I bought 4 of these (not all from the same seller) and all the temp sensors were fine but NONE of the USB RS485 ports worked. I found online where EPEver informed another person that the recently shipped (that's June 2019) adapters were incorrectly connected and the black and yellow wires needed to be swapped. I did it and Viola!, it worked. I still have 3 that don't work and one with tape that WORKS.
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