Hi everyone,
Is there any way in which I can interface a GSM modem with a 8051 and retrieve the decoded SMS. The motivation behind this is that... even if i can get the encoded SMS from the GSM modeme using AT commands, the decoding complexity is very high for a 8051. And I think the GSM module should have some kind of decoding code (using this would be benificial and reduce code complexity for 8051)
Also please let me know exactly how to interface the GSM modem to 8051. I dont want a PC interface in between.
Please help me out..
Sambit NIT ROURKELA
"can we directly retrieve the SMS in text format from the GSM module?"
Almost certainly yes - see the module's Manual for details.
"Is there any means by which i can access the previous discussion u hav mentioned?"
Yes - the 'Search' is now working again!
Dear sir, I am able to send all the commands through the controller and also able to receive the response from the GSM module. The problem is when i send SMS through the controller i am not able to receive the response. i sent AT+CMGF=1 from the controller and received OK response.
But when i send AT+CMGS="PHone number" and send the SMS text message and send CTRLZ i am receiving ERROR response.
Is there is any data to be sent after CTRLZ Regards sapthagiri
"when i send SMS through the controller I am not able to receive the response."
Does it work when you do it manually through Hypoterminal (or similar)?
After sending the AT+CMGS="PHone number", you need to wait for the '>' prompt before you send the text of the message.
"i am receiving ERROR response"
Use AT+CMEE=1 to enable extended error incidations, then look-up the error code...
Dear sir, After sending the Phone Number I am waiting for > Promt. I am getting this Promt also. But when i send the Text message and send CTRLZ i am receiving the ERROR response.
Allthe commands including the SMS working on hyperterminal.
Sir,I checked AT+CMEE=1 , i iam getting +CME=100 I saw the manual for this error and i found it was unkown.
Regards sapthagiri
If it works on Hypoterminal, but not from your code, you need to examine the differences!
One obvious difference will be timing - a microcontroller can send commands much faster than you can type them! As a first step, try adding some delays.
Also, be sure that your code is sending exactly the same as Hypoterminal - especially things like line-endings (CR or CRLF?)...
AS FAR AS I AM AWARE, REFERENCES TO <BOLD><ITALIC>HYPOTERMINAL</ITALIC></BOLD> SHOULD BE READ AS <BOLD><ITALIC>HYPERTERMINAL</ITALIC></BOLD>
You're doing it again!
You really do need to pay attention to the 'Preview' - your Bold & Italic formatting didn't work either, did they?!
Yes, "Hypoterminal" (sic) is a malapropism - a deliberate error for humourous effect: " Presumably, they called it "Hyper-terminal" to give the impression that it's "so much more" than a plain old terminal. en.wiktionary.org/.../Hyper-
But many would agree that "Hyperterminal" is a rather poor terminal - it has too many quirks, limitations, and annoyances. Hence I call it "Hypo-terminal" to indicate its deficiencies: en.wikipedia.org/.../Hypo
I don't know if you're the first to notice this, but you're certainly the first to comment!
Andy isn't the only one to write Hypoterminal on this forum. I think it's the most common name used.
I tend to use the correct M$ (see, I also like to change some names (: ) name, just to make sure that there is no single way of understanding what program to use.
"Andy isn't the only one to write Hypoterminal on this forum."
And there was me thinking I was being original! Foiled again! :-(
In fact, I did a quick search, and found that "Hypoterminal" is quite widely used on many other forums...
Dear Sir, I have given delay of 2 sec after every command sent to receive the response. I have changed the Baud rate to 9600 using AT+IPR=9600 command. Still i am getting the same Error. i saw the commands sent from the controller to GSM on the Hyperterminal and the commands what i send through the controller is exactly same as from the hyperterminal.
what is wrong with this code plese
unsigned char mmc_init(void) { unsigned int i; unsigned char response; MMC_CS_TRIS=0; MMC_VCC_KEY_TRIS=0; //out MMC_VCC_KEY=0; //MMC power ON MMC_DOUT_TRIS=1; //input MMC_DOUT_TRIS = 1; // dout as input. MMC_CS_TRIS = 0; // CS as output. MMC_CLK_TRIS = 0; // CLK as output. MMC_DI_TRIS = 0; // DI as output MMC_CLK = 1; mmc_powerup(); mmc_unselect(); for(i = 0; i < 10; ++i) mmc_read_write(0xFF); /* address card */ mmc_select(); /* reset card */ for(i = 0; ; ++i) { response = mmc_send_command_r1(CMD_GO_IDLE_STATE, 0); if(response == 1) break; if(i == 0x1ff) { mmc_unselect(); return 0; } } /* wait for card to get ready */ for(i = 0; ; ++i) { response = mmc_send_command_r1(CMD_SEND_OP_COND, 0); if(!(response & 1)) break; if(i == 0x7fff) { mmc_unselect(); return 0; } } /* set block size to 512 bytes */ if(mmc_send_command_r1(CMD_SET_BLOCKLEN, 512)) { mmc_unselect(); return 0; } /* deaddress card */ mmc_unselect(); raw_block_address = 0xffffffff; if(!mmc_read(0)) return 0; return 1; }
That it is a quite long line???
Are you _really_ sure you didn't notice this problem in the preview?
Appology please here is bad code
"I have given delay of 2 sec after every command sent to receive the response."
Do you have a delay after receiving the response before you send the next command.
How have you confirmed that what your software is sending is identical to what Hypoterminal sends?
Author: jamil rafar Posted: 12-Jun-2007 04:54 "what is wrong with this code plese"
Apart from the formatting, It appears to have nothing whatsoever with the topic of this thread!
Please start a new thread for a new topic!
Dear sir, Yes I am waiting for 2 sec before and after sending the command so that i can see the received Response in the debugger. i am sending the identical commands and waiting for response. I had simulated on the hyperterminal before sending it to GSM module.