Description Unit NBIoT2 is an NB-IoT wireless communication module suitable for global Cat-NB frequency bands. It features the built-in SIM7028 communication module, uses serial communication controlled through AT commands, and integrates an SMA external antenna interface to improve communication quality and signal stability. The SIM7028 module supports multi-band NB-IoT network connectivity for worldwide applicability. Designed for low-latency and low-throughput applications, it also provides excellent power management capabilities, making it suitable for long-term IoT devices such as smart metering, remote control, asset tracking, remote monitoring, telemedicine, and shared bikes. Features Global version with multi-band Cat-NB support Built-in SIM7028 communication module Strong signal access capability AT command control Nano SIM card support External SMA antenna interface UART serial communication at 115200bps Cat-NB frequency bands: B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B26/B28/B66/B70/B85 Data transfer rate: 127kbps downlink / 159kbps uplink Network protocols: TCP, UDP, HTTP, TLS, DTLS, DNS, NTP, PING, LWM2M, COAP, MQTT, MQTTS, SSL Specifications Specification Parameter SKU U111-B Communication Module SIM7028 Supported Cat-NB Bands B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B26/B28/B66/B70/B85 Network Protocols TCP/UDP/HTTP/TLS/DTLS/DNS/NTP/PING/LWM2M/COAP/MQTT/MQTTS/SSL Operator Certifications Deutsche Telekom, Vodafone, Telefonica, China Telecom, China Mobile, China Unicom Communication Method UART 115200bps Standby Current DC 5V / 3.1mA Network Current DC 5V / 36mA Product Size 71.5 x 24 x 8mm Package Size 136 x 92 x 13mm Product Weight 12.4g Gross Weight 25.5g Interface Uses HY2.0-4P Grove connection Designed for PORT.C connection Uses UART serial communication Supports Nano SIM card Uses an SMA external antenna interface Applications Remote control Asset tracking Remote monitoring Smart metering Telemedicine Shared bikes Product List 1 x Unit NB-IoT2 1 x SMA Antenna 1 x Hex Wrench 1 x HY2.0-4P Grove Cable (20cm) Other Content Unit NBIoT2 uses the SIM7028 module. Compared with SIM7020G, SIM7028 supports more frequency bands and slightly higher data transfer rates, making it suitable for more markets and higher bandwidth NB-IoT applications. Resources Official Documentation Unit NBIoT2 Schematics PDF SIM7028 Specification SIM7028 AT Command Manual Unit NBIoT2 Arduino Library Unit NB-IoT2 UiFlow2 Docs Official Product Video FAQ What communication module does Unit NBIoT2 use? Unit NBIoT2 uses the SIM7028 communication module. What SIM card type does it support? It supports Nano SIM cards. What communication method does it use? Unit NBIoT2 uses UART serial communication at 115200bps and is controlled through AT commands. Does it support an external antenna? Yes. Unit NBIoT2 includes an SMA external antenna interface and comes with an SMA antenna. What Cat-NB bands does it support? It supports B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B26/B28/B66/B70/B85. What is included in the package? The package includes 1 x Unit NB-IoT2, 1 x SMA antenna, 1 x hex wrench, and 1 x HY2.0-4P Grove cable.
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