BPI NB-IoT Linaro 96Boars

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BPI NB-IoT Linaro 96Boars with Quecte BC95 module developent board

Introduction

BPI NB-IoT Linaro 96Boars with BC95 module developent board ,this is banana pi team first board for Linaro 96Board standard development board.

1.NB-IoT module:

  • NB-IoT module:Quectel BC95-B5/8/20 or BC95-G
  • Model and Frequency band:

Quectel 2.png

SIM card:

  • Micro SD SIM Slot
  • e-SIM optional(footprint reserved on the board)
  • Antenna: IPEX antenna connector

2,MCU:

Quectel 3.png

Hardware

Hardware inerface

BPI NB-IoT linaro interface.jpg

Harware spec

HardwareSpecification of BPi BC95-LINARO
Soc STM32F103RBT6
CPU ARM 32-bit Cortex™-M3 CPU @72MHz
SDRAM size 20 KB
Flash size 128KB
Power 5V/2A via MicroUSB / 2PIN Battery Connector
Low-level peripherals 40 Pins Header \(2.0mm Pitch\), 32×GPIOs,Some of which can be used for specific functions including UART, I2C, SPI, PWM
On board Network Quectel BC95
On board SIM MicroSD SIM SloteSIM\(option\)
USB 1 USB 2.0 host
Buttons Reset button, User button
Leds 1 Power status Led and 5 other Leds
Sizes 60mm×30mm
Weight 10g

Dimensions

Size.jpg

GPIO (CON1) define

40 PIN GPIO (CON1) define:

40 pin define.png

Swd pin define.png

Uart pin define.png

Software

Software introduction

1 ,Lite OS brief Huawei

LiteOS is a lightweight open-source IoT OS and a smart hardware development platform. It simplifies IoT device development and device connectivity, makes services smarter, delivers superb user experience, and provides better data protection. Huawei LiteOS is designed for smart homes, wearables, IoV, and intelligent manufacturing applications.

For more about HuaWei Lite OS please refer to:

http://developer.huawei.com/ict/en/site-iot/product/liteos

IDE:recommended development environment is MDK521 + STM32F1xxx library

2,BC95 software brief:

Command format:

Quectel 4.png

  • Searching network steps:
AT+NBAND?//QueryBand
AT+CFUN?//value :1
AT+CIMI//Query IMSI number
AT+CSQ/Query the signal strength
AT+NUESTATS//Query module status
AT+CGATT?//Back + CGATT: 1 indicates that the attachment is successful, with a delay of about 30s
AT+CEREG?//Search for network status, 1 for Internet, 2 for Network
AT+CSCON?//Query the connection status, 1 CONNECT, 0 IDLE
  • Manually configure network if fails to register network automatically:
    • AT+CFUN=1 AT+CIMI**//Execute CFUN = 1, wait for 4 seconds to query IMSI, if it can be found that the card has been identified;If not, please check the card is inserted and confirm whether it is a USIM card.
AT+NBAND?//Query frequency band information.
AT+CEREG=1//Set to automatically register network registration status, when the module registered on the network, will report URC.**AT+CGDCONT=1,“IP”,“APN”**//The APN is configured locally \(or not configured\) for local access.
AT+COPS=1,2,"46000"**//Specify PLMN search, PLMN configuration.
AT+CSQ//Query signal strength.
AT+NUESTATS// Query module status
AT+CGATT?//Back + CGATT: 1 indicates that the attachment is successful, with a delay of about 30s
AT+CEREG?//Search for network status, 1 for Internet, 2 for Network
AT+CSCON?//Query the connection status, 1 CONNECT, 0 IDLE

Network connectivity status chart:

1. Connect status \(+ CSCON: 0, 1, the module is in this state after network injection\), the duration of this state is configured by the base station, and from

From time to time to control the device, the range of 1-3600s, the default 20s.

1. Idle state \(+ CSCON: 0,0\), this state lasts the time to dispose by the key network, by Active timer \(T3324\) Come Control, the range of 0-11160s, the default 10s.

2. PSM state \(Judgment by power consumption, the maximum power consumption 5uA\), the duration of the state by the core network configuration, set by the TAU Timer \(T3412\) to control the range of 0h-310h, the default 24h.

![](/assets/quectel 5.png)

Resources

Quecte BC95 datasheet (CN version) https://drive.google.com/file/d/0B4PAo2nW2KfnWnRVczZXV3lPZmc/view?usp=sharing

STM32F103(LD) datasheet.

EN: https://drive.google.com/file/d/0B4PAo2nW2KfnUm1na2tSOXQzNzg/view?usp=sharing

CN: https://drive.google.com/file/d/0B4PAo2nW2KfneUdMMzktLVNZSlU/view?usp=sharing

Discuss on forum : http://forum.banana-pi.org/t/bpi-nb-iot-linaro-96boars-with-quecte-bc95-module-developent-board/3416/2