This is an example test library for the Epson XV7211BB using the 4-wire SPI interface. It is developed on the Arduino Zero or Teensy 3.6 development board (Teensyduino) and includes example ...

ESP32 には 4 つの SPI コントローラ（SPI0〜SPI3）が搭載されています。しかし、実際にユーザーが任意に使えるハードウェア SPI は 2 本（HSPI / VSPI） だけです。本記事では、Arduino IDE・ESP-IDF の両方に共通する SPI 使用上の注意点 を整理します。 🧩 ESP32 の SPI ...

The SparkFun Fingerprint Sensor - FPC2534 Pro is a small, highly capable and robust fingerprint sensor that can easily be integrated into virtually any application. Based off the AllKey Biometric ...

To prevent data corruption when using multiple SPI devices on the same bus, care must be taken to ensure that they are only accessed from within the main loop, or from the interrupt routine, never ...

In case you missed it, the big news is that a minimal Arduino core is up and working on the ESP32. There’s still lots left to do, but the core functionality — GPIO, UART, SPI, I2C, and WiFi — are all ...