NB-IoT Module Series
BC26 AT Commands Manual
BC26_AT_Commands_Manual 17 / 73
Parameter
If there is any error, response:
+CME ERROR:<err>
Test Command
AT+CEREG=?
Response
+CEREG:
(list of supported
<n>
s)
OK
<n>
Integer type
0 Disable network registration unsolicited result code
1 Enable network registration unsolicited result code:
“+CEREG:<stat>”
2 Enable network registration and location information unsolicited result code:
“+CEREG:<stat>[,[<tac>],[<ci>],[<AcT>]]”
3 Enable network registration, location information and EMM cause value information
unsolicited result code:
“+CEREG:<stat>[,[<tac>],[<ci>],[<AcT>][,<cause_type>,<reject_cause>]]”
4 For a UE that requests PSM, enable network registration and location information
unsolicited result code:
“+CEREG:<stat>[,[<tac>],[<ci>],[<AcT>][,,[,[<Active-Time>],[<Periodic-TAU>]]]]”
5 For a UE that requests PSM, enable network registration, location information and
EMM cause value information unsolicited result code:
+CEREG:<stat>[,[<lac>],[<ci>],[<AcT>],[<rac>][,[<cause_type>],[<reject_cause>][,[<A
c tive-Time>],[<Periodic-RAU>]]]]
<stat>
Integer type, indicates the EPS registration status
0 Not registered, MT is not currently searching an operator to register to
1 Registered, home network
2 Not registered, but MT is currently trying to attach or searching an operator to register
to
3 Registration denied
4 Unknown
5 Registered, roaming
6 Registered for “SMS only”, home network (applicable only when
<Act> indicates NB-IoT)
7 R
egistered for “SMS only”, roaming (applicable only when
<Act> indicates NB-IoT
8 Attached for emergency bearer services only
9 Registered for “CSFB not preferred”, home network (not applicable)
10 Registered for “CSFB not preferred”, roaming (not applicable)
<tac>
String type; two bytes
tracking area code in hexadecimal format (e.g. “00C3” equals 195 in
decimal)
<ci>
String type; four bytes E-UTRAN cell ID in hexadecimal format
