AT命令

AT：attention的简写

modem：调制解调器，移动模块

RIL：Radio Interface Layer，无线接口层

RILC:HAL层中代码，是用C和C++语言来实现的，简称RILC

RILJ:Framework层的代码，是用java语言实现的，简称RILJ

RILD:守护进程

https://blog.youkuaiyun.com/hanxiaoming292/article/details/62224733

 

 

AT命令举例：

读：

cat /dev/smd11

写：

echo -e "AT+QCSN?\r\n" > /dev/smd11

echo -e "AT+QCSN="\"9876543210\""\r\n" > /dev/smd11

echo -e "AT+QCSN="\"\""\r\n" > /dev/smd11

https://www.cnblogs.com/Cqlismy/p/12168110.html

 

AT命令常见应用：

检查SIM卡功能是否可用

查询IMSI号

检查网络信号强度

https://www.pianshen.com/article/6634354856/

https://www.cnblogs.com/Cqlismy/p/12168110.html

 

Android发送AT命令：

用数据线连上手机，打开超级终端输入 at+clac获取本机支持的AT命令，如果这命令也不支持，只能一个一个试了-_-

https://blog.youkuaiyun.com/ssydiai/article/details/16341165

https://download.youkuaiyun.com/detail/ssydiai/6557831

 

调试log：

调试的时候可以用logcat -b radio命令查看信息。

RIL: /hardware/ril/reference-ril/refereince-ril.c

AT: /hardware/ril/reference-ril/atchannel.c

RILD: /hardware/ril/rild/rild.c

RILC: /hardware/ril/libril/ril.cpp

RILB frameworks/base/telephony/java/com/android/internal/telephony/BaseCommands.java

RILJ: /frameworks/base/telephony/java/com/android/internal/telephony/gsm/RIL.java

GSM: /frameworks/base/telephony/java/com/android/internal/telephony/gsm/GSMPhone.java

 

android AT命令增加流程：

（android版本有点老啦）

https://blog.youkuaiyun.com/lei1217/article/details/50117979?utm_medium=distribute.pc_relevant.none-task-blog-title-4&spm=1001.2101.3001.4242

https://blog.youkuaiyun.com/guoleimail/article/details/41649537