Controlling Industruino/Arduino from other Computer or Phone

Hey there,

So I'm starting this project, and I want to figure out how I could control an Arduino or Industruino from another PC or phone. The goal right now is just be able to send it commands to print something from my choosing, and was wondering if I could get some guidance on how to do this. I have programming experience, but the whole network programming is completely out of my realm of knowledge. I have an Industruino with a Modbus Ethernet Expansion module with a D21G screen.

Some guidance would be greatly appreciated,

Thanks.

The industrino web site gives examples of how to make a web server or client - that will do what you want.

I cannot get it to work with the D21G. Getting serial monitor not available at com 7 errors, etc.

Any idea?