This program reads the serial data written by a mightyohm.com Geiger counter and display the information on an SSD1306 OLED screen using a SPI interface.
It is made to run on a Teensy LC but could probably be adapted for most Arduino compatible boards.
The program is built using
teensy_builder. Just run
teensy_builder at the root of the project to build and upload it to a Teensy
LC board.