NB-IoT学习笔记:一、建立NB模组连接

文章目录

  • 1. AT 同步:"AT"
  • 2.上报 UE 错误: "AT+CMEE=1"
  • 3.设置命令回显:"ATE1"
  • 4.显示产品标识信息:"ATI"
  • 5.设置支持的频段:"AT+NBAND?"
  • 6.配置用户设备(UE)行为:"AT+NCONFIG?"
  • 7.定义分组数据协议(PDP)上下文:"AT+CGDCONT=1,"IP","HUAWEI.COM""
  • 8.请求产品序列号:"AT+CGSN=1"
  • 9.请求国际移动用户识别码:"AT+CIMI"
  • 10.分组交换(PS)附着:"AT+CGATT=1"
  • 11.查询分组交换(PS)附着:"AT+CGATT?"
  • 12.获取信号强度指示:"AT+CSQ"
  • 13.查询 PLWN 选择:"AT+COPS?"
  • 14.查询演进性分组系统(EPS)网络注册状态:"AT+CEREG?"
  • 15.信号连接状态:"AT+CSCON=1"
  • 16.查询用户设备(UE)统计信息:"AT+NUESTATS"

1. AT 同步:“AT”

开启 AT 同步,每一秒发送一次 AT,如果接收到 OK,同步成功;如果发送10次 AT 后,没有返回 OK 则认为同步失败。

/* Start AT SYNC: Send AT every 1s, if receive OK, SYNC success, if no OK return after sending AT 10 times, SYNC fail */
[2020-06-14 14:15:24:074_S:] AT
[2020-06-14 14:15:24:125_R:] AT
[2020-06-14 14:15:24:125_R:] OK

2.上报 UE 错误: “AT+CMEE=1”

开启后,UE 相关错误会返回 +CME ERROR: < e r r > <err>最终结果码,而不是 ERROR。

/* Use AT+CMEE=1 to enable result code and use numeric values */
[2020-06-14 14:15:24:128_S:] AT+CMEE=1
[2020-06-14 14:15:24:209_R:] AT+CMEE=1
[2020-06-14 14:15:24:209_R:] OK

3.设置命令回显:“ATE1”

开启回显模式

/* Use ATE1 to enable echo mode */
[2020-06-14 14:15:24:219_S:] ATE1
[2020-06-14 14:15:24:280_R:] ATE1
[2020-06-14 14:15:24:280_R:] OK

4.显示产品标识信息:“ATI”

返回产品标识信息

/*	 Display Product Identification Information  */
[2020-06-14 14:15:24:284_S:] ATI
[2020-06-14 14:15:24:381_R:] ATI
[2020-06-14 14:15:24:381_R:] Quectel
[2020-06-14 14:15:24:381_R:] BC28
[2020-06-14 14:15:24:381_R:] Revision:BC28JAR01A04

[2020-06-14 14:15:24:422_R:] OK

5.设置支持的频段:“AT+NBAND?”

查询使用的频段(Frequency band:900MHz)

/* Query module support Bands */
[2020-06-14 14:15:24:428_S:] AT+NBAND?
[2020-06-14 14:15:24:536_R:] AT+NBAND?
[2020-06-14 14:15:24:536_R:] +NBAND:8

[2020-06-14 14:15:24:536_R:] OK

6.配置用户设备(UE)行为:“AT+NCONFIG?”

/* Query the user configuration */
[2020-06-14 14:15:24:541_S:] AT+NCONFIG?
[2020-06-14 14:15:24:927_R:] AT+NCONFIG?
[2020-06-14 14:15:24:927_R:] +NCONFIG:AUTOCONNECT,TRUE
[2020-06-14 14:15:24:962_R:] +NCONFIG:CR_0354_0338_SCRAMBLING,TRUE
[2020-06-14 14:15:24:993_R:] +NCONFIG:CR_0859_SI_AVOID,TRUE
[2020-06-14 14:15:25:027_R:] +NCONFIG:COMBINE_ATTACH,FALSE
[2020-06-14 14:15:25:060_R:] +NCONFIG:CELL_RESELECTION,TRUE
[2020-06-14 14:15:25:094_R:] +NCONFIG:ENABLE_BIP,FALSE
[2020-06-14 14:15:25:127_R:] +NCONFIG:MULTITONE,TRUE
[2020-06-14 14:15:25:160_R:] +NCONFIG:NAS_SIM_POWER_SAVING_AT+CFUN?
[2020-06-14 14:15:27:659_R:] AT+CFUN?
[2020-06-14 14:15:27:659_R:] +CFUN:1

[2020-06-14 14:15:27:659_R:] OK

7.定义分组数据协议(PDP)上下文:“AT+CGDCONT=1,“IP”,“HUAWEI.COM””

/* Use AT+CGDCONT to configuration PDP */
[2020-06-14 14:15:27:671_S:] AT+CGDCONT=1,"IP","HUAWEI.COM" 
[2020-06-14 14:15:27:829_R:] AT+CGDCONT=1,"IP","HUAWEI.COM" 
[2020-06-14 14:15:27:872_R:] +CME ERROR: 515

8.请求产品序列号:“AT+CGSN=1”

请求 IMEI 号

/* Use AT+CGSN=1 to query the IMEI of module */
[2020-06-14 14:15:30:254_S:] AT+CGSN=1
[2020-06-14 14:15:30:355_R:] AT+CGSN=1
[2020-06-14 14:15:30:355_R:] +CGSN:861410049564171

[2020-06-14 14:15:30:387_R:] OK

9.请求国际移动用户识别码:“AT+CIMI”

注意:开机几秒内可能无法显示 IMSI

/* Use AT+CIMI to query the IMSI */
[2020-06-14 14:15:30:891_S:] AT+CIMI
[2020-06-14 14:15:30:981_R:] AT+CIMI
[2020-06-14 14:15:30:981_R:] 460046671802920

[2020-06-14 14:15:30:981_R:] OK

10.分组交换(PS)附着:“AT+CGATT=1”

激活 PDP 上下文的配置文件

/* User "AT+CGATT=1"to activate context profile */
[2020-06-14 14:15:30:987_S:] AT+CGATT=1
[2020-06-14 14:15:31:072_R:] AT+CGATT=1
[2020-06-14 14:15:31:072_R:] OK

11.查询分组交换(PS)附着:“AT+CGATT?”

查询 PDP 上下文的激活状态

/* Query the status of the context profile,You may have to wait for several seconds */
[2020-06-14 14:15:31:076_S:] AT+CGATT?
[2020-06-14 14:15:31:184_R:] AT+CGATT?
[2020-06-14 14:15:31:184_R:] +CGATT:1

[2020-06-14 14:15:31:184_R:] OK

12.获取信号强度指示:“AT+CSQ”

/* Use AT+CSQ to query current signal quality */
[2020-06-14 14:15:31:198_S:] AT+CSQ
[2020-06-14 14:15:31:295_R:] AT+CSQ
[2020-06-14 14:15:31:295_R:] +CSQ:24,99

[2020-06-14 14:15:31:295_R:] OK

13.查询 PLWN 选择:“AT+COPS?”

参数:0表示自动;2表示数字格式;字符串类型

/* Use AT+COPS? to query current Network Operator */
[2020-06-14 14:15:31:299_S:] AT+COPS?
[2020-06-14 14:15:31:393_R:] AT+COPS?
[2020-06-14 14:15:31:393_R:] +COPS:0,2,"46000"

[2020-06-14 14:15:31:393_R:] OK

14.查询演进性分组系统(EPS)网络注册状态:“AT+CEREG?”

参数:1使能网络注册 URC;1已注册,本地网络

/*Use AT+CEREG? to query current EPS Network Registration Status*/
[2020-06-14 14:15:31:424_S:] AT+CEREG?
[2020-06-14 14:15:31:533_R:] AT+CEREG?
[2020-06-14 14:15:31:533_R:] +CEREG:1,1

[2020-06-14 14:15:31:533_R:] OK

15.信号连接状态:“AT+CSCON=1”

使能非请求结果码(URC)

/* Use AT+CSCON=1 to enable signal connection status change URC */
[2020-06-14 14:15:31:538_S:] AT+CSCON=1
[2020-06-14 14:15:31:624_R:] AT+CSCON=1
[2020-06-14 14:15:31:624_R:] OK

16.查询用户设备(UE)统计信息:“AT+NUESTATS”

/*  Fetches the most recent operational statistics */
[2020-06-14 14:15:31:627_S:] AT+NUESTATS
[2020-06-14 14:15:31:881_R:] AT+NUESTATS
[2020-06-14 14:15:31:881_R:] Signal power:-730
[2020-06-14 14:15:31:916_R:] Total power:-656
[2020-06-14 14:15:31:916_R:] TX power:-30
[2020-06-14 14:15:31:948_R:] TX time:331
[2020-06-14 14:15:31:948_R:] RX time:22222
[2020-06-14 14:15:31:948_R:] Cell ID:202546710
[2020-06-14 14:15:31:981_R:] ECL:0
[2020-06-14 14:15:31:981_R:] SNR:149
[2020-06-14 14:15:31:981_R:] EARFCN:3682
[2020-06-14 14:15:32:014_R:] PCI:173
[2020-06-14 14:15:32:014_R:] RSRQ:-108
[2020-06-14 14:15:32:061_R:] OPERATOR MODE:4

[2020-06-14 14:15:32:061_R:] OK

[2020-06-14 14:21:25:241_R:] +CSCON:1

[2020-06-14 14:21:46:298_R:] +CSCON:0

[2020-06-14 14:26:24:752_R:] +CSCON:1

[2020-06-14 14:26:45:818_R:] +CSCON:0

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