There was a very cool article recently published on Habré, so I’m telling you 🤌 What has…

A very cool one came out here recently article on Habré, so I’m telling you 🤌

What hasn’t been done already on the ESP32 base. Smart thermometers were collected. They made a smart garland. Yes, even mine modified delivery robots run on ESP32 ( and your love for them ) 😍

But there is a man who went further and assembled... a radar radar ( not really radar because that's not how they work, but that's me choking ) 🤯

All this beauty uses Wi-Fi and RSSI. @cnet I checked this in practice and placed the board vertically ( horizontal polarization of the antenna, yeah ), calibrated the sensitivity, and got a sensitive motion sensor that reacts even if you just move your hand in the room. It will also send you a message about this 🤩

Technically, it is not even exactly a radar in the classical sense, but rather an electromagnetic “fog analyzer.” The movement of an object changes the reflections and refractions of the Wi-Fi signal in space, and the ESP32 catches this. All this thanks to the Channel State Information, if you're lucky, or the Received Signal Strength Indicator, if you're unlucky. In the author's case, CSI did not start, but RSSI worked as it should ❤️

Problems? And when was it without them? Wi-Fi interference, reflections from the walls, a neighbor who suddenly went into the kitchen... but no, everything turned out to be stable and works smoothly in the room. Moreover, it is so sensitive that, if desired, you can check for a cat that jumps onto the table at night. Innovation in action 🙂

Now let's think for a minute 😏

If a regular ESP32 can be used for radar, albeit a primitive one, then what guarantees do we have that such “sensors” are not already hanging somewhere in the corridors, utility rooms or meeting rooms? What doesn’t intercept our movements, behavior, gestures, even without a video camera? In an era when the “smart home” surrounds us on all sides, and microcontrollers are quite cheap, the concept of privacy is becoming increasingly illusory 😳

So, once again I repeat that security is not only about passwords and updates. This is also about what physical devices are near you. After all, even without a microphone and camera, you can get a large amount of data about you. Welcome to the RF era 💀

As they say here "if you are an IB, but not paranoid, then you are a bad IB" . Good night everyone 😉

#internet_things
#information_security