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

[Ioannis]

When you type AT 13 (without the comma), the terminal will send 4 sequence of the ASCII equivalent (in decimal): 65 84 49 51. This is not what you want, right?

You want the number 13 be sent, not the 49 ('1') and 51 ('3').

Hope this helps,
Ioannis

[richard]

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


or

"AT+CMGS="+4179xxxxxxx",$A,"Hello Roger",$1A

[Ioannis]

To add on Richard's post, if you insist on using the Serial Communicator, Help says this:

Parse Control Characters

When enabled, the parse control characters option enables you to send control characters in your message, using either a decimal or hexadecimal notation. For example, if you want to send hello world followed by a carriage return and line feed character, you would use hello world#13#10 for decimal, or hello world$D$A for hex. Only numbers in the range 0 to 255 will be converted. For example, sending the message letter #9712345 will be interpreted as letter a12345.

If the sequence of characters does not form a legal number, the sequence is interpreted as normal characters. For example, hello world#here I am. If you don't want characters to be interpreted as a control sequence, but rather send it as normal characters, then all you need to do is use the tilda symbol (~). For example, letter ~#9712345 would be sent as letter #9712345.


Ioannis

[flotulopex]

Thanks guys,

I knew it, I knew it!!!

I should have read the communicator's help again - did it a few years ago but forgot the "hash" story... my bad :-\

Thanks again...

[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]

When you type AT 13 (without the comma), the terminal will send 4 sequence of the ASCII equivalent (in decimal): 65 84 49 51. This is not what you want, right?

You want the number 13 be sent, not the 49 ('1') and 51 ('3')....

Thanks Ioannis for this good lesson. I effectively didn't realize that I was sending those "four individual" characters one-by-one.

Have a nice day

[Ioannis]

You are welcome!

Ioannis