AT+CNMI

Projects Programming
1

I want to read incoming SMS messages from a SIM800L module. Going to use this command AT+CNMI.

I don't want any SMS to be in the SIM card. Because Later they will give too much trouble for me telling buffer full & no space for incoming messages blah blahh...

I dont have time to read SMS store locations & delete them one by one.My mainloop is full of busy.

My doubt is if I use AT+CNMI command will the recieved SMS will store in SIM card in any manner? Or they will push to Arduino without storing in SIM card?

2

Prasanjith:
My doubt is if I use AT+CNMI command will the recieved SMS will store in SIM card in any manner?

No, the massage is read as 'flash SMS'

3

KASSIMSAMJI:
No, the massage is read as 'flash SMS'

Many thanks for the reply.So they will directly send to arduino nothing is inside the SIM.

What about if I send a SMS from arduino? Do I need to delete the sent SMS from message storage areas? I'm really dissapointed on this SMS storage handling.

I want to keep my SIM clean all the time.

4

Prasanjith:
Many thanks for the reply.So they will directly send to arduino nothing is inside the SIM.

What about if I send a SMS from arduino? Do I need to delete the sent SMS from message storage areas? I'm really dissapointed on this SMS storage handling.

I want to keep my SIM clean all the time.

In your code, don't you have an SMS message output buffer? Typically you would re-use it by overwriting it every time you use it.

5

Prasanjith:
What about if I send a SMS from arduino? Do I need to delete the sent SMS from message storage areas?

more likely..

but you can issue AT+CMGD=1,4 ( that deletes every trace of SMS ( sent, read, unread, etc) ) every once in a while to be on safe side

6

aarg:
In your code, don't you have an SMS message output buffer? Typically you would re-use it by overwriting it every time you use it.

You didn't get what I meant.I'm talking about SIM storage (where sent messages are stored in SIM).

7

KASSIMSAMJI:
more likely..

but you can issue AT+CMGD=1,4 ( that deletes every trace of SMS ( sent, read, unread, etc) ) every once in a while to be on safe side

You got it.I 'll try to do that.My main loop is really busy.