{"id":836,"date":"2020-03-07T13:33:58","date_gmt":"2020-03-07T13:33:58","guid":{"rendered":"https:\/\/mobiletidings.com\/?p=836"},"modified":"2020-05-04T16:45:58","modified_gmt":"2020-05-04T15:45:58","slug":"sending-out-an-sms-in-pdu-mode","status":"publish","type":"post","link":"https:\/\/techsofar.com\/sending-out-an-sms-in-pdu-mode\/","title":{"rendered":"Sending Out An SMS In PDU Mode"},"content":{"rendered":"<p>PDU mode is a lot more interesting than text mode. There are all kinds of things that can be done with SMS messages, all leveraging special formatting that is only available if you use PDU mode:<\/p>\n<ul>\n<li>Send\u00a0<a href=\"https:\/\/techsofar.com\/sending-a-flash-sms-message\/\" data-abc=\"true\">flash SMS<\/a>\u00a0messages<\/li>\n<li>Send a\u00a0<a href=\"https:\/\/techsofar.com\/sending-ota-bookmark-over-sms\/\" data-abc=\"true\">bookmark<\/a><\/li>\n<li>Configure the phone<\/li>\n<li>Send\u00a0<a href=\"https:\/\/techsofar.com\/text-formatting-with-ems\/\" data-abc=\"true\">EMS messages<\/a><\/li>\n<li>Send a\u00a0<a href=\"https:\/\/mobiletidings.com\/wap-push-over-sms\/\" data-abc=\"true\" target=\"_blank\" rel=\"noopener\">WAP push<\/a><\/li>\n<li>Send ringtones and wallpapers<\/li>\n<li>Set or remove the\u00a0<a href=\"https:\/\/techsofar.com\/voicemail-waiting-indication-sms\/\" data-abc=\"true\">voicemail waiting indicator<\/a><\/li>\n<\/ul>\n<p>The formatting of these PDU\u2019s is a little more complicated and requires some bit manipulations that are hard to do by hand.<\/p>\n<p>The GSM modem is put into PDU mode with the command \u2018AT+CMGF=0\u2019. Once in PDU mode, a PDU can be sent using the \u2018AT+CMGS\u2019 command:<br \/>\n<span id=\"more-55\"><\/span><\/p>\n<div>\n<pre class=\"csharpcode\">AT+CMGS=&lt;length&gt;&lt;CR&gt;\r\n&gt; &lt;here goes your PDU&gt;&lt;Crtl-Z&gt;<\/pre>\n<\/div>\n<div>The actual PDU consists of a number of octets (bytes). In the command, the &lt;length&gt; field represents the number of octets and the PDU is given in the hexadecimal representation of those octets. The \u2018&gt; \u2018 on the second line is a prompt that is written by the GSM modem to indicate that it is ready to accept your PDU.<\/div>\n<div><\/div>\n<div>Of course the interesting part is what the PDU looks like\u2026. more on this in the post \u201c<a href=\"https:\/\/techsofar.com\/more-on-the-sms-pdu\/\" data-abc=\"true\">More on the SMS PDU<\/a>\u201c.<\/div>\n","protected":false},"excerpt":{"rendered":"PDU mode is a lot more interesting than text mode. There are all kinds of things that can&hellip;\n","protected":false},"author":2,"featured_media":837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/techsofar.com\/wp-content\/uploads\/2020\/03\/pdu-mode.jpg","_links":{"self":[{"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/posts\/836"}],"collection":[{"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/comments?post=836"}],"version-history":[{"count":0,"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/posts\/836\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/media\/837"}],"wp:attachment":[{"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/media?parent=836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/categories?post=836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techsofar.com\/wp-json\/wp\/v2\/tags?post=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}