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CONTENTS

Unit NB-IoT2(SIM7028)

SKU:U111-B

Description

Unit NB-IoT2 is a wireless communication module suitable for global Cat-NB frequency bands. It features an integrated SIM7028 communication module, utilizing serial communication (controlled via AT commands) and incorporating an SMA external antenna interface to significantly enhance device communication quality and signal stability. The SIM7028 module supports multi-band NB-IoT network connections, ensuring broad applicability worldwide. Designed specifically for low-latency and low-throughput applications, the SIM7028 module boasts excellent power management capabilities, making it ideal for long-term operation. It is well-suited for IoT applications such as smart metering, remote control, asset tracking, remote monitoring, telemedicine, and bike-sharing.

Features

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

Includes

  • 1x Unit NB-IoT2
  • 1x SMA Antenna
  • 1x HEX KEY
  • 1x Grove Cable

Applications

  • Remote control
  • Asset tracking
  • Remote monitoring
  • Bike sharing

Certification

Wireless and Communication Equipment Certifications

  • SRRC, NAL, CE-RED, GCF, CCC

Safety and Environmental Certifications

  • CCC, RoHS, REACH

Carrier Certifications

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

Specification

Resources Parameters
Communication Module: SIM7028
Supports 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
Certifications Deutsche supporting/Vodafone/Telefonica/China telecom, China mobile/unicom
Communication Method UART 115200bps
Power Dissipation Standby current: DC5V/3.1mA
Standing current: DC5V/36mA
Product Size 71.5*24*8mm
Package Size 136*92*13mm
Product Weight 12.4g
Package Weight 25.5g

Schematic

schematics

PinMap

Core TXD RXD VCC GND
Core(Basic) G17 G16 5V GND
Core2 G14 G13 5V GND
CoreS3 G17 G18 5V GND
CoreMP135 PF11 PH8 5V GND

Module Size

module size

Examples

Arduino

Programming attention
PIO user: Download the specified library dependency version: v0.12.0-patch-1
Arduino: Download the above library file and manually install it in the specified Arduino library folder.

Version Comparison

Product SKU Module Cat-NB 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
Differences
The main differences between SIM7028 and SIM7020G are frequency band support and data transfer rates. The SIM7028 supports more frequency bands and slightly higher data rates, making it suitable for more markets and applications with higher bandwidth requirements. Although SIM7020G has slightly less frequency band support, it also covers most of the market and is suitable for general iot applications. The two are similar in network protocols and functional features, as well as extensive international and carrier certifications.

Video