Howto add a 4×4 keypad to a Raspberry Pi with an MCP23017 and Python
Tuesday, January 27th, 2015Touch screens are great. Keyboards are often necessary. But what if all you need is a numeric keypad?
(click on image for larger version)
In my latest article, I show you how you can easily add a 4×4 keypad to your Raspberry Pi using an MCP23017 I/O expander and Python.
All the medicine is made with Sildenafil that is the reason; all of the https://energyhealingforeveryone.com/viagra-1616.html buy brand cialis should be taken before an hour of intercourse. Today, the pharmaceutical market is loaded with some viable and effective anti-impotent drugs used to strengthen the quality of erection lowest price for levitra during intercourse. It is suggested to the victims of this issue is just to find out a viagra purchase buy better and a lot more safer to opt for chiropractic treatments which involve no drugs. There are here order levitra many online pharmacy stores which offer free home delivery along with heavy discount for kamagra jelly as there are high discounts offered at these online drug stores.
I also present a very easy to use Python library to read the keypad.
https://www.mikronauts.com/raspberry-pi/raspberry-pi-i2c-4×4-matrix-keypad-with-mcp23017-and-python/
