Read SMS SENT timestamp, not RECEIVED

Hi

I am using the SIM800 series for some SMS applications. I need to check if an incoming SMS is new or old.

When I read the timestamp given by the AT+CMGL or AT+CMGR, the timestamp is the time when the SIM800 received the SMS, not when the sender has sent it.

Example: User sends an SMS, but the SIM800 is OFF Next day, I turn on the SIM800. SIM800 received the SMS, but the timestamp is new, and does not tell me that the SMS was sent yesterday.

Is there a way to read when the SMS was sent?

Thanks Kaare

Is there a way to read when the SMS was sent?

No. The message does not contain a timestamp.

PaulS: No. The message does not contain a timestamp.

Yes, it does. But the timestamp is the receiving timestamp, and not the timestamp when it was sent / received by network.

br Kaare

KaareB: Yes, it does. But the timestamp is the receiving timestamp, and not the timestamp when it was sent / received by network.

br Kaare

The receiving end ADDS a timestamp. The message does NOT contain a time stamp.