Fig. 1.

(a) Front-view and side-view of the iThermowall. (b) Detail parts of the thermometer: 1) front case, 2) OLED display, 3) green LED, 4) red LED, 5) infrared proximity sensor module, 6) infrared thermometer sensor module, 7) active buzzer, 8) battery holder, 9) tripod connector, 10) Arduino microcontroller, 11) charger module, 12) lithium-ion battery 18650, 13) switch, 14) step-up converter, 15) back case. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)