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Unit NBIoT2

SKU:U111-B

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 via AT command set), and integrates an SMA external antenna interface, significantly improving the communication quality and signal stability of the device. The SIM7028 module supports multi-band NB-IoT network connectivity, ensuring wide applicability worldwide. Designed for low-latency, low-throughput applications, the SIM7028 module has excellent power management capabilities, making it suitable for long-term operation devices. It is ideal for IoT applications such as smart metering, remote control, asset tracking, remote monitoring, telemedicine, and shared bikes.

Features

  • Global version/multi-band support
  • Strong signal access capability
  • AT command control
  • SIM card type: Nano
  • External antenna: SMA antenna
  • Serial communication: UART 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 (kbps): 127(DL)/159(UL)
  • Network protocols: TCP/UDP/HTTP/TLS*/DTLS*/DNS/NTP/PING/LWM2M/COAP*/MQTT/MQTTS/SSL
  • Certifications:
    • SRRC*/NAL*/CCC*
    • CE-RED*/GCF*
    • Deutsche Telekom*/Vodafone*/Telefonica*
    • RoHS*/REACH*
    • China Telecom*
    • China Mobile*
    • China Unicom*

Includes

  • 1 x Unit NB-IoT2
  • 1 x SMA antenna
  • 1 x Hex wrench
  • 1 x HY2.0-4P Grove cable (20cm)

Applications

  • Remote control
  • Asset tracking
  • Remote monitoring
  • Shared bikes

Specifications

Specification Parameter
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
Power consumption test Standby current: DC5V/3.1mA
Network current: DC5V/36mA
Product dimensions 71.5 x 24 x 8mm
Package dimensions 136 x 92 x 13mm
Product weight 12.4g
Gross weight 25.5g

Certifications

Radio and Communication Equipment Certifications

  • SRRC, NAL, CE-RED, GCF, CCC

Safety and Environmental Certifications

  • CCC, RoHS, REACH

Operator Certifications

  • Deutsche Telekom, Vodafone, Telefonica, China Telecom, China Mobile, China Unicom

Schematics

PinMap

Unit NBIoT2

HY2.0-4P Black Red Yellow White
PORT.C GND 5V UART_TX UART_RX

Model Size

module size

Datasheets

Softwares

Arduino

Programming Note
PIO users can refer to the following configuration to download the specified TinyGSM library version: v0.12.0-patch-1
Arduino: Download the above library file and manually install it to the specified Arduino library folder.
lib_deps = 
        https://github.com/m5stack/TinyGSM/archive/refs/tags/v0.12.0-patch-1.zip

Protocol

Video

Product Comparison

Product SKU Module Cat-NB Frequency Bands Data Transfer Rate Communication Protocols
Unit NB-IoT U111 SIM7020G B1/B2/B3/B4/B5/B8/B12/
B13/B17/B18/B19/B20/B25/B26
/B28/B66/B70/B71/B85
126 (DL) / 150 (UL) TCP/UDP/HTTP/HTTPS/TLS*/
DTLS*/DNS/NTP/PING/LWM2M/
COAP*/MQTT/MQTTS/SSL
Unit NB-IoT2 U111-B SIM7028 B1/B2/B3/B4/B5/B8/B12/
B13/B14/B17/B18/B19/B20/B25/
B26/B28/B66/B70/B85
127 (DL) / 159 (UL) TCP/UDP/HTTP/HTTPS/TLS*/
DTLS*/DNS/NTP/PING/LWM2M/
COAP*/MQTT/MQTTS/SSL
Comparison Summary
The main differences between SIM7028 and SIM7020G are in frequency band support and data transfer rates. SIM7028 supports more frequency bands and slightly higher data transfer rates, making it suitable for more markets and higher bandwidth applications. While SIM7020G supports fewer frequency bands, it still covers most markets and is suitable for general IoT applications. Both modules are similar in network protocols and functional features, with extensive international and operator certifications.