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File (hide): 9bcbd7fd9033870⋯.jpeg (7.45 KB, 192x192, 1:1, download.jpeg) (h) (u)

[–]

▶Paxcounter Anonymous 06/22/19 (Sat) 01:45:07 No.1072016>>1072222 >>1072239 >>1072324 >>1072353 [Watch Thread][Show All Posts]

Can the ESP32 be used as a low powered wifi RSSI sensor. I.E. turn on an led when a device comes within a certain proximity?

I am running off battery here. I want to detect phones sort of like a paxcounter

▶Anonymous 06/22/19 (Sat) 20:18:45 No.1072222>>1072243

File (hide): c495de239ea634b⋯.jpg (80.19 KB, 319x349, 319:349, ApplicationFrameHost_2019-….jpg) (h) (u)

>>1072016 (OP)

not rssi but check this anon

https://null-byte.wonderhowto.com/how-to/detect-when-device-is-nearby-with-esp8266-friend-detector-0188642/

I wish there was moar micro controller threads here, or a place we can talk about micro controllers.

▶Anonymous 06/22/19 (Sat) 22:38:52 No.1072239>>1072243

>>1072016 (OP)

I have its predecessor the ESP8266, and a 2MP Camera daughter board and I've never found any practical use for it.

▶Anonymous 06/23/19 (Sun) 00:17:06 No.1072243

File (hide): 2e296ef530dd83f⋯.jpeg (11.78 KB, 360x360, 1:1, download (1).jpeg) (h) (u)

>>1072222

Checked

>>1072239

I would like to set up a device. Perhaps in a tree or out of reach. When someone walks by with their phone the "trail cam" turns on a wifi hotspot they can access to view a server webpage with a timelapse on it.. or they just press a button and it turns on the hotspot. Just some ideas for you I guess

I also picked up pick related and a couple long range wifi boards today and haven't found a use. Maybe some kind of sensor for my dads storage facility

▶Anonymous 06/23/19 (Sun) 10:13:31 No.1072324

>>1072016 (OP)

>phone has bluetooth enabled

>phone's bluetooth name is known

>esp32 searches for list of known names

>lights up LED if signal strength exceeds set amount

>esp32 then goes into some sleep mode and repeats the above 2 steps every predefined interval to save power

▶Anonymous 06/23/19 (Sun) 10:19:03 No.1072325

You'll have to use deepsleep somehow. One of the answers here may be useful: https://stackoverflow.com/questions/39481196/how-to-wake-esp8266-from-deep-sleep-without-continuous-resets

Its for ESP8266 but the solution works for both.

▶Anonymous 06/23/19 (Sun) 12:30:01 No.1072353

>>1072016 (OP)

>turn on an led when a device comes within a certain proximity?

>I want to detect phones

There's cheap chink led key-chain toys for cell phones that do that.

https://en.wikipedia.org/wiki/Mobile_phone_charm

>There are a variety of charms available, such little figurine characters, rhinestone crystal charms, and small teddy bears. Some charms flash or light up when the phone rings

/tech/ - Technology★

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