将 AT 命令发送到调制解调器的 ADB shell 脚本 - 无法将控制权返回给 shell 并捕获输出 [英] ADB shell script to send AT commands to a modem-cannot return control to a shell and capture output
问题描述
我已经发布了类似的问题，但仍然无法完成我的工作，所以这是第二次尝试，其中我想更清楚地说明我的绊脚石.
I already posted similar question, but still could not get my job done, so this a a second attempt, where I would like to more clearly state my stumbling block.
所以基本上我在Android手机的adb shell中，通过发送AT命令与GPRS调制解调器通信.我可以通过将 at 命令重定向到代表调制解调器的设备文件来做到这一点；我可以回读使用在后台运行的 cat 实用程序的响应(较早开始).我在脚本中实现了它它可以发送单个 AT 命令并回读响应.例如，这里是脚本发送 + 警察?获取手机所在运营商的名称:
So basically I am in Android phone's adb shell, communicating with the GPRS modem by sending AT commands. I am able to do it by redirecting at command to the device file representing the modem; and I can read back the response using cat utility running on the background (started earlier). I implemented it in a script which can send a single AT command and read back the response. For example, here is the script to send at+cops? to get the name of the operator the mobile is camping on:
#SendATCommand script
cat /dev/pts/7 &
echo -e at+cops?\r > /dev/pts/7
输出如下:
# ./sendATCommand
./sendATCommand
#
+COPS: 0,0,"AT&T",6
OK
/dev/pts/7: invalid length
现在有两个我无法解决的问题:
Now here are two problems which I cannot resolve:
- 我仍然需要手动按 ENTER 按钮才能返回 adb shell 提示#".有没有办法返回以编程方式#"提示?再次，我在 adb shell 中.
- 无法捕获显示的响应，无论是在变量中，还是在文件中，(例如(#./sendATCommand > output.txt) Output.txt 文件都会为空.我尝试了各种重定向，但仍然没有得到它工作.
谁能帮我解决这两个问题(如果可能的话)?最终我希望这个小脚本成为从我的 Android 设备所在的 PC 上运行的超级"脚本(例如 Perl 或 Powershell)调用连接，但在这两个问题解决之前没有办法做到这一点.非常感谢提前！
Can anyone please help me resolve those two problems (if ever possible)? Ultimately I want this little script to be called from a "super" script (e.g. Perl or Powershell) running on PC to which my Android device is connected, but there is no way to do it until those two problems resolved. Thanks a lot in advance!
推荐答案
我在将输出重定向到文件时遇到了类似的问题.我通过在 echo 命令前面添加 CMD/c 解决了我的问题.IE.如果我理解正确，您需要告诉系统它需要等到命令完成执行，然后才将输出重定向到文件.我是在DOS下做的.
I had similar problems with redirecting output to file. I resolved my problem by adding CMD /c in front of the echo command. I.e. if I understand correctly you need to tell the system that it needs to wait until command finishes executing and only then redirect output to a file. I was doing it in DOS.
由于您在 ANDROID 上运行，请尝试在命令前添加 sh -c.希望能帮助到你.
Since you are running on ANDROID try adding sh -c in front of your command. Hope it helps.
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