CMS Error 518 while sending messages using AT Commands

2
votes

I have connected a gsm modem to my computer. I am trying to read sms from gsm modem and send sms to other mobile numbers using AT commands. When I type

at+cmgl ="all"

It lists all the messages from SIM card. But the messages displyed in hyper terminal are like this..

+CMGL: 1,"REC READ","004C004D002D00560065006E005300650063",,"11/12/15,16:10:04+2 2" 0041007400200063006C006F00730065002C002000530065006E0073006500780020003100350038 003300360028002D003400350029002C0020004E0069006600740079002000340037003400360028 002D0031003700290020006C006500640020006200790020006D006500740061006C007300200028 0053007400650072006C006900740065002D00340025002900200026002000630061007000200067 006F006F0064007300200028004200480045004C002D003300250029002E0020004500750072006F 007000650061006E0020006D006B00740073002000740072006100640069006E0067002B00760065 002E00200044006F00770020006600750074002B0037002E002000560045004E0054005500520041

+CMGL: 2,"REC READ","00540041002D0049004E004E005300450054",,"12/03/24,20:32:04+2 2" 00480069002100200059006F00750072002000640065007600690063006500200073007500700070 006F0072007400730020004D004D0053002C005400410054004100200044006F0063006F006D006F 0020004400690076006500200049006E00200061006E006400200047005000520053002E00530061 0076006500200066007200650065002000730065007400740069006E0067007300200079006F0075 0020006100720065002000610062006F0075007400200074006F0020007200650063006500690076 006500200061006E006400200065006E006A006F00790020006F00750072002000560061006C0075 0065002000410064006400650064002000730065007200760069006300650073

While the messages in sim cad are in simple text format. How can I see the messages from sim card in text format in Hyper terminal?

Also when I try to send the message from hyper terminal using command

at+cmgs="phone number"

It gives me error saying

+CMS ERROR: 518

Can Anybody tell me what's the problem?

Note: I have set sms service centre no.

1
gsmmodemat-command
Have you set the operating mode to text? (by sending AT+CMGF=1) That might be why you are not seeing the real text for the CMGL command. – kmp

1 Answers

0
votes

Seems your message format is not set to Text format and is likely in PDU mode. You should give AT+CMGF=1 to set to text format.

Also you are getting +CMS ERROR: 518 means that your storage type is invalid. Set your storage appropriately