PLS8-E permanently switches between 3G and 4G | Telit Cinterion IoT Developer Community
March 3, 2021 - 6:38pm, 1271 views
Hi.
We have a PLS8-E here, that in the current configuration we want to run in
- automatic network selection
- without establishing a data connection (short messaging only).
Hard to reproduce, but repeatedly, it enters a state where it keeps registering and unregistering between 3G and 4G indefinitely, without ever reaching a stable connection. After a power cycle, or even a simple band reselection, this state is gone.
When this happens, different commands/URCs seem to have "different ideas" of what the actual registration status is.
I will post such an annoted sequence below, all of which happens repeatedly, indefinitely, within about 25 seconds.
I will make a follow up post with some additional configuration info.
Has anybody ever encountered this? Any ideas what is going on?
Thanks in advance.
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> AT+CREG?
... registered to home network in 3G
> AT^SMONI
... however SMONI says we are only camping
... URC: WCDMA PS attached (3G packet domain)
... URC: we are HSDPA PS attached ("3.5G" packet domain)
> AT^SMONI
... SMONI says again we are camping on 3G
... URC: we are E-UTRAN attached now (4G)
... URC: registered to home network in 4G
> AT+CGACT?
> AT+CGDCONT?
... we query CGACT and CGDCONT (redundantly, since we do not plan to set up a data connection in this configuration)
> AT+COPS=3,0;+COPS?;+COPS=3,1;+COPS?;+COPS=3,2;+COPS?
... we query the IDs of the current operator
rild: RIL processRequest() VOICE_REGISTRATION_STATE
> AT+CREG=2
... we redundantly enable registration URC
> AT+CREG?
.... we query CREG, and it now says we are registered to our home network in 3G
> AT^SMONI
... but SMONI says we do not even have a 3G network
... URCs inform us we are searching for an operator
... time
... URC: no service
... URC: camoed on E-UTRAN (4G)
... URC: no operator
... URC: GPRS not available??
Here's some configuration info. CPOL looks strange - this is an "E-Plus" card, a provider which was bought by Telefonica, so the IDs differ. But I also not it seems to have deselected LTE on the card, while in reality, it works (except the above mentioned glitch).
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ATI1
PLS8-E
REVISION 04.004
A-REVISION 01.000.06
AT^SCFG?
^SCFG: "Audio/Ecfg","0"
^SCFG: "Audio/Loop","0"
^SCFG: "Audio/SvTone","0"
^SCFG: "Call/ECC","0"
^SCFG: "Call/Speech/Codec","0"
^SCFG: "Call/VoLTE/Codec","0"
^SCFG: "GPRS/Auth","2"
^SCFG: "GPRS/AutoAttach","enabled"
^SCFG: "MEopMode/CFUN","0","1"
^SCFG: "MEopMode/DTM/Mode","1"
^SCFG: "MEopMode/ExpectDTR","current","acm1","acm2","acm3","acm4","rmnet0","rmnet1","asc0"
^SCFG: "MEopMode/ExpectDTR","powerup","acm1","acm2","acm3","acm4","rmnet0","rmnet1","asc0"
^SCFG: "MEopMode/IMS","1","mmtel"
^SCFG: "MEopMode/NonBlock/Cops","0"
^SCFG: "MEopMode/PingRsp","1"
^SCFG: "MEopMode/PowerMgmt/LCI","disabled"
^SCFG: "MEopMode/Prov/AutoSelect","on"
^SCFG: "MEopMode/Prov/Cfg","o2de"
^SCFG: "MEopMode/PwrSave","disabled","52","50"
^SCFG: "MEopMode/SRPOM","0"
^SCFG: "MEShutdown/OnIgnition","off"
^SCFG: "MEShutdown/Timer","off"
^SCFG: "Misc/CId",""
^SCFG: "Radio/Band","2928787"
^SCFG: "Radio/CNS","0"
^SCFG: "Radio/Mtpl","0"
^SCFG: "Radio/OutputPowerReduction","4"
^SCFG: "RemoteWakeUp/Event/ASC","none"
^SCFG: "RemoteWakeUp/Event/URC","none"
^SCFG: "RemoteWakeUp/Event/USB","none"
^SCFG: "RemoteWakeUp/Ports","current","acm1","acm2","acm3","acm4","rmnet0","rmnet1","asc0"
^SCFG: "RemoteWakeUp/Ports","powerup","acm1","acm2","acm3","acm4","rmnet0","rmnet1","asc0"
^SCFG: "RemoteWakeUp/Pulse","10"
^SCFG: "SIM/CS","SIM_1"
^SCFG: "SIM/Retry","on"
^SCFG: "SMS/4GPref","CSPS"
^SCFG: "SMS/AutoAck","0"
^SCFG: "SMS/Retrm",5
^SCFG: "Tcp/IPv6Priv","1"
^SCFG: "Tcp/Loop","disabled"
^SCFG: "Tcp/MR","10"
^SCFG: "Tcp/OT","6000"
^SCFG: "Tcp/TLS/Version","MIN","***"
^SCFG: "Tcp/UnreachRsp","1"
^SCFG: "Tcp/WithURCs","on"
^SCFG: "URC/DstIfc","app"
^SCFG: "URC/Ringline","local"
^SCFG: "URC/Ringline/ActiveTime","2"
^SCFG: "URC/Ringline/SelWUrc","all"
AT+CPLS?
+CPLS: 1
AT+CPOL?
+CPOL: 1,2,"24007",1,0,1,0
+CPOL: 2,2,"24010",1,0,1,0
+CPOL: 3,2,"23802",1,0,1,0
+CPOL: 4,2,"23877",1,0,1,0
+CPOL: 5,2,"23830",1,0,1,0
+CPOL: 6,2,"23820",1,0,1,0
+CPOL: 7,2,"24803",1,0,1,0
+CPOL: 8,2,"24491",1,0,1,0
+CPOL: 9,2,"27411",1,0,1,0
+CPOL: 10,2,"24702",1,0,1,0
+CPOL: 11,2,"24701",1,0,1,0
+CPOL: 12,2,"24603",1,0,1,0
+CPOL: 13,2,"24201",1,0,1,0
+CPOL: 14,2,"24201",1,0,1,0
+CPOL: 15,2,"24201",1,0,1,0
+CPOL: 16,2,"24201",1,0,1,0
+CPOL: 17,2,"24201",1,0,1,0
+CPOL: 18,2,"24201",1,0,1,0
+CPOL: 19,2,"24201",1,0,1,0
+CPOL: 20,2,"24201",1,0,1,0
+CPOL: 21,2,"24201",1,0,1,0
+CPOL: 22,2,"24201",1,0,1,0
+CPOL: 23,2,"24201",1,0,1,0
+CPOL: 24,2,"24201",1,0,1,0
+CPOL: 25,2,"24201",1,0,1,0
+CPOL: 26,2,"24201",1,0,1,0
+CPOL: 27,2,"24201",1,0,1,0
+CPOL: 28,2,"24201",1,0,1,0
+CPOL: 29,2,"24201",1,0,1,0
+CPOL: 30,2,"24201",1,0,1,0
+CPOL: 31,2,"24201",1,0,1,0
+CPOL: 32,2,"24201",1,0,1,0
+CPOL: 33,2,"24201",1,0,1,0
+CPOL: 34,2,"24201",1,0,1,0
+CPOL: 35,2,"24201",1,0,1,0
+CPOL: 36,2,"24201",1,0,1,0
+CPOL: 37,2,"24201",1,0,1,0
+CPOL: 38,2,"24201",1,0,1,0
+CPOL: 39,2,"24201",1,0,1,0
+CPOL: 40,2,"24201",1,0,1,0
+CPOL: 41,2,"24201",1,0,1,0
+CPOL: 42,2,"24201",1,0,1,0
+CPOL: 43,2,"24201",1,0,1,0
+CPOL: 44,2,"24201",1,0,1,0
+CPOL: 45,2,"24201",1,0,1,0
+CPOL: 46,2,"24201",1,0,1,0
+CPOL: 47,2,"24201",1,0,1,0
+CPOL: 48,2,"24201",1,0,1,0
+CPOL: 49,2,"24201",1,0,1,0
+CPOL: 50,2,"24201",1,0,1,0
Hello,
Is it observed on one device in a certain location or more devices in different locations or the devices is moving?
The signal quality is not too well so maybe that's the reason. The device is in the home network so this CPOL output is not relevant here.
If the device is not moving you may observe network quality parameters with SMONI and also LAC and cellIDs changing for some time and also compare to the situation when the network is stable. The ^SMONI: 3G,10737,163,-14.5,-102,262,03,558C,0C85180,7,10,--,NOCONN output actually means that the module is registered. In connected state there is a data connection active or a call.
Best regards,
Bartłomiej