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  • They also use 15 bit words, which I'm not even sure the Arduinos SPI supports. I'd just bitbang the protocol, and use different pins for the two sensors. Commented Dec 18, 2016 at 18:44
  • Sounds like a plan. But again, it does not look like a SPI bus device. I know the web page you linked to / bought the device from lists SPI. But I believe this to be in error. The Chip Select or Slave Select line on a SPI bus is necessary! It is the only way for the slave and master SPI devices to synchronize. With out this line, if either device looses sync, they will never be able to talk to one another with out being power cycled. Commented Dec 18, 2016 at 21:12