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Xinyuan-LilyGO / T-SIM7600X

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Why some sim not connect to network? #79

Open Tejas2017610 opened 5 months ago

Tejas2017610 commented 5 months ago

AT Command Dump :

AT+CPIN?

+CPIN: READY

OK
[20050] Waiting for network...
AT+CGREG?

+CGREG: 0,1

OK
AT+CGREG?

+CGREG: 0,1

OK
[20072] Network connected
[20072] Connecting to 
AT+NETCLOSE

+NETCLOSE: 2

ERROR
AT+CGDCONT=1,"IP","","0.0.0.0",0,0

OK
AT+CIPMODE=0

OK
AT+CIPSENDMODE=0

OK
AT+CIPCCFG=10,0,0,0,1,0,75000

OK
AT+CIPTIMEOUT=75000,15000,15000

OK
AT+NETOPEN

OK

+NETOPEN: 0AT+NETOPEN?

+NETOPEN: 1

OK

AT+COPS?

+COPS: 0,0,"JIO 4G Jio",7

OK
[20288] Operator: JIO 4G Jio
AT+IPADDR

+IPADDR: 25.55.188.159

OK
[20300] Local IP: 25.55.188.159
AT+CSQ

+CSQ: 28,99

OK
[20310] Signal quality: 28
[20310] Connecting to  vsh.pp.ua
AT+CIPCLOSE=0

+CIPCLOSE: 0,4

ERROR
AT+CIPRXGET=1

OK
AT+CIPOPEN=0,"TCP","vsh.pp.ua",80

OK

AT+CSQ: here 99 says network not detected; +CIPCLOSE: 0,4 means?

What might be the reason for this? Is it not a good range? wrong apn? Is it a band issue? Wait for some time as I think its signal quality seems ok below -100dbm. How does this take time if we compare it with gsm tech use in our mobile phones? Thanx : )

Tejas2017610 commented 5 months ago

This Problem I solved this Using the different SimCard that supports IoT devices. When we do call the modem changes the network GPRS to calling network band and hence after the call hangup it doesn’t switch fast so it won’t connect but in IoT sims, this will happen fast and get connected. Also, some Sims don’t like this way of switching the network and hence it may take time, or refuse to connect. 3 sim use

  1. jio : This sim never connects to the internet only as it uses VOLTE and this module need to update support of VOLTE
  2. mnet : This connects to the internet but when do call then refuses to connect internet
  3. airtel : Always connect fast and do calls with no issues This is based on my experience.