<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">Hello All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a problem with getting the proper signal level from ModemManager. Here is the Linux console output from ModemManager –debug session:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979773.483400] [mm-broadband-modem.c:1991] modem_load_signal_quality(): loading signal quality...<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979773.483759] [mm-port-serial.c:1237] mm_port_serial_open(): (ttymxc2) device open count is 2 (open)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979773.484146] [mm-port-serial-at.c:440] debug_log(): (ttymxc2): --> 'AT+CIND?<CR>'<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979776.462143] [mm-port-serial.c:1237] mm_port_serial_open(): (ttymxc2) device open count is 3 (open)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979776.462543] [mm-port-serial.c:1296] mm_port_serial_close(): (ttymxc2) device open count is 2 (close)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979776.462821] [mm-port-serial-at.c:440] debug_log(): (ttymxc2): --> 'AT+CSQ<CR>'<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979779.462935] [mm-port-serial.c:1296] mm_port_serial_close(): (ttymxc2) device open count is 1 (close)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New"">ModemManager[1580]: <debug> [1490979779.463338] [mm-iface-modem.c:1221] signal_quality_check_ready(): Couldn't refresh signal quality: 'Serial command timed out'<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal">This happen when I have issued the following command to ModemManager:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7"><span lang="EN" style="font-size:10.0pt;font-family:"Courier New";color:#333333">mmcli -m 0 --simple-disconnect<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7"><span lang="EN" style="font-size:10.0pt;font-family:"Courier New";color:#333333"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7">The command: <o:p>
</o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7"><span lang="EN" style="font-size:10.0pt;font-family:"Courier New";color:#333333">mmcli -m 0 --simple-connect="pin=1234,apn=internet"<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7">does not bring the ModemManager back to receive proper signal quality.<o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7">What I need to do to get ModemManager properly detecting signal quality?<o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7"><o:p> </o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7">In order to get ModemManager updating signal quality I needed to power down and power up the development board.
<o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7"><o:p> </o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7">Best Regards,<o:p></o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7"><o:p> </o:p></p>
<p class="MsoNormal" style="line-height:12.0pt;background:#F7F7F7">Jan Graczyk<span lang="EN" style="font-size:10.0pt;font-family:"Courier New";color:#333333"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>