4x4 Matrix Membrane Keypad 16 Key Keyboard Module Array Switch for Arduino ESP32

Buttons work great

I spent an hour trying to figure out the pinout on this keypad and got no where. Decided to open it up and trace it. The PCB traces were broken in several places and the pads had corrosion on them. It never would have worked even with the correct pinout. Save your money. This one is junk.

There aren't headers pre-soldered to the PCB. Pay attention to the product images because pin 1 and pin 10 are not connected. The board is sturdy and can be mounted.

arrived in good condition, easy to hook up, works great with my arduino

This is my 3rd keypad and all of them are cheap and far to fragile to be used reliably.I halve repaired traces on 2 of them and made the usable but this should never happen if manufactured corectly

I like the sturdiness of this keypad. It is great for using with a Raspberry Pi, Arduino, or other electronics project.

I bought this keypad for an arduino project. All I can say is it will be perfect for it. The keys feel great and don't require and extra hard push to be registered. And best of all, it is super easy to use. Just download the arduino keypad library, plug it in correctly, or change it for your wanting, and it just works. No hassle required! I can't wait to get started with my project now!

I received a used defective 4 x 4 keypad. The pads were covered with solder. Being a skilled electronic technician I thought I would remove the solder before returning. After removing the solder I found several of the solder pads were missing. I will avoid buying parts from DIYmalls. It's interesting this product has since been removed from the Amazon web site.