An occupancy sensing electronic thermostat is described that includes a thermostat body, an electronic display that is viewable by a user in front of the thermostat, a passive infrared sensor for measuring infrared energy and an infrared energy directing element formed integrally with a front surface of the thermostat body. The HRR module generates an HRR signal based on in-cylinder pressures of a cylinder of the engine. The patterned support layer is on the inner-front optical diffusion layer between the first electrodes. The packet may be forwarded along the MDT towards the RP based on the upstream label.