Review on HiLetgo PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Development Module (2pcs) by Johnny Spencer

I bought these after reading some bad reviews about grounding the address pins on the board. I was hoping that the manufacturer would fix the issue after so many negative reviews but they didn't fix it. The boards I received also had some of the address pins grounded, so flipping an address jumper will result in a short between VCC and GND. This is an obvious oversight by the manufacturer that could potentially cost you big bucks due to damaged parts. You must recall and replace all inventory. BTW, the boards I received had the name "WaveShare" on the back, I'm not sure if that means anything. there is no short circuit between VCC and GND!