Wireless communications for Industrial Internet of Things (IIoT) enable seamless data transfer between machines, sensors, and control systems. Technologies like Wi-Fi, 5G, LoRaWAN, and Zigbee provide connectivity in industrial environments. They support real-time monitoring, automation, and predictive maintenance. Wireless IIoT solutions enhance efficiency, reduce downtime, and enable remote management. Security and reliability are critical for maintaining robust IIoT operations.