Sensor works great!
For PMW3389 Motion Sensor
I got the ADNS-9800 previously, but decided to try out the PMW-3389 since it seems to be more readily available. The only difference that affected my design was that the P3389 only works up to 3mm, while the A9800 works up to 5mm. The P3389 is also a bit smaller, and I prefer that the pins are all in one row.
Documentation is a bit lacking because it's locked behind PixArt's NDA. If you want to configure anything beyond what's shown in the Arduino sample, then you'll have to contact PixArt at https://websupport.pixart.com and ask them for the full datasheet. If you don't mind signing the NDA, then it's easy and takes about a week to get the datasheet.
Shipping took about 3 weeks. A bit slower than I expected, but reasonable considering it's coming from across the border.
Thank you for the great sensor!
