Feb 2, 2020 · Hello everyone, I'm quite new to the world of Arduino, trying to learn the code to create my RF project. Right now I have a basic script, that I'm trying to integrate with the Expander I/O shield …

Apr 4, 2018 · Hello, I am trying to use a MCP23017 I/O expander to add the number of I/O pins that are available on my Arduino Mega 2560. i am most interested in adding inputs, to detect voltage across …

Jul 18, 2021 · i use a esp8266. i would like more digital pins. could i talk to an arduino over i2c to control outputs of arduino from esp8266. How can i communicate with arduino over i2c from esp8266 vice …

Apr 28, 2021 · Hello, I'm new to arduino and I got an IO expander chip that uses SPI to communicate with the arduino but I am having a hard time making things work. I triple checked my hardware …

Dec 21, 2024 · Port expanders are for signals, they can't drive motors. So you also need motor drivers if you are using port expanders, which makes things more complex than just using the TPIC chips you …

Nov 4, 2015 · I'm trying to learn about the MCP23017 I/O Expander using my Uno board. I'm following the tutorial here: How to Connect an MCP23017 I/O Port Expander to an Arduino There is a …

Jun 8, 2012 · One IO expander chip I work with a lot is the MCP23S17 from Microchip. It is controller by SPI (they do an I²C version too), which takes 4 IO pins, and provides 16 IO pins. You can optionally …

Feb 24, 2015 · Hi to all, for my home automation project i would like to use lots of MCP23017 expander for increase digital I/O pins of arduino (in my case Yun). As i wrote in this discussion Some problems …

Oct 29, 2024 · I'm working on a project with an ESP32 and need to significantly increase the number of digital I/O pins. I've considered using I2C port expanders like the PCF8575 or MCP23017, which …

Sep 12, 2024 · Hi. Does anyone have a library for the i2c expander for use with a 4x4 keypad, no information came with pcb.