Abstract: We develop Process Automation Wireless (PAW) modules to interact with the communication protocols Bluetooth, Wi-Fi, PLC, Ethernet, USB, RS-485, IrDA designed to monitor the status of objects, enterprises and public buildings automation through information collection and transmission from external sensors, automatic retransmission of data transmitted, etc. The study describes how to choose an operating system for the wireless single-chip microcontrollers of lowest price range.