wireless repeater or access point

Oct 29, 2018
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I have wifi in building a) and there is a building which is blocking my signal. My building b) is located on the other side of the blocking building so how do I get a wifi signal in my building b) without running a cable. I need to scan barcodes and there is no signal on the other side of building b). The scan has to be read on the network in building a). What can I do?