broadband-modem,ussd: explain encoding/decoding logic

2018-08-21 16:50:15 +00:00
parent 6838a3f715
commit 3bc9a2dbe2
2 changed files with 16 additions and 4 deletions
@@ -2298,7 +2298,12 @@ huawei_modem_create_bearer (MMIfaceModem *self,
 }

 /*****************************************************************************/
-/* USSD encode/decode (3GPP-USSD interface) */
+/* USSD encode/decode (3GPP-USSD interface)
+ *
+ * Huawei devices don't use the current charset (as per AT+CSCS) in the CUSD
+ * command, they instead expect data encoded in GSM-7 already, given as a
+ * hex string.
+ */

 static gchar *
 encode (MMIfaceModem3gppUssd *self,