PLS62 CREG for LTE | Thales IoT Developer Community
February 9, 2021 - 10:04am, 1071 views
Due to our application we have turned off auto-attach. We have only seen this issue with a sim-card from a certain provider.
Do we expect CREG to get registered for LTE networks (since LTE is evolved packet system)?
We are not getting CREG registration initially, As soon as we send AT+CGATT=1, we get registered with CEREG and CREG. How do we decide on, when to send AT+CGATT=1? if we cant rely on CREG getting registered first.
.
Hello,
PS attach is necessary for LTE. So if auto attach is disabled the manual attach is required. And the relevant indicator would be CEREG URC.
Regards,
Bartłomiej
Hi,
below I have simulated the above scenario, by forcing the modem to connect to a LTE network.
As it can be seen after the AT^SXRAT=3, we will become unregistered of whatever it was registered before, and it will start searching for LTE networks. Auto-attach is off due to the application.
AT+CEREG will become registered after the AT+CGATT=1 command was sent, therefore I cant use it as a an indicator to decide when to send this command. I have also included timestamps, to show you that I have given it about 7 minutes to register itself before I send the manual attach command.
at^sxrat=3
('Current Time =', '15:32:43')
at^sxrat=3
('Current Time =', '15:32:43')
"at^sxrat=3"
('Current Time =', '15:32:43')
"OK"
('Current Time =', '15:32:43')
"+CGREG: 0"
('Current Time =', '15:32:43')
"+CREG: 0"
at+cereg?
('Current Time =', '15:33:56')
at+cereg?
('Current Time =', '15:33:56')
"at+cereg?"
('Current Time =', '15:33:56')
"+CEREG: 1,0"
('Current Time =', '15:33:56')
"OK"
at+copn
('Current Time =', '15:40:13')
at+copn
('Current Time =', '15:40:13')
"at+copn"
('Current Time =', '15:40:13')
"+COPN: \"20201\",\"GR COSMOTE\""
('Current Time =', '15:40:13')
"+COPN: \"20205\",\"vodafone GR\""
('Current Time =', '15:40:13')
"+COPN: \"20209\",\"WIND GR\""
('Current Time =', '15:40:13')
"+COPN: \"20210\",\"WIND GR\""
('Current Time =', '15:40:13')
"+COPN: \"20402\",\"Tele2 NL\""
('Current Time =', '15:40:13')
"+COPN: \"20404\",\"vodafone NL\""
('Current Time =', '15:40:13')
"+COPN: \"20408\",\"NL KPN\""
('Current Time =', '15:40:13')
"+COPN: \"20412\",\"NL Telfort\""
('Current Time =', '15:40:13')
"+COPN: \"20416\",\"T-Mobile NL\""
('Current Time =', '15:40:13')
"+COPN: \"20601\",\"Proximus\""
('Current Time =', '15:40:13')
"+COPN: \"20610\",\"Orange B\""
('Current Time =', '15:40:13')
"+COPN: \"20620\",\"BASE\""
('Current Time =', '15:40:13')
"+COPN: \"20801\",\"Orange F\""
('Current Time =', '15:40:13')
"+COPN: \"20802\",\"F-Contact\""
('Current Time =', '15:40:13')
"+COPN: \"20809\",\"F SFR\""
('Current Time =', '15:40:13')
"+COPN: \"20810\",\"F SFR\""
('Current Time =', '15:40:13')
"+COPN: \"20811\",\"SFR FEMTO\""
('Current Time =', '15:40:13')
"+COPN: \"20813\",\"F - Contact\""
('Current Time =', '15:40:13')
"+COPN: \"20815\",\"Free\""
('Current Time =', '15:40:13')
"+COPN: \"20820\",\"F-Bouygues Telecom\""
('Current Time =', '15:40:13')
"+COPN: \"20888\",\"F - Contact\""
('Current Time =', '15:40:13')
"+COPN: \"21201\",\"vala\""
('Current Time =', '15:40:13')
"+COPN: \"21601\",\"Telenor HU\""
('Current Time =', '15:40:13')
"+COPN: \"21603\",\"DIGI Mobil HU\""
('Current Time =', '15:40:13')
"+COPN: \"21630\",\"Telekom HU\""
('Current Time =', '15:40:13')
"+COPN: \"21670\",\"vodafone HU\""
('Current Time =', '15:40:13')
"+COPN: \"21803\",\"HT ERONET\""
('Current Time =', '15:40:13')
"+COPN: \"21805\",\"m:tel\""
('Current Time =', '15:40:14')
"+COPN: \"21890\",\"BH Mobile\""
('Current Time =', '15:40:14')
"+COPN: \"21901\",\"HT HR\""
('Current Time =', '15:40:14')
"+COPN: \"21902\",\"Tele2 HR\""
('Current Time =', '15:40:14')
"+COPN: \"21910\",\"HR VIP\""
('Current Time =', '15:40:14')
"+COPN: \"22001\",\"Telenor SRB\""
('Current Time =', '15:40:14')
"+COPN: \"22003\",\"mt:s\""
('Current Time =', '15:40:14')
"+COPN: \"22005\",\"Vip SRB\""
('Current Time =', '15:40:14')
"+COPN: \"22201\",\"I TIM\""
('Current Time =', '15:40:14')
"+COPN: \"22210\",\"vodafone IT\""
('Current Time =', '15:40:14')
"+COPN: \"22250\",\"ILIAD\""
('Current Time =', '15:40:14')
"+COPN: \"22288\",\"I WIND\""
('Current Time =', '15:40:14')
"+COPN: \"22299\",\"3 ITA\""
('Current Time =', '15:40:14')
"+COPN: \"22601\",\"RO Vodafone RO\""
('Current Time =', '15:40:14')
"+COPN: \"22603\",\"TELEKOM.RO\""
('Current Time =', '15:40:14')
"+COPN: \"22605\",\"RO Digi.Mobil\""
('Current Time =', '15:40:14')
"+COPN: \"22610\",\"RO ORANGE\""
('Current Time =', '15:40:14')
"+COPN: \"22801\",\"Swisscom\""
('Current Time =', '15:40:14')
"+COPN: \"22802\",\"Sunrise\""
('Current Time =', '15:40:14')
"+COPN: \"23806\",\"3 DK\""
('Current Time =', '15:40:14')
"+COPN: \"23820\",\"Telia DK\""
('Current Time =', '15:40:14')
"+COPN: \"23866\",\"Telia-Telenor DK\""
('Current Time =', '15:40:14')
"+COPN: \"23877\",\"Telenor DK\""
('Current Time =', '15:40:14')
"+COPN: \"24001\",\"TELIA S\""
('Current Time =', '15:40:14')
"OPN: \"24202\",\"N NetCom\""
('Current Time =', '15:40:14')
"+COPN: \"24214\",\"ice.net\""
('Current Time =', '15:40:14')
"+COPN: \"24421\",\"FI elisa\""
('Current Time =', '15:40:14')
"+COPN: \"24436\",\"DNA - Sonera FI\""
('Current Time =', '15:40:14')
"+COPN: \"24491\",\"FI SONERA\""
('Current Time =', '15:40:14')
"+COPN: \"24601\",\"OMNITEL LT\""
('Current Time =', '15:40:14')
"+COPN: \"24602\",\"LT BITE GSM\""
('Current Time =', '15:40:14')
"+COPN: \"24603\",\"Tele2 LT\""
('Current Time =', '15:40:14')
"+COPN: \"24701\",\"LV LMT\""
('Current Time =', '15:40:14')
"+COPN: \"24702\",\"Tele2 LV\""
('Current Time =', '15:40:15')
"+COPN: \"24705\",\"BITE LV\""
('Current Time =', '15:40:15')
"+COPN: \"24801\",\"Telia\""
('Current Time =', '15:40:15')
"+COPN: \"24802\",\"Elisa EE\""
('Current Time =', '15:40:15')
"+COPN: \"24803\",\"Tele2 EE\""
('Current Time =', '15:40:15')
"+COPN: \"25001\",\"MTS RUS\""
('Current Time =', '15:40:15')
"COPN: \"25702\",\"MTS BY\""
('Current Time =', '15:40:15')
"+COPN: \"25704\",\"life:) BY\""
('Current Time =', '15:40:15')
"+COPN: \"25801\",\"MTS TM\""
('Current Time =', '15:40:15')
"+COPN: \"27402\",\"Vodafone\""
('Current Time =', '15:40:15')
"+COPN: \"27602\",\"Voda AL\""
('Current Time =', '15:40:15')
"+COPN: \"29501\",\"SwisscomFL\""
('Current Time =', '15:40:15')
"+COPN: \"302380\",\"KNET\""
('Current Time =', '15:40:15')
"+COPN: \"302500\",\"Videotron\""
('Current Time =', '15:40:15')
"+COPN: \"310250\",\"T-Mobile\""
('Current Time =', '15:40:15')
"+COPN: \"310530\",\"Iowa Wireless USA\""
('Current Time =', '15:40:15')
"+COPN: \"311080\",\"Pine Cellular\""
('Current Time =', '15:40:15')
"+COPN: \"311240\",\"USACWCI\""
('Current Time =', '15:40:15')
"+COPN: \"33490\",\"AT&T\""
('Current Time =', '15:40:15')
"+COPN: \"352110\",\"FLOW\""
('Current Time =', '15:40:15')
"+COPN: \"40431\",\"IND airtel\""
('Current Time =', '15:40:15')
"+COPN: \"40436\",\"Reliance\""
('Current Time =', '15:40:15')
"+COPN: \"40464\",\"CellOne\""
('Current Time =', '15:40:15')
"+COPN: \"40468\",\"IN-DOLPHIN\""
('Current Time =', '15:40:15')
"+COPN: \"40471\",\"CellOne\""
('Current Time =', '15:40:15')
"+COPN: \"40474\",\"CellOne\""
('Current Time =', '15:40:15')
"+COPN: \"40478\",\"IDEA\""
('Current Time =', '15:40:15')
"+COPN: \"40481\",\"CellOne\""
('Current Time =', '15:40:15')
"+COPN: \"40501\",\"Reliance\""
('Current Time =', '15:40:16')
"+COPN: \"40520\",\"Reliance\""
('Current Time =', '15:40:16')
"+COPN: \"40556\",\"IND airtel\""
('Current Time =', '15:40:16')
"+COPN: \"405750\",\"Vodafone IN\""
('Current Time =', '15:40:16')
"+COPN: \"405754\",\"Vodafone IN\""
('Current Time =', '15:40:16')
"+COPN: \"405800\",\"Aircel\""
('Current Time =', '15:40:16')
"+COPN: \"405810\",\"Aircel\""
('Current Time =', '15:40:16')
"+COPN: \"405832\",\"VIDEOCON\""
('Current Time =', '15:40:16')
"+COPN: \"405838\",\"VIDEOCON\""
('Current Time =', '15:40:16')
"+COPN: \"405843\",\"VIDEOCON\""
('Current Time =', '15:40:16')
"+COPN: \"405866\",\"IND-JIO\""
('Current Time =', '15:40:16')
"+COPN: \"405872\",\"IND-JIO\""
('Current Time =', '15:40:16')
"+COPN: \"41003\",\"PK-UFONE\""
('Current Time =', '15:40:16')
"+COPN: \"41503\",\"touch\""
('Current Time =', '15:40:16')
"+COPN: \"41603\",\"UMNIAH\""
('Current Time =', '15:40:16')
"+COPN: \"42402\",\"ETISALAT\""
('Current Time =', '15:40:16')
"+COPN: \"42505\",\"JAWWAL-PALESTINE\""
('Current Time =', '15:40:16')
"+COPN: \"42528\",\"Hot Mobile Ltd.\""
('Current Time =', '15:40:16')
"+COPN: \"42701\",\"Ooredoo\""
('Current Time =', '15:40:16')
"+COPN: \"42904\",\"SmartCell\""
('Current Time =', '15:40:16')
"+COPN: \"43601\",\"TCELL\""
('Current Time =', '15:40:16')
"+COPN: \"45417\",\"SmarTone HK\""
('Current Time =', '15:40:16')
"+COPN: \"46000\",\"CHINA MOBILE\""
('Current Time =', '15:40:16')
"+COPN: \"46009\",\"CHN-UNICOM\""
('Current Time =', '15:40:16')
"+COPN: \"46601\",\"Far EasTone\""
('Current Time =', '15:40:16')
"+COPN: \"46689\",\"T Star\""
('Current Time =', '15:40:16')
"+COPN: \"46697\",\"TW Mobile\""
('Current Time =', '15:40:16')
"+COPN: \"47003\",\"Banglalink\""
('Current Time =', '15:40:16')
"+COPN: \"50550\",\"Pivotel\""
('Current Time =', '15:40:16')
"+COPN: \"50572\",\"Telstra Mobile\""
('Current Time =', '15:40:16')
"+COPN: \"52505\",\"StarHub\""
('Current Time =', '15:40:16')
"+COPN: \"53901\",\"U-CALL\""
('Current Time =', '15:40:16')
"+COPN: \"60704\",\"Qcell\""
('Current Time =', '15:40:16')
"+COPN: \"61403\",\"ETISALAT NER\""
('Current Time =', '15:40:16')
"+COPN: \"61602\",\"ETISALAT BENIN\""
('Current Time =', '15:40:16')
"+COPN: \"61604\",\"BELL BENIN COMMUNICATION\""
('Current Time =', '15:40:16')
"+COPN: \"62804\",\"AZUR\""
('Current Time =', '15:40:16')
"+COPN: \"63903\",\"Airtel\""
('Current Time =', '15:40:16')
"+COPN: \"64003\",\"ZANTEL-TZ\""
('Current Time =', '15:40:16')
"+COPN: \"64703\",\"FREE MOBILE RE\""
('Current Time =', '15:40:16')
"+COPN: \"64901\",\"MTC NAMIBIA\""
('Current Time =', '15:40:16')
"+COPN: \"65310\",\"Swazi-MTN\""
('Current Time =', '15:40:16')
"+COPN: \"65501\",\"VodaCom-SA\""
('Current Time =', '15:40:16')
"+COPN: \"708030\",\"HND\""
('Current Time =', '15:40:16')
"+COPN: \"71203\",\"CLARO CR\""
('Current Time =', '15:40:16')
"+COPN: \"71403\",\"CLARO PA\""
('Current Time =', '15:40:16')
"+COPN: \"71610\",\"CLARO PER\""
('Current Time =', '15:40:16')
"+COPN: \"72404\",\"TIM BRA\""
('Current Time =', '15:40:16')
"+COPN: \"73404\",\"Movistar\""
('Current Time =', '15:40:16')
"+COPN: \"74002\",\"CNT\""
at+creg?
('Current Time =', '15:40:25')
at+creg?
('Current Time =', '15:40:25')
"at+creg?"
('Current Time =', '15:40:25')
"+CREG: 2,0"
('Current Time =', '15:40:25')
"OK"
at+cgreg?
('Current Time =', '15:40:33')
at+cgreg?
('Current Time =', '15:40:33')
"at+cgreg?"
('Current Time =', '15:40:33')
"+CGREG: 1,4"
('Current Time =', '15:40:33')
"OK"
at+cereg?
('Current Time =', '15:40:39')
at+cereg?
('Current Time =', '15:40:39')
"at+cereg?"
('Current Time =', '15:40:39')
"+CEREG: 1,0"
('Current Time =', '15:40:39')
"OK"
at^smoni=255
('Current Time =', '15:40:48')
at^smoni=255
('Current Time =', '15:40:48')
"at^smoni=255"
('Current Time =', '15:40:48')
"^SMONI: 4G,SEARCH"
('Current Time =', '15:40:48')
"OK"
at+cgatt=1
('Current Time =', '15:41:00')
at+cgatt=1
('Current Time =', '15:41:00')
"at+cgatt=1"
('Current Time =', '15:41:03')
"OK"
('Current Time =', '15:41:03')
"+CREG: 5,\"0131\",\"0021500A\",7"
('Current Time =', '15:41:03')
"+CEREG: 5"
('Current Time =', '15:41:03')
"+CGEV: ME PDN ACT 1"
Hello,
The module have to be attached to PS domain to be able to register to LTE. That is why auto attach is the recommended setting ("GPRS/AutoAttach" paramater of AT^SCFG commnad). In your case if it's disabled the module will never be able to register to LTE until you send AT+CGATT=1 command.