This project is an Arduino-based calculator that uses a 4x4 keypad for input and an I2C LCD for output. The calculator can perform basic arithmetic operations such as addition, subtraction, ...

ラズパイやArduinoでセンサーなどを使うときにI2C通信がよく使われています。この場合、ラズパイやArduinoがマスターで、センサーがスレーブになって、マスターからスレーブのデータを書き込んだり、データを読み出したりします。 センサーなどの代わりに ...

以前、記事にした「I2Cキーパッドきっと」ですか、すでにM5Stackで運用しているシステムに、Groveコネクタで接続して、組み込もうとしたのですが、どういうわけか動作が不安定で困りました。 Keypad_I2Cライブラリの付属のHelloKeypad_I2Cは問題なく動作するのに ...

Arduino password system using an I2C keypad with a PCF8574 I/O expander and a 20x4 LCD. Enter a password using the keypad; correct or incorrect status is displayed. The # key submits the password, and ...

The I2C (Inter-Integrated Circuit) bus is a synchronous serial communication protocol that allows multiple electronic components (sensors, displays, memories, etc.) to be connected within the same ...

Assume that you are moving towards a complex microcontroller project bundled with blinkers, beepers, and a display panel. To link a standard 16×2 LCD directly with the microcontroller, for instance ...

[Johngineer] found himself in need of an I2C sniffer, but didn’t have one available. Necessity is the mother of invention, so he put together this I2C sniffer sketch for Arduino. The arduino will ...

This articles describes how you can use I2C (TWI) communication, Arduino and temperature sensors to measure 3 different temperatures. It can be very helpful when you want to measure the outside, ...