A new concept in distributed control systems called Wireless Ad-hoc Control Networks (WACNets) is developed. WACNets is formed by a collection of nodes with the ability to sense, actuate and control. The network does not have a fixed structure, but evolves and self organises itself according to the control requirements of the system. The service discovery developed for WACNets is reported. A review of the existing Service Discovery Protocol (SDPs) including Jini, Salutation, Universal Plug and Play (UPnP), and Bluetooth technology is carried out. An overview of WACNets is provided. The service discovery protocol developed for WACNets is introduced and its characteristics are described. Some results are provided.