Assembly and wiring

Subsequently, all operating resources were properly assembled according to the wiring diagram. Then, the operating resources were wired according to the EPLAN wiring diagram. Terminal blocks were used for this purpose. Attention was paid to the selection of the correct conductor color and cross-section according to DIN VDE 0100-520 and DIN VDE 0113-1. These details are also depicted in the wiring diagram. Next, the Climate Cube and the 4-relay module were wired. The control connections of the 4-relay module were directly connected to the Raspberry Pi using jumper cables. The sensors and LEDs of the Climate Cube were plugged into a breadboard and also connected to the ESP32 using jumper cables. The breadboard was assembled from two smaller breadboards to utilize every pin of the ESP32 because, by design, only one side could be used otherwise. The sensors for capturing the room climate were placed as close as possible to one of the two walls with ventilation holes to obtain accurate measurement data later on. The two LEDs were placed centrally and symmetrically to evenly illuminate the Climate Cube. Lastly, the terminal blocks and operating resources were labeled according to DIN EN 81346, in compliance with standards, and warning signs for electrical voltage were installed according to DIN VDE 0113-1.

Figure: Cables and tools from Pixabay