A schematic describing how you might build a beacon using a NodeMCU-32S, an SX1278, and an SSD1306-based I2C OLED display, both as a KiCad document and in a JPEG image. An Arduino sketch that will ...

The TTGO LoRa boards have some issues when using together with SD cards. Both the SX1278 and SD cards use SPI as communication bus. SPI is a protocol family can work in many different configurations.