An apparatus includes a tablet computing device and a radio module physically fastened to the tablet computing device. The tablet computing device has a display and is configured to establish WiFi and BLUETOOTH Low Energy (BLE) communication links with other devices. The radio module is configured to establish ISA100 and WirelessHART communication links with field devices of a process control and automation system. The tablet computing device and the radio module are configured to communicate with each other using a BLE communication link. The apparatus is configured to selectably operate in multiple modes comprising a gateway mode, a router mode, a sniffer mode, and a discovery mode.