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Hello, Thank you for reaching out, I am not sure why my question was formatted with no info or picture so I hope I can re upload this problem. This is a screenshot I took from the HDC1010 datasheet, and at the bottom of the device there is an area marked in red which is not connected to anything, and there is no explanation on that area in the datasheet. Since I am designing a PCB board, I would like to know whether including this area in is important for the working of the device. Hope to receive your feedback :)