<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></style> </head> <body lang="CS" link="#0563C1" vlink="#954F72"> <div class="WordSection1"> Hello everyone,<o:p></o:p> <o:p> </o:p> I've tried to establish a connection using ModemManager through LTE network and haven't succeed in it. However, I am able to successfully set up an internet connection manually, given the same conditions but without ModemManager, applying the steps suggested in Sec. 5.10.2 of [1]:<o:p></o:p> <o:p> </o:p> AT+CFUN=4<o:p></o:p> AT+UCGDFLT=1,"IP","internet.t-mobile.cz" -- sets the default PDP context which is applied right after a registration.<o:p></o:p> AT+CFUN=1<o:p></o:p> <o:p> </o:p> When I use ModemManager (mmcli -m0 --simple-connect="apn=internet.t-mobile.cz"), it apparently configures a PDP context in the same way as for 3G/2G networks. The modem gets an IP and DNS addresses, but pings are not passing through it.. Please, see the logs and the modem info below.<o:p></o:p> <o:p> </o:p> root@zynq7:~# mmcli -m 0<o:p></o:p> <o:p> </o:p> /org/freedesktop/ModemManager1/Modem/0 (device id '9be611a4f382a582972f20fa86efbaa8f6b02918')<o:p></o:p> -------------------------<o:p></o:p> Hardware | manufacturer: 'u-blox'<o:p></o:p> | model: 'TOBY-L210'<o:p></o:p> | revision: '15.63'<o:p></o:p> | H/W revision: 'unknown'<o:p></o:p> | supported: 'gsm-umts, lte'<o:p></o:p> | current: 'gsm-umts, lte'<o:p></o:p> | equipment id: '###############'<o:p></o:p> -------------------------<o:p></o:p> System | device: '/sys/devices/soc0/amba/e0002000.usb/ci_hdrc.0/usb1/1-1/1-1.2'<o:p></o:p> | drivers: 'cdc_ether, cdc_acm'<o:p></o:p> | plugin: 'u-blox'<o:p></o:p> | primary port: 'ttyACM0'<o:p></o:p> | ports: 'ttyACM0 (at), ttyACM1 (at), ttyACM2 (at), wwan0 (net)'<o:p></o:p> -------------------------<o:p></o:p> Numbers | own : 'unknown'<o:p></o:p> -------------------------<o:p></o:p> Status | lock: 'none'<o:p></o:p> | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2 (10)'<o:p></o:p> | state: 'searching'<o:p></o:p> | power state: 'on'<o:p></o:p> | access tech: 'unknown'<o:p></o:p> | signal quality: '40' (recent)<o:p></o:p> -------------------------<o:p></o:p> Modes | supported: 'allowed: 2g; preferred: none<o:p></o:p> | allowed: 2g, 3g; preferred: none<o:p></o:p> | allowed: 2g, 3g; preferred: 2g<o:p></o:p> | allowed: 2g, 3g; preferred: 3g<o:p></o:p> | allowed: 3g; preferred: none<o:p></o:p> | allowed: 4g; preferred: none<o:p></o:p> | allowed: 2g, 3g, 4g; preferred: none<o:p></o:p> | allowed: 2g, 3g, 4g; preferred: 2g<o:p></o:p> | allowed: 2g, 3g, 4g; preferred: 3g<o:p></o:p> | allowed: 2g, 3g, 4g; preferred: 4g<o:p></o:p> | allowed: 2g, 4g; preferred: none<o:p></o:p> | allowed: 2g, 4g; preferred: 2g<o:p></o:p> | allowed: 2g, 4g; preferred: 4g<o:p></o:p> | allowed: 3g, 4g; preferred: none<o:p></o:p> | allowed: 3g, 4g; preferred: 3g<o:p></o:p> | allowed: 3g, 4g; preferred: 4g'<o:p></o:p> | current: 'allowed: 4g; preferred: none'<o:p></o:p> -------------------------<o:p></o:p> Bands | supported: 'egsm, dcs, pcs, g850, utran-1, utran-3, utran-4, utran-6, utran-5, utran-8, utran-2, utran-7, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7, eutran-8, eutran-11, eutran-13, eutran-17, eutran-20, utran-11'<o:p></o:p> | current: 'egsm, pcs, g850, utran-1, utran-5, utran-8, utran-2, eutran-1, eutran-2, eutran-5, eutran-8'<o:p></o:p> -------------------------<o:p></o:p> IP | supported: 'ipv4, ipv6, ipv4v6'<o:p></o:p> -------------------------<o:p></o:p> 3GPP | imei: '###############'<o:p></o:p> | enabled locks: 'none'<o:p></o:p> | operator id: 'unknown'<o:p></o:p> | operator name: 'unknown'<o:p></o:p> | subscription: 'unknown'<o:p></o:p> | registration: 'idle'<o:p></o:p> | EPS UE mode: 'csps-2'<o:p></o:p> -------------------------<o:p></o:p> SIM | path: '/org/freedesktop/ModemManager1/SIM/0'<o:p></o:p> <o:p> </o:p> -------------------------<o:p></o:p> Bearers | paths: 'none'<o:p></o:p> <o:p> </o:p> root@zynq7:~# mmcli -b 0<o:p></o:p> Bearer '/org/freedesktop/ModemManager1/Bearer/0'<o:p></o:p> -------------------------<o:p></o:p> Status | connected: 'yes'<o:p></o:p> | suspended: 'no'<o:p></o:p> | interface: 'wwan0'<o:p></o:p> | IP timeout: '20'<o:p></o:p> -------------------------<o:p></o:p> Properties | apn: 'internet.t-mobile.cz'<o:p></o:p> | roaming: 'allowed'<o:p></o:p> | IP type: 'none'<o:p></o:p> | user: 'none'<o:p></o:p> | password: 'none'<o:p></o:p> | number: 'none'<o:p></o:p> | Rm protocol: 'unknown'<o:p></o:p> -------------------------<o:p></o:p> IPv4 configuration | method: 'dhcp'<o:p></o:p> | address: '100.90.53.103'<o:p></o:p> | prefix: '32'<o:p></o:p> | gateway: '100.90.53.103'<o:p></o:p> | DNS: '93.153.117.49', '93.153.117.17'<o:p></o:p> -------------------------<o:p></o:p> IPv6 configuration | method: 'unknown'<o:p></o:p> -------------------------<o:p></o:p> Stats | Duration: '3330'<o:p></o:p> | Bytes received: 'N/A'<o:p></o:p> | Bytes transmitted: 'N/A'<o:p></o:p> <o:p> </o:p> Log:<o:p></o:p> <o:p> </o:p> [1541095858.128950] Simple connect started...<o:p></o:p> [1541095858.129087] PIN: unspecified<o:p></o:p> [1541095858.129146] Operator ID: unspecified<o:p></o:p> [1541095858.129204] Allowed roaming: yes<o:p></o:p> [1541095858.129259] APN: internet.t-mobile.cz<o:p></o:p> [1541095858.129315] IP family: unspecified<o:p></o:p> [1541095858.129368] Allowed authentication: unspecified<o:p></o:p> [1541095858.129420] User: unspecified<o:p></o:p> [1541095858.129471] Password: unspecified<o:p></o:p> [1541095858.129524] Number: unspecified<o:p></o:p> [1541095858.129566] Simple connect state (4/8): Wait to get fully enabled<o:p></o:p> [1541095858.129851] Simple connect state (5/8): Register<o:p></o:p> [1541095858.130018] Already registered in network '26201', automatic registration not launched...<o:p></o:p> [1541095858.130160] Simple connect state (6/8): Bearer<o:p></o:p> [1541095858.130242] Creating new bearer...<o:p></o:p> [1541095858.130344] u-blox: checking current USB profile...<o:p></o:p> [1541095858.130433] (ttyACM0) device open count is 2 (open)<o:p></o:p> [1541095858.130621] (ttyACM0): --> 'AT+UUSBCONF?<CR>'<o:p></o:p> [1541095858.140006] (ttyACM0): <-- '<CR><LF>+UUSBCONF: 2,"ECM",,"0x1143"<CR><LF>'<o:p></o:p> [1541095858.140526] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.140912] u-blox: usb profile loaded: ecm<o:p></o:p> [1541095858.140981] u-blox: checking current networking mode...<o:p></o:p> [1541095858.141072] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.141186] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.141312] (ttyACM0): --> 'AT+UBMCONF?<CR>'<o:p></o:p> [1541095858.153827] (ttyACM0): <-- '<CR><LF>+UBMCONF: 1<CR><LF>'<o:p></o:p> [1541095858.155688] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.156051] u-blox: networking mode loaded: router<o:p></o:p> [1541095858.156120] u-blox: creating u-blox broadband bearer (ecm profile, router mode)...<o:p></o:p> [1541095858.158948] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.159090] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.159433] u-blox: new u-blox broadband bearer created at DBus path '/org/freedesktop/ModemManager1/Bearer/0'<o:p></o:p> [1541095858.161586] Simple connect state (7/8): Connect<o:p></o:p> [1541095858.161719] Connecting bearer '/org/freedesktop/ModemManager1/Bearer/0'<o:p></o:p> [1541095858.161841] Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting)<o:p></o:p> [1541095858.165640] Launching 3GPP connection attempt with APN 'internet.t-mobile.cz'<o:p></o:p> [1541095858.165760] No specific IP family requested, defaulting to ipv4<o:p></o:p> [1541095858.165833] No specific IP family requested, defaulting to ipv4<o:p></o:p> [1541095858.165893] Looking for best CID...<o:p></o:p> [1541095858.166041] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.166219] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.166340] (ttyACM0): --> 'AT+CGDCONT?<CR>'<o:p></o:p> [1541095858.181561] (ttyACM0): <-- '<CR><LF>+CGDCONT: 4,"IP","IMS.MNC001.MCC230.GPRS","100.71.189.48",0,0,0,0,0,0<CR><LF>'<o:p></o:p> [1541095858.182167] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.182568] Found '1' PDP contexts<o:p></o:p> [1541095858.182636] PDP context [cid=4] [type='ipv4'] [apn='IMS.MNC001.MCC230.GPRS']<o:p></o:p> [1541095858.183035] Using empty CID 5 with PDP type 'ipv4'<o:p></o:p> [1541095858.183166] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.183284] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.183412] (ttyACM0): --> 'AT+CGDCONT=5,"IP","internet.t-mobile.cz"<CR>'<o:p></o:p> [1541095858.208571] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.208902] checking supported authentication methods...<o:p></o:p> [1541095858.209015] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.209150] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.209283] (ttyACM0): --> 'AT+UAUTHREQ=?<CR>'<o:p></o:p> [1541095858.214173] (ttyACM0): <-- '<CR><LF>+UAUTHREQ: (1-8),(0-2),,<CR><LF>'<o:p></o:p> [1541095858.214660] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.214933] Not using authentication<o:p></o:p> [1541095858.215014] setting up authentication preferences in PDP context #5...<o:p></o:p> [1541095858.215111] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.215229] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.215362] (ttyACM0): --> 'AT+UAUTHREQ=5,0,"",""<CR>'<o:p></o:p> [1541095858.228421] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.228664] activating PDP context #5...<o:p></o:p> [1541095858.228771] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.228887] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.229018] (ttyACM0): --> 'AT+CGACT=1,5<CR>'<o:p></o:p> [1541095858.679091] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.679468] gathering gateway information for PDP context #5...<o:p></o:p> [1541095858.679573] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.679703] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.679826] (ttyACM0): --> 'AT+UIPADDR=5<CR>'<o:p></o:p> [1541095858.895104] (ttyACM0): <-- '<CR><LF>+UIPADDR: 5,"ccinet4","100.90.53.103","255.255.255.0","",""<CR><LF>'<o:p></o:p> [1541095858.896432] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.896811] IPv4 gateway address retrieved: 100.90.53.103<o:p></o:p> [1541095858.896890] gathering IP and DNS information for PDP context #5...<o:p></o:p> [1541095858.896983] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.897093] (ttyACM0) device open count is 2 (close)<o:p></o:p> [1541095858.897218] (ttyACM0): --> 'AT+CGCONTRDP=5<CR>'<o:p></o:p> [1541095858.902575] (ttyACM0): <-- '<CR><LF>+CGCONTRDP: 5,6,"internet.t-mobile.cz.MNC001.MCC230.GPRS","'<o:p></o:p> [1541095858.903034] (ttyACM0): <-- '100.90.53.103.255.255.255.255","100.90.53.103","93.153.117.49","93.153.117.17","0.0.0.0","0.0.0.<o:p></o:p> [1541095858.903398] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'<o:p></o:p> [1541095858.903792] IPv4 address retrieved: 100.90.53.103<o:p></o:p> [1541095858.903863] IPv4 subnet retrieved: 255.255.255.255<o:p></o:p> [1541095858.903936] Primary DNS retrieved: 93.153.117.49<o:p></o:p> [1541095858.903978] Secondary DNS retrieved: 93.153.117.17<o:p></o:p> [1541095858.904039] finished IP settings retrieval for PDP context #5...<o:p></o:p> [1541095858.904144] (wwan0): port now connected<o:p></o:p> [1541095858.904200] Connected bearer '/org/freedesktop/ModemManager1/Bearer/0'<o:p></o:p> [1541095858.904851] (ttyACM0) device open count is 3 (open)<o:p></o:p> [1541095858.905034] Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> connected)<o:p></o:p> [1541095858.908564] Simple connect state (8/8): All done<o:p></o:p> [1541095858.910318] (ttyACM0) device open count is 2 (close)<o:p></o:p> <o:p> </o:p> The question is: is there a workaround for that? If no, should then the ublox plugin<o:p></o:p> be modified somehow? Or, maybe I've missed something in the modem's configuration..<o:p></o:p> <o:p> </o:p> Thank you in advance for any support.<o:p></o:p> <o:p> </o:p> Best regards,<o:p></o:p> Maxim Baryshnikov<o:p></o:p> <o:p> </o:p> --<o:p></o:p> [1] - <a href="https://www.u-blox.com/sites/default/files/AT-CommandsExamples_AppNote_%28UBX-13001820%29.pdf"> https://www.u-blox.com/sites/default/files/AT-CommandsExamples_AppNote_%28UBX-13001820%29.pdf</a><o:p></o:p> <o:p> </o:p> </div> </body> </html>