app: sms: Add timezone into concatenated msg and doc

Normal single SMS reception gives timezone information in the
format "UTC+02:00".
This was not present for concatenated SMS messages and the
format "UTC+02:00" is not mentioned in the documentation. Fixing these.

Jira: SM-278

Signed-off-by: Tommi Rantanen <tommi.rantanen@nordicsemi.no>

Author: trantanen

app/src/sm_at_sms.c

@@ -89,10 +89,13 @@ static void sms_callback(struct sms_data *const data, void *context)
 				goto done;
 			}
 			if (header->concatenated.seq_number == 1) {
-				sprintf(rsp_buf, "\r\n#XSMS: \"%02d-%02d-%02d %02d:%02d:%02d\",\"",
+				sprintf(rsp_buf,
+					"\r\n#XSMS: \"%02d-%02d-%02d %02d:%02d:%02d "
+					"UTC%+03d:%02d\",\"",
 					header->time.year, header->time.month, header->time.day,
-					header->time.hour, header->time.minute,
-					header->time.second);
+					header->time.hour, header->time.minute, header->time.second,
+					header->time.timezone * 15 / 60,
+					abs(header->time.timezone) * 15 % 60);
 				strcat(rsp_buf, header->originating_address.address_str);
 				strcat(rsp_buf, "\",\"");
 				strcat(rsp_buf, data->payload);

doc/app/at_sms.rst

@@ -49,7 +49,7 @@ This is the notification syntax when an SMS message is received:
 
   * The ``<datetime>`` parameter is a string.
     It represents the time when the SMS is received.
-    It has a format of ``YY-MM-DD HH:MM:SS``.
+    It has a format of ``YY-MM-DD HH:MM:SS UTC[+|-]HH:MM``.
   * The ``<number>`` parameter is a string.
     It represents the SMS sender's phone number.
   * The ``<text>`` parameter is a string.
@@ -69,13 +69,13 @@ Example
 
   OK
 
-  #XSMS: "21-05-24 11:58:22","090xxxxxxxx","Tested OK"
+  #XSMS: "21-05-24 11:58:22 UTC+09:30","090xxxxxxxx","Tested OK"
 
   at#xsms=2,"+8190xxxxxxxx","0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
   OK
 
-  #XSMS: "21-05-24 13:29:47","090xxxxxxxx","0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+  #XSMS: "21-05-24 13:29:47 UTC-09:00","090xxxxxxxx","0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
 Read command
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