learning at command AT+CEREG

AT command AT+CEREG

【Purpose】

       Learning how to query the network registration status

 

【Eevironment】

       Shell terminal, base on gcom command and gcom script

 

【Procdeure】

      

gcom script :

root@IoTP:~# cat /etc/gcom/getcereg.gcom
opengt
 set com 115200n81
 set comecho off
 set senddelay 0.02
 waitquiet 0.2 0.2
 flash 0.1
 
:start
 send "AT+CEREG?^m"
 get  "^m" $s
 print $s
 get  "^m" $s
 print $s,"\n"
:continue
 exit 0

root@IoTP:~# cat /etc/gcom/setcereg.gcom
opengt
set com 115200n81
set comecho off
set senddelay 0.02
waitquiet 0.2 0.2
flash 0.1

:start
send "AT+CEREG=2^m"
get 1 "^m" $s
print $s
get 1 "^m" $s
print $s,"\n"
:continue
exit 0

test method:

root@IOTP:/etc/gcom# gcom  -d  /dev/ttyUSB1 -s  setcereg.gcom
 
AT+CEREG=
 
OK     
 
root@OpenWrt:/etc/gcom# gcom  -d  /dev/ttyUSB1 -s  getcereg.gcom
 
AT+CEREG?
 
+CEREG: ,,"","D0","523D306",

comparsion follow char , we can know module register in E-UTRAN network......