TTGO LoRa32 SX1276 OLED: ESP32 development board with SX1276 LoRa chip and SSD1306 0.96 inch OLED display.
adapted from an example by Rui Santos, https://RandomNerdTutorials.com/ttgo-lora32-sx1276-arduino-ide/
board: LillyGO TTGO LoRa32-OLED
libraries:
Adafruit SSD1306 https://github.com/adafruit/Adafruit_SSD1306
Adafruit GFX https://github.com/adafruit/Adafruit-GFX-Library
LoRa by Sandeep Mistry https://github.com/sandeepmistry/arduino-LoRa
Most boards operate in either the 433MHz or 866/915MHz bands. The existing code sets the 866MHz band which is not legal in North America.