
RYZ014 Modules
Use Cases with AT Commands
R19AN0075EU0150 Rev.1.50
Page 6 of 76
Mar.15.22
2.1.2 Use Cases
2.1.2.1 Select the SIM Slot
Command
Response
Comment
Power up the module
+SYSSTART
Check the number of supported SIM slots. If response is +CSUS: 1,skip the following steps because only one SIM
slot is available on the module.
AT+CSUS=?
+CSUS: 2
OK
The module has 2 SIM slots, it supports an external SIM (slot 0) and an
internal one (slot 1).
Check the SIM slot that is configured
AT+CSUS?
+CSUS: 1
OK
The internal SIM slot is configured
Change the SIM slot to external. First make sure that the modem is in +
CFUN=0
state, otherwise change it with
AT+CFUN=0
AT+CFUN?
+CFUN: 0
OK
AT+CSUS=0
OK
Select external SIM slot
AT+CSUS?
+CSUS: 0
OK
Verify that the change was considered
AT+CFUN=4
OK
Set the modem to airplane mode so that the SIM is read
AT+CIMI?
208019706849013
OK
Make sure that the IMSI corresponds to the one of the SIM you want to
use
If CIMI is sent before the modem finishes reading the SIM card, it will
return an error.
AT^RESET
OK
Restart the modem
+SHUTDOWN
+SYSSTART
AT+CSUS?
+CSUS: 0
OK
The configuration change is persistent at reboot
Notes: The number of SIM slots supported can be checked with
AT+CSUS=?
. This command can only be
used when the module is in
CFUN=0
state. The SIM slot configuration is persistent at reboot and SW
upgrade.
2.1.2.2 Power on the SIM Slot
Select one function mode among Airplane or Full functionality. Airplane mode disables both transmit and
receive RF circuits.
Command
Response
Comment
AT+CFUN=4
OK
Enter Airplane mode
or
AT+CFUN=1
OK
Enter Full functionality mode