Embedded Linux, NPI Product Industrialization, Microphone and speaker validation, 2.4 GHz 5 GHz behavior, Ethernet IEEE 802.3af 802.3at PoE, Environmental and reliability validation, Manufacturing Engineering, Image sensor contamination control, Li-ion LiFePO4 fundamentals, Product Engineering, Video CCTV device development, Image quality validation, Mechanical Testing, Burn-in testing, EMI EMC interactions, RTOS boot processes, Secure Boot, Factory production and mass-production ramp-up, Factory firmware flashing, OTA updates