See the corresponding README.md files for each tool of the tools directory. Radiobit also provides many examples of what can be achieved with its firmware: A BLE advertiser and its associated sniffer ...
Interfacing OLED matrix displays with the SSD1306 (or SH1106) driver in Python 2 or 3 using I2C on the OrangePi 2. The particular kit I bought can be acquired for a few dollars from Banggood. Further ...