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 ...

REV D - June 2022 The I2C IO expander MCP23017 has changed according to the new data sheet. It is now described as a 14/16-bit IO expander. The pins GPA7 (7) and GPB7 (15) have lost their input mode, ...

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 ...

This is possible with an I2C multiplexer e.g. TCA9548 which creates up to eight channels (think of it as I2C subnets) which can use the complete address range of the device. Drawback of using a ...

ESP-IDFを使って、I2Cをサクッと実装しようと思ったら、理解があいまいで想像以上に時間がかかって、泣きそうになったので、ここでまとめておく。 I2CのArduino FrameworkとESP-IDFの違い I2CのESP-IDFのVer.4系とVer.5系の違い 構造体のC++とC言語での初期化の違い ...

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, ...