An apparatus and method for receiving data in a communication system are provided. Fixation to the body surface is preferred for treatment using the device is preferred. Once instructed to do so over the narrow band signalling channel, the wireless device wakes up the rest of its wide band receive circuitry. The invention relates to a process for the detection of an analyte using such a sensor, comprising implantation of the sensor into the skin of a mammal, transdermal detection of analyte using external optical means, degradation of the biodegradable material, ingestion of the particles by macrophages, and removal of the particles from the site of implantation by macrophages . The drywall is then removed from the marking sheet, and the user cuts the opening in the drywall.