FFI Snap7

FFI Ruby wrapper for Snap7 (http://snap7.sourceforge.net/)

Under Ubuntu 14.04 (the environment I tested, but may apply to others as well), perform the following steps:

1. Download and compile Snap7 (see according documentation)
2. Copy libsnap7.so to /usr/local/lib

Add this line to your application's Gemfile:

gem 'ffi-snap7'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ffi-snap7

See examples/

Server:

server = Snap7::Server.new
server.register_db 1, 16
server.register_db 2, 16
server.start
puts 'started'

run = true
trap('INT') do
  puts 'stopping'
  server.stop
  run = false
end

while run
  sleep 0.1
end
puts 'done'

Startup:

authbind --deep ./examples/server.rb

Client:

client = Snap7::Client.new
client.connect '127.0.0.1', 0, 2
p client.db_read  1, 0, 4
client.db_write 1, 0, 4, [7, 15, 31, 63]
p client.db_read  1, 0, 4
client.disconnect

Startup:

./examples/client.rb

1. Fork it ( https://github.com/arohr/ffi-snap7/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request