TECNOIOT 5pcs SN65HVD230 CAN Bus Communication Transceiver Module

After troubleshooting my project code and soldering for hours, i was left to test these boards after setting a test bench up for them and already having a working SN65HVD230 board from another source i verified the set up which worked as expected, however, every one of these boards failed, with a couple of the boards outputting a square wave on the receive pin without any input.in short they all DO NOT work!! don't waste your time and money