I am interfacing the nrf2832 with the sim 808 module.
In order to be able to send a message I need to use Ctrl+z.
This should be entered as an escape sequence.
I have tried printf("\x1A"); but it doesn't work. How do I send Ctrl+z as an escape sequence?
I think that your problem is that you're passing a string rather than a character.
Try
printf('\x1A');When I put printf('\x1A') it gives me a warning telling 'format string is not a string literal'.
Yes you're right, my mistake.
I usually treat my data as binary and build them up in a buffer before sending.
As far as I can tell it should work.
Are you attempting to escape back to an AT-Command string?
Do you need to place <CR><LF> after the CTRL-Z?
Otherwise have you tried something like
printf("%c", 0x1A);Thank you for the response.
AT+CMGS=<number><CR><message><CTRL-Z> (This the format of the AT commands that has to be sent).
printf("\r\nAT+CMGF=1\n");
nrf_delay_ms(5000);
printf("AT+CMGS=\"+919xxxxx22\"\r");
nrf_delay_ms(2000);
printf("Hello,Elecrow!");
nrf_delay_ms(1000);
printf("%c", 0x1A); // i tried this but its not working , i have put ctrl+z here
nrf_delay_ms(1000);
printf("\r\nAT\r\n");
nrf_delay_ms(5000);
the rest of the AT commands are giving proper return values
Thank you for the response.
AT+CMGS=<number><CR><message><CTRL-Z> (This the format of the AT commands that has to be sent).
printf("\r\nAT+CMGF=1\n");
nrf_delay_ms(5000);
printf("AT+CMGS=\"+919xxxxx22\"\r");
nrf_delay_ms(2000);
printf("Hello,Elecrow!");
nrf_delay_ms(1000);
printf("%c", 0x1A); // i tried this but its not working , i have put ctrl+z here
nrf_delay_ms(1000);
printf("\r\nAT\r\n");
nrf_delay_ms(5000);
the rest of the AT commands are giving proper return values
I've just had a peek at the AT-Command manual for the SIM800 devices.
It looks to me that your number is incorrectly entered. I think that it should be:
printf("AT+CMGS=\"919xxxxx22\", 145\r");
+CMGS=<da>[, <toda>] <CR>text is entered <ctrl-Z/ESC
<da> GSM 03.40 TP-Destination-Address Address-Value field in string format(string should be included in quotation marks); BCD numbers (or GSM default alphabet characters) are converted to characters of the currently selected TE character set (specified by +CSCS in 3GPP TS 27.007); type of address given by <toda>
<toda> GSM 04.11 TP-Destination-Address Type-of-Address octet in integer format (when first character of <da> is + (IRA 43) default is 145, otherwise default is 129)
I checked on my debug window and i see that 0x1A is sent on the tx_buf but still i am not getting the message. Does ctrl+z have any other escape sequence?
Did you check & change the line with the number to which you're sending the message? I think that it's wrong.
yes i changed that too
How do you reading the responses sent back