STM32 Toaster Oven Controller

Appliance-style control is a classic embedded problem: debounce inputs, manage timed heating states, and respond safely to temperature feedback without blocking the MCU.

• Clear finite-state-machine architecture
• Button and ADC temperature input handling
• Timed control states for heating cycles
• Readable Embedded C on STM32

Inputs (buttons, ADC temperature) → FSM (idle, preheat, bake/toast states, fault/done) → outputs (heater drive indicators / control signals) with timing services.

The controller is organized as an explicit state machine in C. Each state defines entry actions, transitions, and timing requirements. ADC readings inform temperature-related transitions.

• FSM over ad-hoc flags for predictable behavior and easier testing
• STM32 as a representative industry MCU platform

Exercised state transitions with button sequences and simulated/ADC temperature inputs, verifying timing and control-state behavior.

Completed an STM32-based FSM controller demonstrating structured embedded design for a temperature-control appliance model.

• Debouncing and input edge cases
• Keeping timing accurate without busy-waiting
• Safe handling of unexpected state paths

Explicit states and transition tables make embedded control far easier to reason about than deeply nested conditionals.

• PID temperature regulation overlay
• Soft-start heater drive
• Logging/telemetry for lab demos