BPI NB-IoT Linaro 96Boars

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：

SIM card：

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

2,MCU:

Hardware

Hardware inerface

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

GPIO (CON1) define

40 PIN GPIO (CON1) define:

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:


• 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.


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