The STM32F100C8T6B is a popular microcontroller in the STM32 family, offering performance, flexibility, and cost-effectiveness for a wide range of embedded applications. However, like all electronic systems, users often encounter issues during development or deployment. This article explores the most common troubleshooting problems faced when using the STM32F100C8T6B microcontroller and provides effective solutions to resolve them, ensuring a smooth development process and reliable performance.