Testing a GSM module via Mecanique's Serial Communicator - "terminator" issue?

[flotulopex]

"AT+CMGS="+4179xxxxxxx",#10,"Hello Roger",#26

Actually, the working syntax in the Serial Communicator is: AT+CMGS="+4179xxxxxxx"#10"Hello Roger"#26

Thanks Richard for your help

BTW, one of the AT commands manual I could find in the WEB says:



Using the SIM800L GSM module, according to the "AT data sheet" () I should have used a CR after the phone number. But by chance, I discovered that only a LF would work. Is it a typo or something wrong with my module, I don't know; fact is CR = NO, LF = YES!!!!

[Ioannis]

I never faced such a problem with SIMcom modules.

CR is the necessary for line or command termination. LF does not that...

Are absolutely sure you send out LF instead of CR?

Ioannis

[flotulopex]

Ioannis,

This is really strange, yes. It took me hours to find out that there was something strange.

But actually, to make it work, I use:

working with PIC: SEROUT PORTB.4,2,["AT+CMGS=",34,"+4179xxxxxx",34,10,"Hello Roger",26,10,13]

working with serial com: AT+CMGS="+4179xxxxxxx"#10"Hello Roger"#26

If I replace the 10 or #10 by a 13 or #13, it will not work anymore.

Nope, no idea what's wrong but "yes", I'm sure I use LF instead of CR.

[flotulopex]

Sure is sure so I just checked again.

See whats happens with CR instead of LF:

[Ioannis]

Do you have other terminal program to test? My suspicions fall on MCSP serial communicator.

Ioannis

[flotulopex]

I'll give it a try with PUTTY and HYPERTERMINAL although I don't know how to send control characters with those programs too

But why would it be the problem of my serial program since I need to do the same when I use the PIC?

working with PIC: SEROUT PORTB.4,2,["AT+CMGS=",34,"+4179xxxxxx",34,10,"Hello Roger",26,10,13]

As you can see, here too I need to use a Line Feed instead of a Carriage Return !?

[Ioannis]

You are right.I missed that.

Well, I don't know what is wrong. I remember once, was testing on a SIM900 module with no problems on this. Sure a CR was needed to terminate the command.

For a couple of days I'll be out of town. On my return I will find it and give it a test again.

Ioannis