And, any idea how to use them? 3 pins is perplexing.
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Certainly looks like UPDI pads. I have update the firmware on other kinds of flashlights with similar pads. You can try to connect with a test command without trying to reflash. Here is a lot of information on the topic: https://budgetlightforum.com/t/anduril-flashlight-reflash-reference/216942
