How to use 5x4 20 keys keypad with Arduino detect String

[@romainedixon4560]

Arduino is such a versatile and powerful tool

[@robojax]

yes indeed.

[@electronic7979]

Elinize sağlık. Eğitici ve faydalı bir video olmuş. Keyifle izledim.

[@robojax]

Teşekkür ederim. Güvende olabilirsin.

[@webslinger2011]

Opens up a lot of possibilities. Thanks!

[@robojax]

yes indeed. I spend almost two days to write this code.

[@SunilJeurkar]

Worked for me , but had to change pins as below byte rowPins[ROWS] = {10,9,8,7,6}; //connect to the row pinouts of the kpd byte colPins[COLS] = {2,3,4,5}; //connect to the column pinouts of the kpd

[@robojax]

Thanks for sharing

[@Delorean29]

So 20 push buttons brilliant print only they are enough with 2 threads in total?

[@OcenaSoft]

Amazing Video, thanks again for your time and expert advice!

[@robojax]

You are welcome. It is my pleasure.

[@seafax]

That's a nice one, thanks. :-)

[@robojax]

You are welcome.

[@Delorean29]

Can I use DF player to this & keypad 5 X 4 to 2717 - I2C multiplexer, Adafruit & activate 20 sounds??

[@robojax]

The whole pint was to be able to get which key is pressed. Now you can do whatever you want. Process the key pressed and take action.

[@robojax]

You can if you know how to use it. Using I2C you can control 128 devices.

[@604smit]

nice video Robojax ,good explanation! where to find (your) library keypad?

[@robojax]

Thank you very much Leo. the library link was missing and I just fixed it. I appreciate it.

[@jeffvenqueleir2036]

nice video like always

[@robojax]

thanks.

[@arvindh13]

Will it work if we press two or more buttons at same time? Do you suggest any modifications?

[@robojax]

No. It won’t

[@dienau6313]

there is a problem sir, I use arduino nano instead of uno, but I still connect the wires into nano as same as uno( 2 -> 10). However, after uploading the code, I opened the serial monitor and it just showed: Robojax 5x4 keypad Key: LEFT and didnt show anything else although I pushed other buttons. may you help me please?

[@robojax]

Hi, it should work with any board. check ht ewiring.

[@bigcatdairy]

is there any way to do the samething in simulink?

[@robojax]

of course there is way but you gotta define shape or buttons, take action, read and do something. But you cant' transfer this code to Simulink.

[@bigcatdairy]

@@robojax yes, really looking forward to see the matrx keyboard block in simulink

[@maxlindstrom5435]

I use to connect with I2C PCF8574 to save some I/O on the Arduino. Will it work also with this Keypad (5X4) ?

[@robojax]

it should work with any input that Arduino reads. yes.

[@lucianoamorim5175]

does not compile to esp32

[@rakeshgupta-nh2hu]

How to control with matrix keypad LCD display, like press 1 -came - Kerala press 2 came Mumbai many more state name comes after press only number, need for business

[@robojax]

you need write your own code or hire someone.

[@rakeshgupta-nh2hu]

@@robojax can u help

[@usahapetani9743]

👍

[@robojax]

😊 Thanks.

[@cpsanjana]

How to write 11 and 111?

[@robojax]

create two variables called char code[3]='1','1','1'; and char readCode[3]; then when every allow use to enter 3 time something. every time save the entered value into readCode array. after 3 times compare each elements of readCode with code and if they all match, do something like turning ON relay or something else. good luck.

[@cpsanjana]

@@robojax thanks I will try

[@cpsanjana]

@@robojax thanks I will try