Auto Login to Laptop using 24GHz Human Presence Detection Sensor
I love to automate my task and I always prefer to do it using Hardware even if I have a software solution for the same. But why?? That's because hardware is cool. So, like any human being on the planet Earth, I do also have secured my Laptop using a password and to make it more safe I have used a password long enough which make me bore when I have to enter it after every break which I take after every 20-30 mins. I also want to make the solution looks cool if some of my friends visit to me.
ESP32-BLE-Keyboard-master (1).zip This section is more interesting. Why? Let me explain…..
So, I spend more than a month writing the code for the sensor using the library, but there was something which I wasn't able to correct as a result of which I was not able to make it work using the UART connection of sensor but luckily we have the documentation of sensor. After reading about the same I got to know about sensor's IO1 and IO2 pins which made the code so simple that I completed the whole project in just 10 mins.
And the best part is I have not even used the sensor's library. If you have ever written any arduino code by yourself, you will be able to understand my code very easily.
ENJOY!
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#include <BleKeyboard.h>
BleKeyboard bleKeyboard;
int in= 4; //pin of ESP32 board to which sensor's IO pin is connected
bool trial = true;
void setup()
{
Serial.begin(115200);
pinMode(in, INPUT);
bleKeyboard.begin();
}
void loop()
{
if(bleKeyboard.isConnected()) {
int val = digitalRead(in);
Serial.println(val);
if(val == HIGH && trial==true){
bleKeyboard.write(KEY_RETURN);
delay(1500);
bleKeyboard.print("ABFKODFSG[O"); //Change your password here
delay(200);
trial=false;
}
}
}
You might be think I forgot this step?
Actually not, if you have read the code which you should. Then, you might have already guessed the connection diagram. That goes something like this
ESP32 Board ---------- mmwave Radar SENSOR
GND--------------------------G
3V3---------------------------V
D4-----------------------------IO1
That's it!
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NOTE: This device works without connecting it to the PC using wire, it's acting as BLE HID device, I'm using a wire just to power it up. You can use any battery to do the same and then connect the device using bluetooth :)
