This project is intended to provide a more complete example for the DS18B20 temperature sensor driver: https://github.com/fuchsnj/ds18b20
In this example a STM32F3DISCOVERY is used. This is a development board of STMicroelectronics: https://www.st.com/en/evaluation-tools/stm32f3discovery.html
The data pin of the DS18B20 is connected to pin PA1 of the STM32F3DISCOVERY.