valid = false; 
+    m_statemachine=WAITING;
+    m_rxlen = m_txlen = 0;
+    m_recvTime=m_lastStateTime=0;
+    m_skipFrame=false;
+    m_port = port;
+    m_statusCallback = NULL;
+    setLogLevel(DEFAULTLOGLEVEL);
+};
+
+void HCIEmulator::poll(){
+    
+    if(m_port==NULL) return;
+
+    // receive Data
+    if(m_port->available() >0)
+    {
+        m_rxlen+= m_port->readBytes((char*)(m_rxbuffer+m_rxlen), _min((int)(255-m_rxlen),m_port->available()));
+        if(m_rxlen > 254)
+        {
+            Log(LL_ERROR,"RX Bufferoverflow, skip next Frame");   
+            Log3(LL_DEBUG,"Buffer Data: ", m_rxbuffer, m_rxlen);
+            m_rxlen=0;               
+            m_skipFrame = true;
+        }
+        m_recvTime = micros();             
+    }        
+    
+
+    // check frame, process frame
+    if(m_rxlen>0 && (micros()-m_recvTime > T3_5)) 
+    {
+        // check last action timeout -> reset > then 2sec
+        if(m_statemachine!= WAITING && m_lastStateTime+2000<millis()){
+            m_statemachine = WAITING;
+        }
+
+        if(!m_skipFrame){
+
+            processFrame();
+
+            // send response
+            if(m_txlen > 0){
+                
+                // fix crc
+                uint16_t crc = calculateCRC(m_txbuffer, m_txlen - MODBUS_CRC_LENGTH);
+                m_txbuffer[m_txlen - MODBUS_CRC_LENGTH] = crc & 0xFF;
+                m_txbuffer[(m_txlen - MODBUS_CRC_LENGTH) + 1] = crc >> 8;                
+
+                // send data
+                m_lastSendTime = micros()-m_recvTime;
+
+                //Log(LL_DEBUG, ("ST:"+String(m_lastSendTime)).c_str());
+                
+                m_port->write(m_txbuffer, m_txlen);
+                Log3(LL_DEBUG,"Response: ", m_txbuffer, m_txlen);
+                m_txlen = 0;
+            }                
+        }
+
+        m_skipFrame = false;
+        m_rxlen=0;            
+    }    
+}
+
+void HCIEmulator::processFrame(){
+    m_txlen = 0;    // clear send buffer
+
+    if(m_rxlen<5) {
+        Log(LL_ERROR,"Frame skipped, invalid frame len");      
+        Log3(LL_ERROR,"Data:", m_rxbuffer,m_rxlen);
+        return;
+    }
+
+    // check device id, pass only device id 2 and 0 (broadcast)
+    if(m_rxbuffer[0] != BROADCASTID && m_rxbuffer[0] != DEVICEID){      
+        Log(LL_DEBUG,"Frame skipped, unsupported device id");      
+        Log3(LL_DEBUG,"Data:", m_rxbuffer,m_rxlen);
+        return;
+    }
+
+    // check crc
+    uint16_t crc = readCRC(m_rxbuffer, m_rxlen);        
+    if(crc != calculateCRC(m_rxbuffer,m_rxlen-MODBUS_CRC_LENGTH)){
+        Log3(LL_ERROR,"Frame skipped, wrong crc", m_rxbuffer,m_rxlen);
+        return;
+    }
+
+    Log3(LL_DEBUG,"Incomming Data: ", m_rxbuffer, m_rxlen);
+
+    // dispatch modbus function
+    switch(m_rxbuffer[1]){ 
+        case 0x10:{  //  Write Multiple registers                            
+            if(m_rxlen == 0x1b && m_rxbuffer[0] == BROADCASTID)
+            {
+                processBroadcastStatusFrame();
+                return;
+            }  
+            break;
+        }
+        
+        case 0x17:{ // Read/Write Multiple registers
+            if(m_rxbuffer[0] == DEVICEID){
+                switch(m_rxlen){
+                    case 0x11:{
+                        processDeviceStatusFrame();
+                        return;
+                    }
+
+                    case 0x13:
+                        processDeviceBusScanFrame();
+                        return;;
+                }
+            }
+            break;                               
+        }
+    }
+    Log3(LL_ERROR,"Frame skipped, unexpected data: ", m_rxbuffer, m_rxlen);
+}
+
+const unsigned char ResponseTemplate_Fcn17_Cmd03_L08 []= {0x02,0x17,0x10,0x3E,0x00,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x74,0x1B};
+const unsigned char ResponseTemplate_Fcn17_Cmd04_L02 []= {0x02,0x17,0x04,0x0F,0x00,0x04,0xFD,0x0A,0x72};
+void HCIEmulator::processDeviceStatusFrame(){
+    if(m_rxlen==0x11){  
+        unsigned char counter = m_rxbuffer[11];
+        unsigned char cmd = m_rxbuffer[12];
+        if(m_rxbuffer[5] == 0x08){
+                // expose internal state
+            //      00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
+            //0011: 02 17 9C B9 00 08 9C 41 00 02 04 3E 03 00 00 EB CC
+            //res=> 02 17 10 3E 00 03 01 00 00 00 00 00 00 00 00 00 00 00 00 74 1B                 
+            memcpy_P(m_txbuffer, ResponseTemplate_Fcn17_Cmd03_L08, sizeof(ResponseTemplate_Fcn17_Cmd03_L08));  
+            m_txbuffer[0] = m_rxbuffer[0];
+            m_txbuffer[3] = counter;
+            m_txbuffer[5] = cmd;
+            m_txlen = sizeof(ResponseTemplate_Fcn17_Cmd03_L08);   
+
+            
+            switch(m_statemachine)
+            {
+                // open Door
+                case STARTOPENDOOR:
+                    m_txbuffer[7]= 0x02;
+                    m_txbuffer[8]= 0x10;
+                    m_statemachine = STARTOPENDOOR_RELEASE;
+                    m_lastStateTime = millis();
+                    break;
+                case STARTOPENDOOR_RELEASE:
+                    if(m_lastStateTime+SIMULATEKEYPRESSDELAYMS<millis()){
+                        m_txbuffer[7]= 0x01;
+                        m_txbuffer[8]= 0x10;
+                        m_statemachine = WAITING; 
+                    }
+                    break;
+
+                // close Door
+                case STARTCLOSEDOOR:
+                    m_txbuffer[7]= 0x02;
+                    m_txbuffer[8]= 0x20;
+                    m_statemachine = STARTCLOSEDOOR_RELEASE;
+                    m_lastStateTime = millis();
+                    break;
+                case STARTCLOSEDOOR_RELEASE:
+                    if(m_lastStateTime+SIMULATEKEYPRESSDELAYMS<millis()){
+                        m_txbuffer[7]= 0x01;
+                        m_txbuffer[8]= 0x20;
+                        m_statemachine = WAITING; 
+                    }
+                    break;   
+
+                // stop Door
+                case STARTSTOPDOOR:
+                    m_txbuffer[7]= 0x02;
+                    m_txbuffer[8]= 0x40;
+                    m_statemachine = STARTSTOPDOOR_RELEASE;
+                    m_lastStateTime = millis();
+                    break;
+                case STARTSTOPDOOR_RELEASE:
+                    if(m_lastStateTime+SIMULATEKEYPRESSDELAYMS<millis()){
+                        m_txbuffer[7]= 0x01;
+                        m_txbuffer[8]= 0x40;
+                        m_statemachine = WAITING; 
+                    }
+                    break;
+
+                // Ventilation
+                case STARTVENTPOSITION:
+                    m_txbuffer[7]= 0x02;
+                    m_txbuffer[9]= 0x40;
+                    m_statemachine = STARTVENTPOSITION_RELEASE;
+                    m_lastStateTime = millis();
+                    break;
+                case STARTVENTPOSITION_RELEASE:
+                    if(m_lastStateTime+SIMULATEKEYPRESSDELAYMS<millis()){
+                        m_txbuffer[7]= 0x01;
+                        m_txbuffer[9]= 0x40;
+                        m_statemachine = WAITING; 
+                    }
+                    break;        
+
+
+                // Half Position
+                case STARTOPENDOORHALF:
+                    m_txbuffer[7]= 0x02;
+                    m_txbuffer[9]= 0x04;
+                    m_statemachine = STARTOPENDOORHALF_RELEASE;
+                    m_lastStateTime = millis();
+                    break;
+
+                case STARTOPENDOORHALF_RELEASE:
+                    if(m_lastStateTime+SIMULATEKEYPRESSDELAYMS<millis()){
+                        m_txbuffer[7]= 0x01;
+                        m_txbuffer[9]= 0x04;
+                        m_statemachine = WAITING; 
+                    }
+                    break;                                          
+
+                // Toggle Lamp
+                case STARTTOGGLELAMP:
+                    m_txbuffer[7]= 0x10;
+                    m_txbuffer[9]= 0x02;
+                    m_statemachine = STARTTOGGLELAMP_RELEASE;
+                    m_lastStateTime = millis();
+                    break;
+                case STARTTOGGLELAMP_RELEASE:
+                    if(m_lastStateTime+SIMULATEKEYPRESSDELAYMS<millis()){
+                        m_txbuffer[7]= 0x08;
+                        m_txbuffer[9]= 0x02;
+                        m_statemachine = WAITING; 
+                    }
+                    break;  
+                    
+                case WAITING:
+                    break;            
+            }                                 
+            return;             
+        }
+        else if(m_rxbuffer[5] == 0x02){
+            //      00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
+            //0011: 02 17 9C B9 00 02 9C 41 00 02 04 0F 04 17 00 7B 21
+            //res=> 02 17 04 0F 00 04 FD 0A 72     
+            memcpy_P(m_txbuffer, ResponseTemplate_Fcn17_Cmd04_L02, sizeof(ResponseTemplate_Fcn17_Cmd04_L02));  
+            m_txbuffer[0] = m_rxbuffer[0];
+            m_txbuffer[3] = counter;
+            m_txbuffer[5] = cmd;
+            m_txlen = sizeof(ResponseTemplate_Fcn17_Cmd04_L02);   
+            return;
+        }
+    }
+
+    Log3(LL_ERROR,"Frame skipped, unexpected data: ", m_rxbuffer, m_rxlen); 
+}
+
+const unsigned char ResponseTemplate_Fcn17_Cmd02_L05 []= {0x02,0x17,0x0a,0x00,0x00,0x02,0x05,0x04,0x30,0x10,0xff,0xa8,0x45,0x0e,0xdf};
+void HCIEmulator::processDeviceBusScanFrame(){
+    //      00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
+    //0013: 02 17 9C B9 00 05 9C 41 00 03 06 00 02 00 00 01 02 f8 35
+    //res=> 02 17 0a 00 00 02 05 04 30 10 ff a8 45 0e df
+    unsigned char counter = m_rxbuffer[11];
+    unsigned char cmd = m_rxbuffer[12];
+    memcpy_P(m_txbuffer, ResponseTemplate_Fcn17_Cmd02_L05, sizeof(ResponseTemplate_Fcn17_Cmd02_L05));  
+    m_txbuffer[0] = m_rxbuffer[0];
+    m_txbuffer[3] = counter;
+    m_txbuffer[5] = cmd;
+    m_txlen = sizeof(ResponseTemplate_Fcn17_Cmd02_L05); 
+
+    Log(LL_INFO,"Busscan received");  
+}
+
+void HCIEmulator::processBroadcastStatusFrame(){
+    //001B: 00 10 9D 31 00 09 12 64 00 00 00 40 60 00 00 00 00 00 00 00 00 00 01 00 00 CA 22
+    bool hasChanged = false;
+    CHECKCHANGEDSET(m_state.lampOn,m_rxbuffer[20] == 0x14,hasChanged);      
+    CHECKCHANGEDSET(m_state.doorCurrentPosition,m_rxbuffer[10],hasChanged);
+    CHECKCHANGEDSET(m_state.doorTargetPosition, m_rxbuffer[9],hasChanged);
+    CHECKCHANGEDSET(m_state.doorState, m_rxbuffer[11],hasChanged);
+    CHECKCHANGEDSET(m_state.reserved, m_rxbuffer[17],hasChanged);
+    CHECKCHANGEDSET(m_state.valid, true,hasChanged);   
+    
+    if(hasChanged){
+        Log3(LL_INFO,"New State: ",m_rxbuffer,m_rxlen);
+        if(m_statusCallback != NULL){
+            m_statusCallback(m_state);
+        }  
+    }             
+}    
+
+void HCIEmulator::openDoor(){
+    if(m_statemachine != WAITING){
+        return;
+    }
+    m_lastStateTime = millis();
+    m_statemachine = STARTOPENDOOR;
+}
+
+void HCIEmulator::openDoorHalf(){
+    if(m_statemachine != WAITING){
+        return;
+    }
+    m_lastStateTime = millis();
+    m_statemachine = STARTOPENDOORHALF;
+}
+
+void HCIEmulator::closeDoor(){
+    if(m_statemachine != WAITING){
+        return;
+    }
+    m_lastStateTime = millis();    
+    m_statemachine = STARTCLOSEDOOR;
+}
+
+void HCIEmulator::stopDoor(){
+    if(m_statemachine != WAITING){
+        return;
+    }
+    m_lastStateTime = millis();    
+    m_statemachine = STARTSTOPDOOR;
+}
+
+void HCIEmulator::toggleLamp(){
+    if(m_statemachine != WAITING){
+        return;
+    }
+    m_lastStateTime = millis();
+    m_statemachine = STARTTOGGLELAMP;
+}
+
+void HCIEmulator::ventilationPosition(){
+    if(m_statemachine != WAITING){
+        return;
+    }
+    m_lastStateTime = millis();
+    m_statemachine = STARTVENTPOSITION;
+}
+
+void HCIEmulator::onStatusChanged(callback_function_t handler) {
+    m_statusCallback = handler;
+}
--- a/HCPBridge/src/hciemulator.h
+++ b/HCPBridge/src/hciemulator.h
@@ -0,0 +1,130 @@
+#ifndef __hciemulator_h
+#define __hciemulator_h
+
+#include <Stream.h>
+#include "SoftwareSerial.h"
+
+#define LL_OFF 0
+#define LL_ERROR 1
+#define LL_WARN 2
+#define LL_INFO 3
+#define LL_DEBUG 4
+
+#define DEFAULTLOGLEVEL LL_WARN
+
+#define DEVICEID 0x02
+#define BROADCASTID 0x00
+#define SIMULATEKEYPRESSDELAYMS 100 
+
+
+// Modbus states that a baud rate higher than 19200 must use a fixed 750 us 
+// for inter character time out and 1.75 ms for a frame delay.
+// For baud rates below 19200 the timeing is more critical and has to be calculated.
+// E.g. 9600 baud in a 10 bit packet is 960 characters per second
+// In milliseconds this will be 960characters per 1000ms. So for 1 character
+// 1000ms/960characters is 1.04167ms per character and finaly modbus states an
+// intercharacter must be 1.5T or 1.5 times longer than a normal character and thus
+// 1.5T = 1.04167ms * 1.5 = 1.5625ms. A frame delay is 3.5T.  
+#define T1_5 750
+#define T3_5  4800 //1750  
+
+
+enum DoorState : uint8_t {    
+    DOOR_OPEN_POSITION =  0x20,    
+    DOOR_CLOSE_POSITION = 0x40,
+    DOOR_HALF_POSITION =  0x80,
+    DOOR_MOVE_CLOSEPOSITION = 0x02,
+    DOOR_MOVE_OPENPOSITION = 0x01,
+    
+};
+
+struct SHCIState{
+    bool valid;
+    bool lampOn;
+    uint8_t doorState; // see DoorState
+    uint8_t doorCurrentPosition;
+    uint8_t doorTargetPosition;
+    uint8_t reserved;
+};
+
+enum StateMachine: uint8_t{
+    WAITING,
+
+    STARTOPENDOOR,
+    STARTOPENDOOR_RELEASE,
+
+    STARTOPENDOORHALF,
+    STARTOPENDOORHALF_RELEASE,
+
+    STARTCLOSEDOOR,
+    STARTCLOSEDOOR_RELEASE,
+
+    STARTSTOPDOOR,
+    STARTSTOPDOOR_RELEASE,
+
+    STARTTOGGLELAMP,
+    STARTTOGGLELAMP_RELEASE,
+
+    STARTVENTPOSITION,
+    STARTVENTPOSITION_RELEASE
+};
+
+class HCIEmulator {
+public:
+    typedef std::function<void(const SHCIState&)> callback_function_t;
+
+    HCIEmulator(Stream * port);
+
+    void poll();
+
+    void openDoor();
+    void openDoorHalf();
+    void closeDoor();
+    void stopDoor();
+    void toggleLamp();
+    void ventilationPosition();
+
+    const SHCIState& getState() {   
+        if(micros()-m_recvTime > 2000000){
+            // 2 sec without statusmessage 
+            m_state.valid = false;
+        }
+        return m_state;
+    };
+    
+    unsigned long getMessageAge(){
+        return micros()-m_recvTime;
+    }
+
+    int getLogLevel();
+    void setLogLevel(int level);
+
+    void onStatusChanged(callback_function_t handler);
+
+protected:
+    void processFrame();
+    void processDeviceStatusFrame();
+    void processDeviceBusScanFrame();
+    void processBroadcastStatusFrame();
+
+private:
+    callback_function_t m_statusCallback;    
+    Stream *m_port;
+    SHCIState m_state;
+    StateMachine m_statemachine;
+
+    unsigned long m_recvTime;
+    unsigned long m_lastStateTime;
+    unsigned long m_lastSendTime;
+
+    size_t m_rxlen;
+    size_t m_txlen;
+
+    unsigned char m_rxbuffer[255];
+    unsigned char m_txbuffer[255];
+
+    bool m_skipFrame;
+};
+
+
+#endif
--- a/HCPBridge/src/index_html.h
+++ b/HCPBridge/src/index_html.h
--- a/HCPBridge/src/main.cpp
+++ b/HCPBridge/src/main.cpp
@@ -0,0 +1,163 @@
+#include <Arduino.h>
+#include <ESPAsyncWebServer.h>
+#include "AsyncJson.h"
+#include "ArduinoJson.h"
+#include "hciemulator.h"
+#include "index_html.h"
+
+/* create this file and add your wlan credentials
+  const char* ssid = "MyWLANSID";
+  const char* password = "MYPASSWORD";
+*/
+#include "../../../private/credentials.h"
+
+
+// switch relay sync to the lamp
+// e.g. the Wifi Relay Board U4648
+#define USERELAY
+
+// use alternative uart pins 
+//#define SWAPUART
+
+#define RS485 Serial
+
+// Relay Board parameters
+#define ESP8266_GPIO2    2 // Blue LED.
+#define ESP8266_GPIO4    4 // Relay control.
+#define ESP8266_GPIO5    5 // Optocoupler input.
+#define LED_PIN          ESP8266_GPIO2
+
+
+// Hörmann HCP2 based on modbus rtu @57.6kB 8E1
+HCIEmulator emulator(&RS485);
+
+// webserver on port 80
+AsyncWebServer server(80);
+
+
+// switch GPIO4 und GPIO2 sync to the lamp
+void onStatusChanged(const SHCIState& state){
+  //see https://ucexperiment.wordpress.com/2016/12/18/yunshan-esp8266-250v-15a-acdc-network-wifi-relay-module/
+  //Setting GPIO4 high, causes the relay to close the NO contact with
+  if(state.valid){    
+      digitalWrite( ESP8266_GPIO4, state.lampOn ); 
+      digitalWrite(LED_PIN, state.lampOn);
+  }else
+  {
+      digitalWrite( ESP8266_GPIO4, false ); 
+      digitalWrite(LED_PIN, false);
+  }
+}
+
+// toggle lamp to expected state
+void switchLamp(bool on){
+  bool toggle = (on && !emulator.getState().lampOn) || (!on && emulator.getState().lampOn);
+  if(toggle){
+    emulator.toggleLamp();
+  }    
+}
+
+// setup mcu
+void setup(){
+  
+  //setup modbus
+  RS485.begin(57600,SERIAL_8E1);
+  #ifdef SWAPUART
+  RS485.swap();  
+  #endif  
+  
+  //setup wifi
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  WiFi.setAutoReconnect(true);
+  while (WiFi.status() != WL_CONNECTED) {
+    emulator.poll();     
+  }
+
+  // setup http server
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
+    AsyncWebServerResponse *response = request->beginResponse_P( 200, "text/html", index_html,sizeof(index_html));
+    response->addHeader("Content-Encoding","deflate");    
+    request->send(response);
+  }); 
+
+  server.on("/status", HTTP_GET, [](AsyncWebServerRequest *request){
+    const SHCIState& doorstate = emulator.getState();
+    AsyncResponseStream *response = request->beginResponseStream("application/json");
+    DynamicJsonDocument root(1024);
+    root["valid"] = doorstate.valid;
+    root["doorstate"] = doorstate.doorState;
+    root["doorposition"] = doorstate.doorCurrentPosition;
+    root["doortarget"] = doorstate.doorTargetPosition;
+    root["lamp"] = doorstate.lampOn;
+    root["debug"] = doorstate.reserved;
+    root["lastresponse"] = emulator.getMessageAge()/1000;
+    serializeJson(root,*response);
+    request->send(response);
+  }); 
+
+  server.on("/command", HTTP_GET, [] (AsyncWebServerRequest *request) {    
+    if (request->hasParam("action")) {
+      int actionid = request->getParam("action")->value().toInt();
+      switch (actionid){
+      case 0:
+          emulator.closeDoor();
+        break;
+      case 1:
+          emulator.openDoor();
+          break;
+      case 2:
+          emulator.stopDoor();
+          break;
+      case 3:
+          emulator.ventilationPosition();
+          break;
+      case 4:
+          emulator.openDoorHalf();
+          break;
+      case 5:
+          emulator.toggleLamp();
+          break;      
+      default:
+        break;
+      }
+    }
+    request->send(200, "text/plain", "OK");
+  });
+
+  server.on("/update", HTTP_GET, [] (AsyncWebServerRequest *request) {    
+    if (request->hasParam("channel") && request->hasParam("state")) {
+      String channel = request->getParam("channel")->value();
+      String state = request->getParam("state")->value();
+      if(channel.equals("door")){
+        if(state=="1"){
+          emulator.openDoor();
+        }else{
+          emulator.closeDoor();
+        }          
+      }
+      if(channel.equals("light")){
+        switchLamp(state=="1");
+      }      
+    }
+    request->send(200, "text/plain", "OK");
+  });
+
+  server.begin();
+
+  //setup relay board
+#ifdef USERELAY
+  pinMode( ESP8266_GPIO4, OUTPUT );       // Relay control pin.
+  pinMode( ESP8266_GPIO5, INPUT_PULLUP ); // Input pin.
+  pinMode( LED_PIN, OUTPUT );             // ESP8266 module blue L
+  digitalWrite( ESP8266_GPIO4, 0 );
+  digitalWrite(LED_PIN,0);
+  emulator.onStatusChanged(onStatusChanged);
+#endif
+  
+}
+
+// mainloop
+void loop(){  
+    emulator.poll();    
+}
--- a/HCPBridge/src/webpage/buildindex.cmd
+++ b/HCPBridge/src/webpage/buildindex.cmd
@@ -0,0 +1 @@
+python compress.py
--- a/HCPBridge/src/webpage/command
+++ b/HCPBridge/src/webpage/command
--- a/HCPBridge/src/webpage/compress.py
+++ b/HCPBridge/src/webpage/compress.py
@@ -0,0 +1,42 @@
+#pip install htmlmin
+#or python -m pip install htmlmin
+#pip install jsmin
+#or python -m pip install jsmin
+
+import gzip
+import zlib
+import htmlmin
+from jsmin import jsmin
+
+
+
+content = ""
+with open('index.html','rt') as f:
+    content=f.read()
+
+
+content = htmlmin.minify(content, remove_comments=True, remove_empty_space=True, remove_all_empty_space=True, reduce_empty_attributes=True, reduce_boolean_attributes=False, remove_optional_attribute_quotes=True, convert_charrefs=True, keep_pre=False)
+
+
+import re
+regex = r"<script>(.+?)<\/script>"
+content = re.sub(regex, lambda x: "<script>"+jsmin(x.group(1))+"</script>" ,content, 0, re.DOTALL)
+
+
+#with gzip.open('htmltest.html.gz', 'wb') as f:
+#    f.write(content.encode("UTF-8"))
+
+#with open('htmltest.html.z','wb') as f:
+#    f.write(zlib.compress(content.encode("UTF-8"),9))
+
+result =""
+for c in zlib.compress(content.encode("UTF-8"),9):
+     result= result + ("0x%02X" %c)
+     if len(result)> 0:
+          result=result + ","
+
+
+with open('../index_html.h',"wt") as f:
+	f.write("const uint8_t index_html[] PROGMEM = {");
+	f.write(result.strip(","))
+	f.write("};");
--- a/HCPBridge/src/webpage/index.html
+++ b/HCPBridge/src/webpage/index.html
@@ -0,0 +1,159 @@
+<!DOCTYPE HTML><html>
+<head>
+  <title>Garagentor Steuerung</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta charset="UTF-8">
+  <link rel="icon" href="data:,">
+  <style>
+    html {font-family: Arial; display: inline-block; text-align: center;}
+    h2 {font-size: 3.0rem;}
+    p {font-size: 3.0rem;}
+    body {max-width: 600px; margin:0px auto; padding-bottom: 25px;}
+    .switch {position: relative; display: inline-block; width: 80px; height: 48px} 
+    .switch input {display: none}
+    .slider {position: absolute; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; border-radius: 6px}
+    .slider:before {position: absolute; content: ""; height: 32px; width: 32px; left: 8px; bottom: 8px; background-color: #fff; -webkit-transition: .4s; transition: .4s; border-radius: 3px}
+    input:checked+.slider {background-color: #b30000}
+    input:checked+.slider:before {-webkit-transform: translateX(32px); -ms-transform: translateX(32px); transform: translateX(32px)}
+	
+	.button {
+		border: 4px;
+		border-style: solid;
+		color: black;
+		width: 100px;
+		height: 100px;
+		text-align: center;
+		display: inline;
+		text-decoration: none;
+		display: inline-block;
+		font-weight: bold;
+		font-size: 20px;
+		margin: 4px 2px;
+		cursor: pointer;
+		border-radius: 50px;
+	}
+	.buttonred {border-color: #ED5961;}
+	.buttonyellow {border-color: #fcca00;}
+	.buttongreen {border-color: #48bd81;}  
+  </style>
+</head>
+<body>
+  <h2>Garagentor</h2>  
+	<canvas width="250px" height="250px" id="dc"></canvas>
+	<h3 id="status">warte auf Verbindung.</h3>	
+	
+	<hr/>
+	<button class="button buttonred" onclick="doCommand(1)">Auf</button> <button class="button buttonyellow" onclick="doCommand(2)">Stop</button> <button class="button buttongreen" onclick="doCommand(0)">Zu</button>
+	<hr/>
+	<h4>Licht</h4><label class="switch"><input type="checkbox" onchange="doCommand(5)" id="light"><span class="slider"></span></label>
+	<hr/>
+					
+	<script>
+	
+	
+	doorpos = 10;
+	dir = -1;
+	isconnected = false;
+	var animation;
+	function startDoorAnimation() {
+		if(!animation){
+			animation = setInterval(Draw, 200);
+		}
+		
+	}
+	function stopDoorAnimation() {
+		if(animation){
+			clearInterval(animation);
+		}
+		animation = null;
+	}
+	
+	function Draw(){		
+		var svg =document.getElementById("svg");
+		var dc = document.getElementById("dc");		
+		var ctx = dc.getContext("2d");
+		width = dc.width;
+		height = dc.height;
+		ctx.clearRect(0, 0, width, height);		
+		xa= [18,18,10,3,174,347,340,332,332,297,297,52,52,18];
+		ya= [327,114,117,100,22,100,117,114,327,327,112,112,327,327];
+		
+		ctx.fillStyle = "black";
+		ctx.beginPath();
+		for (i =0;i<xa.length;i++){			
+			if(i==0){
+				ctx.moveTo((xa[i]/350) * width , (ya[i]/350)*width);
+			}else{
+				ctx.lineTo((xa[i]/350) * width, (ya[i]/350)*width);
+			}
+		}
+		ctx.fill();
+		
+		for(i=0;i<doorpos;i++){			
+			ctx.fillRect((62/350) * width, ((120+21*i)/350) * width, (225/350) * width, (18/350) * width);
+		}
+		doorpos+=dir;	
+		
+		if(dir<0 && doorpos<=0){
+			dir=dir*-1;			
+		}
+		if(dir>0 &&doorpos>=10){
+			dir=dir*-1;			
+		}
+	}
+	
+	function doCommand(action) {
+      if(!isconnected){return;}
+	  var xhr = new XMLHttpRequest();
+	  xhr.open("GET", "/command?action="+action, true); 	  
+	  xhr.send();
+	}  
+	
+	function setDoorState(state){
+		stopDoorAnimation();		
+		if(state == 0) {doorpos = 10;dir = -1};
+		if(state == 1) {doorpos = 0; dir = 1};		
+		if(state == 2) {doorpos = 5; dir = 1};		
+		Draw();		
+		if(state == 3) startDoorAnimation();
+	}
+	
+	function getStatusText(id){
+		result = "Das Tor "
+		switch(id)
+		{
+			case 0x20: setDoorState(1); return result+"ist geöffnet.";
+			case 0x40: setDoorState(0); return result+"ist geschlossen.";
+			case 0x80: setDoorState(2); return result+"ist teilgeöffnet.";
+			case 0x00: setDoorState(2); return result+"ist teilgeöffnet.";
+			case 0x02: setDoorState(3); return result+"schließt.";
+			case 0x01: setDoorState(3); return result+"öffnet.";
+			case -1: setDoorState(0); return "keine Verbindung zum Tor.";
+			default: return "unbekanter Status: " + id;
+		}    
+	}
+	
+	function updateData(){
+			var xmlhttp = new XMLHttpRequest();
+			xmlhttp.onreadystatechange = function() {
+			  if (this.readyState == 4 && this.status == 200) {
+				var status = JSON.parse(this.responseText);	
+                isconnected = status.valid;
+				document.getElementById("status").innerHTML = getStatusText(status.valid?status.doorstate:-1);
+				document.getElementById("light").checked = status.lamp & status.valid;
+				return;
+			  }
+			  isconnected= false;
+			};			
+			xmlhttp.open("GET", "/status", true);
+			xmlhttp.send();
+	}
+		
+	Draw();
+	updateData();	
+	setInterval(updateData, 3000);
+	
+	
+</script>
+</body>
+</html>
--- a/HCPBridge/src/webpage/runtestserver.cmd
+++ b/HCPBridge/src/webpage/runtestserver.cmd
@@ -0,0 +1 @@
+python -m http.server 
--- a/HCPBridge/src/webpage/status
+++ b/HCPBridge/src/webpage/status
@@ -0,0 +1,9 @@
+{
+  "valid" : true,
+  "doorstate" : 1,
+  "doorposition" : 0,
+  "doortarget" : 0,
+  "lamp" : true,
+  "debug" : 0,
+  "lastresponse" : 0
+}
--- a/HCPBridge/test/README
+++ b/HCPBridge/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html
--- a/Investigation/ProtocolAnalyse.txt
+++ b/Investigation/ProtocolAnalyse.txt
@@ -0,0 +1,71 @@
+0011: 02 17 9C B9 00 08 9C 41 00 02 04 3E 03 00 00 EB CC 					(Lese 9CB9:08), (Sende)  (zähler)3E (cmd)03 (Data) 0000
+0015: 02 17 10 3E 00 03 01 00 00 00 00 00 00 00 00 00 00 00 00 74 1B 		Default response
+-----------
+      00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18
+0015: 02 17 10 70 00 03 01 02 10 00 00 00 00 00 00 00 00 00 00 6C 88 		<- Tor auf pressed
+0015: 02 17 10 78 00 03 01 01 10 00 00 00 00 00 00 00 00 00 00 6F 4A 		<- Tor auf released
+ORG:                       00 00
+0015: 02 17 10 6C 00 03 01 02 20 00 00 00 00 00 00 00 00 00 00 9B 41        <- Tor zu pressed
+0015: 02 17 10 78 00 03 01 01 20 00 00 00 00 00 00 00 00 00 00 90 4A 		<- Tor zu released
+ORG:                       00 00
+0015: 02 17 10 02 00 03 01 02 40 00 00 00 00 00 00 00 00 00 00 C9 0C 		<- Stop pressed
+0015: 02 17 10 05 00 03 01 01 40 00 00 00 00 00 00 00 00 00 00 8F 3A		<- Stop released
+ORG                        00 00
+0015: 02 17 10 48 00 03 01 02 00 40 00 00 00 00 00 00 00 00 00 29 4E 		<- Lüftunsschalter pressed
+0015: 02 17 10 4C 00 03 01 01 00 40 00 00 00 00 00 00 00 00 00 2F 89 		<- Lüftunsschalter released 
+ORG:                       00    00
+0015: 02 17 10 44 00 03 01 02 00 04 00 00 00 00 00 00 00 00 00 6F 4A 		<- 1/2 pressed
+0015: 02 17 10 53 00 03 01 01 00 04 00 00 00 00 00 00 00 00 00 24 B0 		<- 1/2 released
+ORG                        00    00
+0015: 02 17 10 0A 00 03 01 10 00 02 00 00 00 00 00 00 00 00 00 02 F9		<- Lichtschalter pressed
+0015: 02 17 10 0D 00 03 01 08 00 02 00 00 00 00 00 00 00 00 00 60 EB 		<- Lichtschalter released
+ORG:                       00    00
+-----------
+0011: 02 17 9C B9 00 02 9C 41 00 02 04 		0F04 1700 	7B 21 				<-  0F zähler, 04 cmd?  data: 1700 (licht an) oder 1701 (licht aus)
+0009: 02 17 04  	0F00 	04FD 		0A 72								<- 0F00 zähler, 04FD  04 cmd, FD result?
+
+
+###################################################################################
+# Broadcast Message
+###################################################################################      
+001B: 00 10 9D 31 00 09 12 65 00 00 00 40 60 00 00 00 00 00 00 00 10 00 01 00 00 5A 1D    	<- Licht startet
+001B: 00 10 9D 31 00 09 12 66 00 00 00 40 60 00 00 00 00 00 00 00 14 00 01 00 00 5B 99     	<- Licht an
+001B: 00 10 9D 31 00 09 12 3A 00 00 00 40 60 00 00 00 00 00 00 00 04 00 01 00 00 48 18      <- Licht geht aus 
+001B: 00 10 9D 31 00 09 12 3D 00 00 00 40 60 00 00 00 00 00 00 00 00 00 01 00 00 08 AD 		<- Licht ist aus
+                                                                  00																  															  
+------------------	
+															  
+AA: Zielwert?
+BB: Istwert
+CC: 0x40 Tor zu,  0x01 Tor öffnet, 0x20 Tor komplett auf, 0x02 Tor schließt, 0x05 1/2 öffnen, 0x80 Teilgeöffnet, 0x00 gestoppt
+    0x42(66) kurz beim schließen
+	
+	
+DD: ? Geschwindigkeit / Kraft?
+
+                                 AA BB CC                DD  	
+      00 01 02 03 04 05 06 07 08 09 00 01 02 03 04 05 06 07 08 09 00 01 02 03 04 05 06								 
+001B: 00 10 9D 31 00 09 12 53 00 00 00 40 60 00 00 00 00 00 00 00 14 00 01 00 00 44 5B 		<- Tor zu
+001B: 00 10 9D 31 00 09 12 55 00 C8 00 01 60 00 00 00 00 00 00 00 14 00 01 00 00 B2 05 		<- Tor öffnet komplett
+001B: 00 10 9D 31 00 09 12 5B 00 C8 04 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 55 61 
+001B: 00 10 9D 31 00 09 12 5D 00 C8 04 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 B5 E8 
+001B: 00 10 9D 31 00 09 12 60 00 C8 06 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 AA 49 
+001B: 00 10 9D 31 00 09 12 63 00 C8 08 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 D4 09 
+001B: 00 10 9D 31 00 09 12 65 00 C8 0A 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 B6 81 
+001B: 00 10 9D 31 00 09 12 67 00 C8 0C 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 91 3B 
+001B: 00 10 9D 31 00 09 12 68 00 C8 0E 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 20 2D 
+001B: 00 10 9D 31 00 09 12 6A 00 C8 10 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 1F 9D 
+001B: 00 10 9D 31 00 09 12 6C 00 C8 12 01 60 00 00 00 00 0E 00 00 14 00 01 00 00 7D 15 
+..
+001B: 00 10 9D 31 00 09 12 2F 00 C8 C6 01 60 00 00 00 00 02 00 00 14 00 01 00 00 4C 8F
+001B: 00 10 9D 31 00 09 12 30 00 C8 C8 20 60 00 00 00 00 00 00 00 14 00 01 00 00 55 A1 		<- Tor komplett auf
+..
+001B: 00 10 9D 31 00 09 12 11 00 00 38 02 60 00 00 00 00 09 00 00 14 00 01 00 00 4A 0D 		<- Tor schließt 
+001B: 00 10 9D 31 00 09 12 4F 00 00 16 02 60 00 00 00 00 06 00 00 14 00 01 00 00 D7 AB
+001B: 00 10 9D 31 00 09 12 53 00 00 14 02 60 00 00 00 00 06 00 00 14 00 01 00 00 92 3C 
+001B: 00 10 9D 31 00 09 12 0A 00 00 00 02 60 00 00 00 00 03 00 00 14 00 01 00 00 84 83
+001B: 00 10 9D 31 00 09 12 0B 00 00 00 40 60 00 00 00 00 00 00 00 14 00 01 00 00 D7 28 		<- Tor komplett zu
+
+
+001B: 00 10 9D 31 00 09 12 30 00 C8 00 05 60 00 00 00 00 00 00 00 14 00 01 00 00 B9 12 		<- 1/2 Öffnung
+001B: 00 10 9D 31 00 09 12 59 00 18 18 80 60 00 00 00 00 00 00 00 14 00 01 00 00 B5 41      <- 1/2 Teilgeöffnet
--- a/Investigation/bussniffer/.gitignore
+++ b/Investigation/bussniffer/.gitignore
@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
--- a/Investigation/bussniffer/include/README
+++ b/Investigation/bussniffer/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
--- a/Investigation/bussniffer/lib/README
+++ b/Investigation/bussniffer/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
--- a/Investigation/bussniffer/platformio.ini
+++ b/Investigation/bussniffer/platformio.ini
@@ -0,0 +1,14 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp12e]
+platform = espressif8266
+board = esp12e
+framework = arduino
--- a/Investigation/bussniffer/src/main.cpp
+++ b/Investigation/bussniffer/src/main.cpp
@@ -0,0 +1,81 @@
+#include <Arduino.h>
+#include <SoftwareSerial.h>
+
+
+SoftwareSerial RS485(D6,D7);
+#define RS485IF RS485
+//#define RS485IF Serial
+
+
+void setup()
+{
+  // Hörmann HCP2 based on modbus rtu @57.6kB 8E1  
+  RS485IF.begin(57600,SWSERIAL_8E1);
+  Serial.begin(115200,SERIAL_8N1);
+}
+
+#define T3_5 1750
+
+#define BUFFERSIZE 255
+int rxlen = 0;
+int txlen = 0;
+byte rxbbuffer[BUFFERSIZE];
+byte txbbuffer[BUFFERSIZE];
+
+unsigned long recvTime =0;
+unsigned long recvStartTime =0;
+unsigned long recvGapTime = 0;
+
+void sendUShort(ushort data){
+  Serial.write(data>>8);
+  Serial.write(data&0xFF);
+}
+
+int loopcount = 0;
+void loop()
+{
+  if(loopcount==0)
+  {    
+    rxlen=0;
+    rxbbuffer[rxlen++] = 0x8;
+    rxbbuffer[rxlen++] = 0xDE;
+    rxbbuffer[rxlen++] = 0xAD;
+    rxbbuffer[rxlen++] = 0xBE;
+    rxbbuffer[rxlen++] = 0xEF;
+    rxbbuffer[rxlen++] = 0xDE;
+    rxbbuffer[rxlen++] = 0xAD;
+    rxbbuffer[rxlen++] = 0xBE;
+    rxbbuffer[rxlen++] = 0xEF;    
+    
+    Serial.write(rxbbuffer,rxlen);  
+
+    rxlen=0;
+    loopcount=1;
+  }
+
+  if(RS485IF.available() >0)
+  {
+      if(rxlen==0){
+        recvStartTime = micros();
+        recvGapTime = recvStartTime-recvTime;
+      }
+      rxlen+= RS485IF.readBytes((char*)(rxbbuffer+rxlen), _min(BUFFERSIZE-rxlen,RS485IF.available()));
+      recvTime = micros(); 
+      
+  }
+
+  if(rxlen>0 && (micros()-recvTime > T3_5 || rxlen > 0x80)) 
+  {    
+    Serial.write(rxlen);                            // Len
+    sendUShort((short)recvGapTime);                 // Gap
+    sendUShort((short)recvTime-recvStartTime);    // Packagelen
+    Serial.write(rxbbuffer,rxlen);
+    rxlen=0;
+  }
+
+  if(Serial.available() >0)
+  {
+      rxlen= Serial.readBytes((char*)(rxbbuffer), _min(BUFFERSIZE,Serial.available()));
+      RS485IF.write(rxbbuffer,rxlen);
+  }
+}
--- a/Investigation/bussniffer/test/README
+++ b/Investigation/bussniffer/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html
--- a/Investigation/oszi/busscan.png
+++ b/Investigation/oszi/busscan.png
--- a/Investigation/readme.txt
+++ b/Investigation/readme.txt
@@ -0,0 +1,53 @@
+Hardware/Protocol:
+####################
+RS 485 Modbus 57,6 kB - 8E1 LSB
+IOLevel 0-3,2 V
+
+
+Protocol:
+##########
+https://modbus.org/docs/Modbus_Application_Protocol_V1_1b.pdf
+
+Request (Master):
+92	SlaveID
+17 	Function code: Read/Write Multiple registers
+9C B9 	Read Starting Address 
+00 05   Quantity to Read
+9C 41   Write Starting Address
+00 03   Quantity to Write
+06  	Write Byte Count 
+00 02 00 00 01 00
+15 D9	CRC ModBUS
+
+Response (Slave)
+92	SlaveID
+17	Function code
+05	Byte Count
+XX XX XX XX XX
+YY YY   CRC ModBus
+
+
+Antwortzeitverhalten Master<> Slave:
+min 3974 ms
+max 5916 ms
+
+
+Kommunikation (siehe ProtocolAnalyse.txt):
+nach dem BUS-Scan wird folgendes Muster immer wieder durchlaufen:
+
+Master: Statusabfrage
+	02 17 9C B9 00 08 9C 41 00 02 04 3E 03 00 00 EB CC 
+Slave:  Status des Erweiterungsboards
+	02 17 10 3E 00 03 01 00 00 00 00 00 00 00 00 00 00 00 00 74 1B 
+Master (Broadcast): Status des Antriebs
+	00 10 9D 31 00 09 12 16 00 C8 C8 20 60 00 00 00 00 00 00 00 14 00 01 00 00 BE E2
+
+
+Besondere Nachrichten:
+1. Beim Lichtschalten:
+Master: 02 17 9C B9 00 02 9C 41 00 02 04 0F 04 17 00 7B 21	<-  0F zähler, 04 cmd?  data: 1700 (licht an) oder 1701 (licht aus)
+Slave:  02 17 04 0F00 04FD 0A 72				<- 0F00 zähler, 04FD  04 cmd, FD result?  Konstante Nachricht?
+
+2. Busscan
+Master: 02 17 9C B9 00 05 9C 41 00 03 06 00 02 00 00 01 02 f8 35
+Slave:  02 17 0a 00 00 02 05 04 30 10 ff a8 45 0e df