I recently bought a logic level converter for interfacing Arduino Uno with ESP8266. I had decided to use SPI communications between the two but after making all connections correctly it failed. After checking the shifter with a multimeter I found out the pins were high even with no signal applied (only HV and LV voltages are applied). This is fine for I2C but not for SPI. Is it possible to perform SPI with this shifter? If yes, then how?
Product link: here.