ESP32: How to Setup a Keypad and Set a Secret Code

In this video I'll explain how to connect and use an ESP32 with a keypad matrix using the Arduino IDE. I'll also reference a tutorial by DIYI0T who shows how to use the keypad to enter a password and check if it matches the master code.
Tutorial link from DIYI0T:
diyi0t.com/keypad-arduino-esp...
Have a question or comment? Leave it below or send me an email:
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Thanks for watching!

[@aberateklehaimanot9804]

thanks for explaining the code line by line,keep it up

[@BaldGuyDIY]

Thanks for watching!

[@reold]

Thanks for the video, I had just bought one.

[@BaldGuyDIY]

Good timing then! Thanks for watching.

[@SudemMumun]

My buttons from 4 to C don't work, but 1 to A and * to D do work. Do you have an idea why they don't work? I used the same pins like you did.

[@cheapnoiseinthehouse5578]

Hi. I really enjoy your videos. So I want to do a project with the NodeMCU version of the ESP-32 that requires at least 36 keys. I also need it to know when I'm pressing more than one button at once. I can not really use a matrix since only one button will be recognized at any given moment. So I should use I2C. But I haven't found anycircuit with 36 buttons. And if I want to do the project as expected, I could need more than 51 buttons. The project I'm trying to do is a small toy musical keyboard so a Raspberry pie is over kill. I will also need Gpio 25 free since I'll be using the built in 8 bit dac and a adc pin as well for a microphone. Where can I find an i2c circuit with a lot of buttons? Thanks.

[@juanfelix9974]

Is it posible to use 2 keypad in 1 esp32/8266 to control 2 selenoid door lock?

[@LucasSouza-rz2hh]

this video save me....tnnkxxx

[@BaldGuyDIY]

Thanks for watching, glad it was helpful!

[@christopherlawes9286]

Hi. Is it possible to enter Windows 10 login password using this (or similar) method?

[@BaldGuyDIY]

Thanks for watching. Check out this link I found where they turn an ESP32 into a Bluetooth keyboard emulator. hackaday.com/2020/02/13/emulating-a-bluetooth-keyboard-with-the-esp32/
There are some boards that can connect and emulate a USB keyboard easily, but the base ESP32 doesn’t do it. I believe the video also mentions them. Good luck!

[@ytjuni5374]

how to custom input , like
char 1
serial.print('F');
char 2
srial.print('Z:)
something like that

[@BaldGuyDIY]

Create if statements for each button press that you want. In the if, put the action you want to happen when the button is pressed.

[@omkarraut5045]

I am doing an analysis , But am stuck in one issue, i'm not able to take a 4 digit value from 4x4 keypad and send it to google Firebase
Can anyone please help me out? Please i need in urgent

[@BaldGuyDIY]

I’ve never used firebase, but good luck, hopefully you find the answer you need!