I have a EM7455B Module installed into a Panasonic CF-33. If I connect to the Modem via putty on COM Port 8 and press AT the answer is OK.
Then I type in AT+CMGF=1 to set SMS to Textmode.
Then I type in AT+CMGL=“ALL”.
I got then a list of all received SMS with this computer.
I send then a SMS to the Computer and repeat the AT+CMGL=“ALL” command.
The new SMS is the latest in the list but signed with REC READ. But Why? It should be normally signed with “REC UNREAD”. I am using a software looking for unread SMS Messages and in this case the software will never found a SMS.
In the moment I have no idea what cause this problem. Hopefulle someone here knows the solution.
I am using Windows 10.