AT+CUSD 命令问题

Question

我想通过AT命令查看sim卡余额。一切正常运行。但我无法进入响应菜单。当我试图输入它时，操作员给我 "invalid request" 错误。在移动设备中 phone 它工作正常。

Checking Selected Port COM11 
Data Received - AT+CNMI=1,1
AT
OK

OK

Data Received - AT+CUSD=1,*121#
OK

Data Received - 
+CUSD: 2,"My Airtel App:Track your daily data usage, balance, validity and 
Recharge online. Download now from Play Store/ App Store",15

Data Received - 
+CUSD: 1,"919771272794
1 Change Language
2 Balance
3 New Offers
4 My Offer
5 My Account Info
6 Coupon Recharge
7 Other Services
8 DTH
9 Payments Bank
",15

Data Received - > AT+CUSD=1,2

OK

Data Received - 
+CUSD: 1,"Invalid request.
1 Change Language
2 Balance
3 New Offers
4 My Offer
5 My Account Info
6 Coupon Recharge
7 Other Services
8 DTH
9 Payments Bank
",15

Answer 1

第一次使用 **

AT+CSCS="GSM"
AT+CUSD=1,"*121#",15

**

你会收到以下消息（和往常一样）

*CUSD: 1,"My Airtel App:Track your daily data usage, balance, validity and 
Recharge online. Download now from Play Store/ App Store",15

Data Received - 
+CUSD: 1,"919771272794
1 Change Language
2 Balance
3 New Offers
4 My Offer
5 My Account Info
6 Coupon Recharge
7 Other Services
8 DTH
9 Payments Bank
",15*

现在

AT+CUSD=1,"n",15

n 是您的选择号码。例如：要获得余额，您将输入

AT+CUSD=1,"2",15

我遇到了同样的问题。

AT+CUSD 命令问题

Issue with AT+CUSD command

at-command