initial commit

Investigation/bussniffer/.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

Investigation/bussniffer/include/README

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+
+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

Investigation/bussniffer/lib/README

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+
+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

Investigation/bussniffer/platformio.ini

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+; 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

Investigation/bussniffer/src/main.cpp

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+#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);
+  }
+}

Investigation/bussniffer/test/README

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+
+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