Support I2C PIR sensor connected to Grove port on M5Stack devices (M5StickC, M5StickC-Plus, M5Atom-Matrix) about espresense HOT 9 CLOSED

If you don't want the screen or led, just flash the esp32 variant and it'll all turn off (once you power it on and off).

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https://www.digikey.com/en/products/detail/m5stack-technology-co-ltd/U004/12088549 is probably not supported (I don't have one to test), but I think this will work with the existing support: https://www.digikey.com/en/products/detail/U054/2221-U054-ND/12088559?itemSeq=377364194

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Actually I take that back, both should work already just fine. Try putting 38 in pirPin. These aren't actually i2c. Can yoou test and close this?

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Excellent suggestion about just flashing the ESP32 variant. I'll try that. I do have the Grove/I2C PIR sensor and I'll test whether that works w/ the M5StickC and ATOM Lite devices I have. I'll report back here once I've done the testing.

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If I flash the M5StickC version of ESPresence on a M5StickC device and set the PIR pin to 33 (the pin specified in the M5Stack example Arduino code for the PIR UNIT), the Grove/i2c PIR sensor definitely works. But if I flash the generic ESP32 version of ESPresence on the same M5StickC and specify the same PIR pin, the PIR sensor doesn't seem to work. So I guess you can close this issue. Thanks for figuring out that the PIR "UNIT" isn't actually i2c.

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Hmm, there might be some init code we're missing then.

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Any more info? I looked through the m5 init code and don't see any explanation for what you reported. Should we close this?

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I've had a M5StickC w/ the PIR unit running for the past week (w/ the M5StickC-specific build of ESPresence) and it's been working great. I'll try to do some more testing over the next few days to see if I can figure out what init code is needed in the generic build to get the M5StickC to work w/ the PIR "unit" and/or the PIR "hat". I also have a M5 ATOM Lite that I can test w/ the PIR "unit". I don't have the adapter for the ATOM Lite that allows it to work w/ the "hat" devices, but I will probably buy some at some point. I'll also add that I've got 4 devices (2 M5StickCs and 2 ATOM Lites) running ESPresence around my house and they're working great!

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I'm going to close this for now. You can open another issue if you figure out what's the difference.

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