Datasheet

The Grove 12 button Capacitive Touch Keypad is built around the ATtiny1616, an AVR® 8-

bit processor running at up to 16 MHz. ATtiny1616 is a low-power, high-performance chip

integrated QTouch® peripheral touch controller which supports capacitive touch interfaces

with proximity sensing and driven shield. With this module, you can easily create an Arduino

password keypad or a DIY phone keypad.

This keypad is made into a 3x4 form, just like the layout of a mobile phone keyboard. The

traditional keypad requires 3 vertical lines and 4 horizontal lines to scan, which will occupy 7

I/O pins of the microcontroller. With the help of ATtiny1616 and Grove connector, only RX

and TX two pins are enough for Grove - 12-Channel Capacitive Touch Keypad. You can easily

use this module with a microcontroller with a hardware UART interface, or you can use the

software UART to read the button input with two normal I/O pins.

All in all, the Grove 12 button Capacitive Touch Keypad is an easy-to-use module that requires

very little code, especially when you use it with Grove compatible mainboards, no soldering,

just plug and play.

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The Grove 12 button Capacitive Touch Keypad is built around the ATtiny1616, an AVR® 8bit processor running at up to 16 MHz. ATtiny1616 is a low-power, high-performance chip integrated QTouch® peripheral touch controller which supports capacitive touch interfaces with proximity sensing and driven shield. With this module, you can easily create an Arduino password keypad or a DIY phone keypad. This keypad is made into a 3x4 form, just like the layout of a mobile phone keyboard.
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Features       Low Power ATtiny1616 controller 3.3V / 5V compatible Capacitive touch, high sensitivity 12 button keypad 4 pin Grove UART connector On-board LED indicator Applications    Phone keypad Password access Extended input interface Hardware Overview Figure 1.