Problem using IMX477 Autofocus rev N1

Nvidia Jetson Nano/NX Cameras jetvariety-cameras-on-jetson-nano
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  1. Where did you get the camera module(s)?
    UCTronics using the Arducam Link

  2. Model number of the product(s)?
    B0273

  3. What hardware/platform were you working on?
    Raspberry PI CM4 using custom carrier board

  4. Instructions you have followed. (link/manual/etc.)
    Everything I could find online

  5. Problems you were having?
    The system was working fine using an older “rev N” version of the board. When we ordered more for production, the “N1” boards produce video, but the autofocus doesn’t work. What changes were made between the “N” boards and the “N1” boards that would affect the autofocus communications? Anything we should consider, e.g. I2C bit rate, address, etc.?