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NB-IOT module
PN: NB-IOT   module Type: Transmission channel
Core chip reference: Brand \ L991TDMS~J}S5Y4_STHTJPT 
P/N \
Support   agreement: 3GPP Re1.14 NB-IoTWireless communication interface and protocol
Support RF: Working frequency : Band01,Band02,Band03,Band05,Band08,Band12,Band13,Band14,Band17,Band18,Band19,Band20,Band25,Band26,Band28*,Band66
Radio frequency modulation pi/4 QPSK,pi/2 BPSK
Module support interface: UART、SIM/USIM
Modules can extend the interface: ADC、DAC etc
Drive: No Drive Opening API
Microprocessor development Reset, status indicator, antenna interface, etc
Safe: 1. Embedded network protocol stacks like LwM2M, CoAP, DTLS/DTLS+, UDP, TCP, DNS, ipv4/ipv6, ICMP, multi-tone and multi-band
2. Terminal access identity security authentication mechanism
3. Develop terminal operation and maintenance strategies
4. Verify the integrity of terminal firmware
Function: 1. Assist the equipment to establish the transmission channel between terminal and wan
2. Multi-frequency coverage
3. Small volume, low power consumption, long transmission distance and strong anti-interference ability
4. With network status indication and other extended interfaces
Module application: Intelligent home, vehicle and personal tracking, security systems, wireless POS, industrial pdas, intelligent measurement, remote maintenance and control, intelligent security, intelligent logistics, smart city, intelligent monitoring, etc
Product form: Independent product form Shape of core chip IDH module, SMT mounting mode, connecting with main board through welding pad.
Insert terminal equipment Shared bikes, smoke sensors, smart locks, POS machines, water meters, smart crutches, etc.
Common application cases 1. Shared bike management application in mobai and other cities
2. Intelligent smoke alarm
3. Intelligent cold chain tracking system based on nb-iot
4. Intelligent water meter reading system
Product problems: Program planning and product design Scheme planning: it can be replaced by the chip scheme of Sunshine Goods electronic partner;
Product design: shijia electronics provides IDH module ODM support with high cost performance and stable product
The closed loop application China 2G network withdrawal rhythm is approaching, at present China mobile has stopped 2G product warehousing.Relevant data show that the size of nb-iot in China is about 600 million in 2020, and it is foreseeable that all three operators will make the development of nb-iot on a scale as their top priority in 2018.
Based on this module, there are many closed-loop applications, which can be developed according to the function and structure of root body terminal.
Our company can help to plan the overall framework scheme according to the specific scenes of customers, assist to deal with multiple problems in the process of product realization, act as customer technical support, and provide the fastest and most valuable software and hardware 
Product manufacturing Module radio frequency performance consistency, product stability, finished EMI and EMC special treatment.