Following tutorial from link
protoc - to be installed
grpc-python - installed from requirements-pip
grpc-ruby - gem install grpc (IOT to have a client in other language)
Install protoc following url form:
https://github.com/google/protobuf/#protocol-compiler-installation
In case old version is still used do: sudo ldconfig
Need to install a version of 2.0 + (google it)