MCP23017 with Adafruit Library
In a previous post, I have shown you how to use the MCP23017 16 Port I2C I/O Port extender with the standard Wire library, as… Read More »MCP23017 with Adafruit Library
October 2020
A Business Card with a Purpose
I recently got some inspiration from the JLCPCB User Group on Facebook. Catherine showed off her PCB style business card, and I just had to… Read More »A Business Card with a Purpose
ESP32/ESP8266 WiFi Config and OTA on Demand
While working on a recent project, using a custom version of the ESP32, I had a particular need to be able to update the firmware… Read More »ESP32/ESP8266 WiFi Config and OTA on Demand
Using the MCP23017 to increase your GPIO’s
Today I will show you another useful IO Expander chip, The MCP23017. This chip, although similar to the PCF8475, which I have already covered in… Read More »Using the MCP23017 to increase your GPIO’s
Using I2C with a 4×4 Matrix Keypad
Using a matrix keypad is a very easy way to add multiple control buttons to a project, be it to enter a password, or to… Read More »Using I2C with a 4×4 Matrix Keypad
ESP8266 and ESP32 AT Commands
In this tutorial, I’ll show you some of the important and frequently used ESP8266 AT Commands or AT Instruction Set. ESP8266 WiFi Module offers… Read More »ESP8266 and ESP32 AT Commands