quickly hacked together proof of concept stuff for virtualhomeduino

Added pigpio library support, configuration uses GPIO pin numbers instead of wiringPI pin numbers. Example configuration:

{
  "plugin": "homeduino",
  "driver": "gpio",
  "driverOptions": {},
  "enableReceiving": true,
  "receiverPin": 17,
  "transmitterPin": 18,
  "active": true,
  "connectionTimeout": 120000,
  "rfrepeats": 20,
  "debug": true
}

• assuming you compile on Debian/Ubuntu
• in order to be able to cross compile vhduino on a normal computer running Debian/Ubuntu you need to install git

$ sudo apt-get install git

$ git clone https://github.com/layereight/virtualhomeduino.git
$ cd virtualhomeduino
$ make

Makefile compile steps:

• clone Raspberry Pi cross compile tool chain (raspberrypi/tools, ~190MB)
• clone RFControl with commit 70413e8
• clone pigpio with commit 1aa4cca (V64)
• cross compile pigpio
• cross compile virtualhomeduino sources (pigpio_functions.cpp, pigpio_rfcontrol.cpp, virtualhomeduino.cpp)
• cross compile vhduino binary

• assuming you compile on Raspbian
• in order to be able to compile vhduino on a Raspberry Pi with Raspbian you need to install the pigpio package (library and source files) and others

$ sudo apt-get install pigpio build-essential git

$ git clone https://github.com/layereight/virtualhomeduino.git
$ cd virtualhomeduino
$ make -f Makefile.rpi

Makefile.rpi compile steps:

• clone RFControl with commit 70413e8
• compile virtualhomeduino sources (pigpio_functions.cpp, pigpio_rfcontrol.cpp, virtualhomeduino.cpp)
• compile vhduino binary

• the vhduino binary is dynamically linked
• assuming you want to run vhduino on Raspbian you need to install the pigpio package

$ sudo apt-get install pigpio

• build the project as described above
• assuming you have the pimatic homeduino plugin installed
• copy the vhduino binary to the plugin's directory on your Raspberry Pi, e.g.:

$ sudo cp vhduino /home/pi/pimatic-app/node_modules/pimatic-homeduino/node_modules/homeduino/bin/vhduino

• exact procedure would be:
  • stop pimatic
  • backup the old vhduino binary in the homeduino plugin directory
  • copy the new vhduino binary to the homeduino plugin directory
  • start pimatic
  • adapt receiverPin and transmitterPin configuration in homeduino plugin (pin numbering changed from wiringpi to pigpio)
  • restart pimatic

• Can cross compiling be achieved "easier"?
  • without cloning 190MB of Raspberry Pi tools repository
  • check https://hackaday.com/2016/02/03/code-craft-cross-compiling-for-the-raspberry-pi/
• use autoconf/automake to generate configure file and Makefile

• WebWire-NL: migrating the whole project to pigpio making it compatible with newer kernels(>=4.9.x)
• layereight: improving the project's build process