SIM7100e does not connect to the operator

sim7100

#1

Hi, good day.

I’m having problems to connect simcom sim7100e module.

In previous projects with different modules i had not problem with this since they do connect automatically to the available network operator but this time the module is not connectig itself. I left downbelow some AT commands responses that I consider relevant for you to help me

at+creg?
+CREG: 0,2
OK

at+csq
+CSQ: 99,99
OK

at+cops=?
+COPS: (1,“Telcel GSM”,“TELCEL”,“334020”,2),(1,“movistar”,“movistar”,“33403”,2),(0,1,2,3,4,5),(0,1,2)
OK

at+cbc
+CBC: 3.293V
OK

at+autocsq=1,1
+CSQ: 21,99

Booting…

SMS DONE
PB DONE

You can notice that there is not signal for a while so I use at+autocsq to get a report when the signal quality change and when it does the module is rebooting I’m really lost here because this have never happened in previous projects.

I have proved with two diferents sim from different brand and it is the same but when I tried the module without any sim the module gets a good constant CSQ so I don’t rule out the posibility that it could be the sims

I’ll appreciate any help you can give to get the module connected, thank you in advance.


#2

Why is battery voltage at 3.2V?
Should it not be 4V?