Bluetooth Module-Based Device Development

Microcontroller low-power design is a key technology for battery-powered products, mainly including the following aspects: 1. Clock Management: - System Clock: Switch between different frequency clocks according to work requirements - Peripheral Clock: Turn off unused peripheral clocks - Sleep Clock: Use low-speed clock in sleep mode 2. Peripheral Control: - Turn off power to unused peripheral modules - Set GPIO to analog input to reduce leakage - ADC, UART and other modules switch on demand 3. Sleep Modes: - Idle Mode: CPU stops, peripherals continue running - Power-down Mode: Most modules stop, only wake-up sources retained - Deep Power-down: Almost all modules stop, lowest power consumption 4. Wake-up Mechanism: - External Interrupt: Buttons, sensors and other external signals wake up - Timer Wake-up: RTC timer wake-up to execute tasks - Other Wake-up: UART, touch and other event wake-up Design Tips: - Reasonably allocate work and sleep time ratio - Select low-power devices, pay attention to device power parameters - PCB design should reduce leakage paths - Software algorithm optimization, complete tasks quickly then enter sleep

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