Choosing the right IoT gateway is critical for industrial deployments. Key criteria include edge computing capability, mainframe vs embedded Linux (including Yocto), hardware architecture (ARM vs Intel, i.MX SoCs), debugging options, interfacing support (ADC, I2C, SPI, UART, CAN), configurability, and memory sizing. Off-the-shelf gateways from major vendors tend to be generic and may require additional MCU hardware to handle raw sensor protocols, adding cost. When standard offerings fall short — especially for real-time ADC sampling across multiple channels — designing a custom gateway becomes the practical choice.
