There is not much about this module. There is not much about the OPT101 sensor itself. Here is a link to a module: https://www.aliexpress.com/item/32720009584.html
It came to me unsoldered. On breakout board, there are four pins: VCC, GND, 1M, OUT, -V and COM. Besides, on top, there are CEXT and REXT pads. I believe these are for external capacitor and resistor. But which ones, and are they important? On the bottom, there are a few more pads.
Is there a way to use it with Arduino? I mean, of course, there is a way. But, some tutorials or examples would be nice.