2026 DIY Smart Doorbell: Face Recognition + WeChat Push (Cost <¥300)
DIY a smart doorbell with Raspberry Pi + camera module, integrating AI face recognition and WeChat message push functionality. Total cost under 300 yuan, can automatically identify family members, alert in real-time when strangers ring, and notify instantly when deliveries arrive. Includes complete hardware list, Python code, and WeChat ServerChan push configuration tutorial, a security project that can be completed over a weekend.