The PCM51xx can be used in hardware or software configuration mode. To set software configuration mode, set the pins MODE1 and MODE2 to select I2C / SPI mode. This library only supports I2C mode at ...

An Arduino library for the I2C mode of ultrasonic distance sensors RCWL-1605, RCWL-1005, and probably HC-SR04P, with some extra info - ftjuh/RCWL_1X05 ...