There are also Bluetooth buttons or "panic buttons" that you could keep in a pocket or on a necklace or bracelet and they would trigger the nearby phone to send a message which would have redundant wifi and cellular network available. Possibly more reliable, smaller, and commercially available. Yup...

There exist alert buttons like you describe. I have purchased them in the past. And they xan activate a relay (sold as a pair) Thanks, Tom, but the button isn’t the tricky part; it’s the SMS. You jogged my memory of those wireless fobs, however (like these: https://www.adafruit.com/?q=315mhz&sort=B...

My wife and I just installed a small gym in our backyard. It's occurred to us that if either of us had an accident out there, there would be no way for the other to know. I've been thinking about how to deal with this issue, assuming the victim were still capable of minimal movement, but not able to...

@mjmorrison were you ever able to get copercini’s code to work?

Perfect. Looks like just what I was looking for. Thanks.

I'm working on an Arduino project in which I'd like to use the ESP32 in access point mode and, ideally, have it send the user's browser a web form as soon as the user connects to the network. This is how a lot of public networks work (e.g. hotels). All the tutorials I've come across, though, require...

Ah, got it. Thanks.

That looks like it. Still doesn’t look like it’s fixed, though.

I've seen some references online to a bug in early versions of the ESP32 that prevented it from waking from deep sleep after a random number of sleep sessions. Does anybody know if this is still an issue, and if not, how someone can tell if their part has the bug or is fixed? Thanks,

I'm developing some code that I want to put into deep sleep. According to what I've read, the configuration instruction should be as follows: Serial.println(esp_deep_sleep_enable_ext0_wakeup((gpio_num_t)RTC_IN, 0)); // 1 = active high, 0 = active low. In my application RTC_IN is the pin through whic...