HTTP GET help please

Is there anyway to send an http call to another LAN hosted app? I am trying to integrate hubitat with HAM Bridge.

Here are some example apps:

http://scottinpollock.us/ham-bridge-and-smartthings.html

Interestingly enough, the code supplied in the example seams to work except this line:

sendHubCommand(new physicalgraph.device.HubAction("""GET /?${settings.HAMBcommand} HTTP/1.1\r\nHOST: $ip\r\n\r\n""", physicalgraph.device.Protocol.LAN))

Can anyone help me figure out what it needs to be on hubitat?

Change all references of physicalgraph to hubitat.