1 NB模块初始化流程分析
1.1 NB模块初始化流程分析
流程如下:
1.2 常见AT指令
测试日志如下:
//上电后自动输出
[11-08 17:35:22:824]*MATREADY: 1
[11-08 17:35:22:824]+CFUN: 1
[11-08 17:35:23:554]+CPIN: READY
//at
[11-08 17:35:39:015]AT
[11-08 17:35:39:015]OK
[11-08 17:35:41:676]ATE1
[11-08 17:35:41:676]OK
//读取imei号
[11-08 17:35:44:993]AT+GSN
[11-08 17:35:45:015]868334033341946
[11-08 17:35:45:015]OK
//读取imsi号
[11-08 17:35:48:105]AT+CIMI
[11-08 17:35:48:117]460041677239460
[11-08 17:35:48:117]OK
//检查sim卡
[11-08 17:35:49:393]AT+CPIN?
[11-08 17:35:49:406]+CPIN: READY
[11-08 17:35:49:406]OK
//设置apn
[11-08 17:35:51:101]AT+CFUN=0
[11-08 17:35:51:771]+CPIN: NOT READY
[11-08 17:35:51:870]OK
[11-08 17:35:52:730]AT*MCGDEFCONT="IP",""
[11-08 17:35:52:730]OK
[11-08 17:35:54:440]AT+CFUN=1
[11-08 17: