IIoT Dual-Switch is a dual relay control base in the M5 ecosystem designed for the Industrial Internet of Things (IIoT) field. Based on the BASE26 design of M5 industrial control products, it adds a dual relay control module on top of the original customizable structure and is hardware compatible with M5Stack’s unique module stacking system, making functional expansion easier. The kit offers a variety of communication module options (such as LoRa, GSM, LTE, etc.), enabling the construction of stable and reliable industrial IoT control nodes.