Renesas RYZ014 Installation and operating instructions

Application Note
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RYZ014 Modules
Use Cases with AT Commands
Introduction
This document will provide RYZ014-based platform users with practicaluse cases of AT commands.
Target Device
RYZ014 modules.
Contents
1. General Introduction........................................................................................................... 5
2. Network Connection............................................................................................................ 5
2.1 Check that the SIM Card is Ready......................................................................................................5
2.1.1 Feature Description..........................................................................................................................5
2.1.2 Use Cases.......................................................................................................................................6
2.1.3 Error Handling..................................................................................................................................9
2.2 Configure the Operator Mode.............................................................................................................9
2.2.1 Feature Description..........................................................................................................................9
2.2.2 Use Cases.....................................................................................................................................10
2.2.3 Error Handling................................................................................................................................12
2.3 Connect to the Network and Check that Attach is Done....................................................................12
2.3.1 Feature Description........................................................................................................................12
2.3.2 Use Cases.....................................................................................................................................13
2.3.3 Error Handling................................................................................................................................15
3. How to Manage TLS Certificates ........................................................................................18
3.1 Feature Description..........................................................................................................................18
3.1. Use Cases with Certificates..............................................................................................................18
3.1.1 Identifya Free Certificate Index Entry.............................................................................................18
3.1.2 Add Certificate at Index 0...............................................................................................................20
3.1.3 Read Certificate at Index 0.............................................................................................................20
3.1.4 Remove Certificate at Index 0.........................................................................................................20
3.2 Use Cases with Private Keys............................................................................................................20
3.2.1 Upload a Private Key-at Index 1.....................................................................................................20
3.2.2 Read the Private Key at Index 1 .....................................................................................................21
3.2.3 Remove the Private Key at Index 1.................................................................................................21
3.3 Use Cases to Setup a Security Profile ..............................................................................................21
3.4 Error Handling..................................................................................................................................22
4. Proprietary FOTA...............................................................................................................22
4.1 Feature Description..........................................................................................................................22

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4.2 Use Cases .......................................................................................................................................23
4.2.1 Synchronous Upgrade using HTTPS Protocol.................................................................................23
4.2.2 Synchronous Upgrade using HTTPS Protocol with Certificates.......................................................24
4.2.3 Synchronous Upgrade using HTTPS Protocol and Credentials.......................................................24
4.2.4 Asynchronous Upgrade using HTTPS Protocol...............................................................................25
4.2.5 Cancel Asynchronous Upgrade with HTTPS Protocol.....................................................................26
4.2.6 Asynchronous Upgrade using FTP Protocol....................................................................................27
4.2.7 Cancel Asynchronous Upgrade with FTP protocol..........................................................................27
4.2.8 Asynchronous Upgrade though FTP using a Specific Port ..............................................................28
4.3 Error Handling..................................................................................................................................28
5. Data over UART................................................................................................................28
5.1 How to Send Data with UDP ............................................................................................................29
5.1.1 Feature Description........................................................................................................................29
5.1.2 Use Cases in Online Mode.............................................................................................................30
5.1.3 Use Cases in Command Mode.......................................................................................................30
5.1.4 Accept Any Remote Option ............................................................................................................31
5.1.5 Error Handling................................................................................................................................32
5.2 How to Send Data with TCP.............................................................................................................33
5.2.1 Feature Description........................................................................................................................33
5.2.2 Use Cases in Online Mode.............................................................................................................33
5.2.3 Use Cases in Command Mode with Text Data................................................................................35
5.2.4 Use Cases in Command Mode with Hex Data................................................................................35
5.2.5 Error Handling................................................................................................................................36
5.3 How to Send Data on HTTP Connection...........................................................................................36
5.3.1 Feature Description........................................................................................................................36
5.3.2 Use Cases with +SQNHTTP Commands........................................................................................36
5.3.3 Use Case with +SQNFGET Command...........................................................................................38
5.3.4 Use Case with +SQNFPUT Command...........................................................................................39
5.3.5 Error Handling................................................................................................................................40
5.4 How to Setup a Secure Socket Connection ......................................................................................40
5.4.1 Feature Description........................................................................................................................40
5.4.2 Use Cases.....................................................................................................................................40
5.4.3 Use Cases with Private Keys..........................................................................................................42
5.5 How to Use HTTPS AT Commands..................................................................................................42
5.5.1 Feature Description........................................................................................................................42
5.5.2 Use Cases with Certificate Validation..............................................................................................42
5.5.3 Test with no certificate in filesystem................................................................................................43
5.6 How to Use TFTP AT Commands....................................................................................................44
5.6.1 Feature Description........................................................................................................................44
5.6.2 Use Case.......................................................................................................................................44

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5.6.3 Use Cases.....................................................................................................................................44
5.7 How to Use FTP AT Commands......................................................................................................44
5.7.1 Feature Description........................................................................................................................44
5.7.2 Use Cases.....................................................................................................................................45
5.8 How to Use MQTT(S) Commands....................................................................................................45
5.8.1 Feature Description........................................................................................................................45
5.8.2 MQTT Server.................................................................................................................................46
5.8.3 Use Cases.....................................................................................................................................49
5.8.4 Error Handling................................................................................................................................55
6. SMS..................................................................................................................................55
6.1 How to Send and Receive SMS in Text Mode..................................................................................56
6.1.1 Feature Description........................................................................................................................56
6.1.2 Use Cases.....................................................................................................................................56
6.2 How to Send and Receive a SMS in PDU Mode...............................................................................58
6.2.1 Feature Description........................................................................................................................58
6.2.2 Use Case.......................................................................................................................................58
6.3 How to Manage SMS Storage..........................................................................................................59
6.3.1 Feature Description........................................................................................................................59
6.3.2 Use Cases.....................................................................................................................................59
6.3.3 Error Handling................................................................................................................................61
7. Low Power with eDRX and PSM ........................................................................................62
7.1 How to Use eDRX Feature...............................................................................................................62
7.1.1 Feature Description........................................................................................................................62
7.1.2 Use Cases.....................................................................................................................................64
7.2 How to Use PSM Feature.................................................................................................................64
7.2.1 Feature Description........................................................................................................................64
7.2.2 Use Case.......................................................................................................................................67
7.3 eDRX and PSM Troubleshooting......................................................................................................67
8. Informal Network Scan.......................................................................................................68
8.1 Feature Description..........................................................................................................................68
8.2 Use Cases.......................................................................................................................................68
8.2.1 AT+SQNINS Usage .......................................................................................................................68
8.2.2 Error Handling................................................................................................................................69
9. Factory Reset....................................................................................................................69
9.1 Feature Description..........................................................................................................................69
9.2 Use Cases.......................................................................................................................................69
9.2.1 Error Handling................................................................................................................................70
10. Hardware Configuration.....................................................................................................70

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10.1 UART Interfaces ..............................................................................................................................70
10.2 How to Configure the RING Signal...................................................................................................70
10.2.1 Feature Description........................................................................................................................70
10.2.2 Use Cases.....................................................................................................................................71
10.3 How to Configure Modem Alarms.....................................................................................................71
10.3.1 Feature Description........................................................................................................................71
10.3.2 Use Cases.....................................................................................................................................71
11. Manufacturing....................................................................................................................74
12. Appendix. Glossary and Abbreviations................................................................................74
Revision History........................................................................................................................76

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1. General Introduction
The host MCU can interact with the RYZ014 modem either through:
•AT commands
This is the focus of the current document.
•PPP protocol
Please refer to the document Data over UART with PPP for more details on PPP connection setup with
RYZ014 modules.
Note: Please refer to the System Integration Guide for more information on AT command types and AT
parser implementation advise.
2. Network Connection
By default, the modem starts in state +CFUN=0,meaning minimum functionality. Itwill not try to attach to the
network until the host MCU sets the +CFUN state to 1 meaning full functionality.
This section will help you to connect your RYZ014-based device to the network, following these simple steps:
1. Confirm that the SIM card in your device works properly
2. Confirm that your device is configured to interact with your operator’s network
3. Attach your device to the network
2.1 Check that the SIM Card is Ready
2.1.1 Feature Description
Depending on the RYZ014 module used, the modem can support one or two SIM slots (external only or
internal and external).
If an internal SIMis soldered in, , the AT+CSUS command should be used to switch from
one slot to another.
This section also provides instructions on how to check the SIM card state and lock or unlock the SIM card
with PIN or PUK code.

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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 SIMslots 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

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2.1.2.3 Check the SIM Card Status after Powering on the SIM Slot
Command
Response
Comment
Check the SIM
status
AT+CPIN?
+CPIN: READY
OK
SIM card is present and unlocked, ready to use
Option: Check the SIM card state by enabling +SQNSIMST URC
AT+SQNSIMST=1
OK
Enable SIM state URC
AT+CFUN=4
OK
Set the modem to airplanemode to read the SIM card
+SQNSIMST: 1
Start reading the SIM card
+SQNSIMST: 5
SIM card is now ready to use
AT+SQNSIMST?
+SQNSIMST: 1,5
OK
If URC are not enabled, it is possible to check the SIM state
with this command as well
2.1.2.4 Enable SIM Lock with PIN Code
Command
Response
Comment
AT+CLCK="SC",1,"0000"
OK
"SC": SIM (lock SIM/UICC card installed in the currently selected card
slot) (SIM/UICC asks password in MT power-up and when this lock
command issued)
1: lock
"0000": PIN code
2.1.2.5 Disable SIM Lock with PIN Code
Command
Response
Comment
Unlock SIM with correct PIN code
AT+CPIN="0000"
OK
"0000": PIN code
Disable SIM lock with correct PIN code.
AT+CLCK="SC",0,"0000"
OK
"SC": SIM (lock SIM/UICC card installed in the currently selected card
slot) (SIM/UICC asks for password in MT power-up and when this lock
command issued)
0: unlock
"0000": PIN code

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2.1.2.6 Enter PIN Code to Unlock SIM
Command
Response
Comment
Check current SIM card state
AT+CPIN?
CPIN: SIM PIN
OK
SIM PIN is required to unlock SIM card
Type PIN code to unlock with "1234" PIN code
AT+CPIN="1234"
ERROR
PIN code is not correct, SIM card is still locked
Type PIN code to unlock with "0000" PIN code
AT+CPIN="0000"
OK
PIN code is correct, SIM card unlocked
Check SIM card state
AT+CPIN?
+CPIN: READY
SIM card is present and unlocked, ready to use
2.1.2.7 Enter PUK Code to Unlock SIM
Command
Response
Comment
Check current SIM card state
AT+CPIN?
+CPIN: SIM PUK
OK
Require SIM PUK to unlock SIM card
Type PUK code to unlock with "12345678" PUK code
AT+CPIN="12345678"
ERROR
PUK code is not correct, SIM card is still locked
Type PUK code to unlock with "00000000" PUK code
AT+CPIN="00000000"
OK
PUK code is correct, SIM card unlocked
Check SIM card state
AT+CPIN?
+CPIN: READY
OK
SIM card is present and unlocked, ready to use

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2.1.3 Error Handling
•The SIM card is read only when the modem is in CFUN=1 (fully functional) or CFUN=4 (airplane mode)
states. Trying to access the SIM card with AT commands in CFUN=0 state will result in ERROR.
•SIM card is not present or not detected. In this case, verify that the right form SIM card is inserted
properly to the SIM slot, and check again.
Command
Response
Comment
Enable return final result code
AT+CMEE=2 OK Enable +CME ERROR: <err> result code and
use verbose <err> values
Check SIM card state
AT+CPIN?
+CME ERROR: SIM not inserted
SIM card is not present or not detected
The +CSUS command requires that the UE is in CFUN=0 state. If you get an error while using the +CSUS
command, first check how many SIM slots are supported by the module, and second confirm the CFUN=0
state.
Command
Response
Comment
Check the number of supported SIM slots (case only 1 slot)
AT+CSUS=?
+CSUS: 1
OK
Only one SIM slot is supported (external)
Trying to switch to the internal SIM slot results in error
AT+CSUS=1
+CME ERROR: ERROR
If the CFUN state is 1 or 4, the SIM slot cannot be switched
AT+CFUN?
+CFUN: 4
OK
AT+CSUS=1
+CME ERROR: ERROR
Change CFUN state to 0
AT+CFUN=0
OK
Check the number of supported SIM slots (case 2 slots)
AT+CSUS=?
+CSUS: 2
OK
External is #0, internal is #1.
Trying to switch to the internal SIM slot succeeds
AT+CSUS=1
OK
2.2 Configure the Operator Mode
2.2.1 Feature Description
RYZ014 modules can support up to 17 LTE bands. Scanning all the bands takes several minutes.
Specifically, cell detection duration per candidate EARFCN is 30ms/18mJ (1.3 µAh). Scanning the full 17
bands will take 186 seconds and consume 115J (8.4 mAh).

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To reduce the scanning duration, it is possible to configure the list of the bands that need to be scanned with
the AT+SQNBANDSEL command.
Several operator modes are configured by default in the software, to be able to work even if the user does
not know which bands should be configured. The operator mode can be selected with the AT+SQNCTM
command.
The operator mode enables the support of specific requirements requested by the various carriers, such as:
•Supported RF bands to scan
•Predefined scanning profile
•Roaming enabled or not

When roaming is disabled, you will not be able to attach with CEREG: 5 . Only CEREG: 1 will be
supported.
•Feature group in UE capability
•PDN configuration
•LwM2M support
AT+SQNBANDSEL? will give you the list of the predefined operator modes. By default, the software is configured
with standard operatormode.
The UE will scan in priority the EARFCN on which it managed to attach previously. It will then scan for all the
bands that are configured, without adding any priority between the bands when in standard mode.
Note: Please refer to the System Integration Guide for more information on the operator modes and the
scanning algorithm
2.2.2 Use Cases
2.2.2.1 Check the Currently Configured Operator Mode
Command
Response
Comment
By default the UE will be configured with the operator mode "standard".
AT+SQNCTM?
+SQNCTM: standard
OK
2.2.2.2 Limit the Number of Bands
Command
Response
Comment
Limit the number of bands to be scanned while in "standard" mode.
Check that you are using the standard mode
AT+SQNCTM? +SQNCTM: standard
OK
If not in standard mode, change it with:
AT+SQNCTM="standard"
OK
+SHUTDOWN
+SYSSTART
The modem will restart
AT+SQNCTM?
+SQNCTM: standard
OK
After reset, the CTM mode is
correctly set
Check the bands that are configured for each operator modes.

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Command
Response
Comment
AT+SQNBANDSEL?
+SQNBANDSEL:
0,3gpp-conformance,""
+SQNBANDSEL: 0,att,"2,4,12"
+SQNBANDSEL:
0,docomo,"1,19"
+SQNBANDSEL: 0,dtag,"3,8,20"
+SQNBANDSEL: 0,kddi,"18,26"
+SQNBANDSEL:
0,orange,"20,3"
+SQNBANDSEL:
0,softbank,"1,8"
+SQNBANDSEL:
0,soracom,"2,4,12"
+SQNBANDSEL: 0,sprint,"2,4,5,12,25"
+SQNBANDSEL:
0,standard,"1,2,3,4,5,8,12,13,17
,18,19,20,25,26,28,66"
+SQNBANDSEL:
0,telstra,"3,28"
+SQNBANDSEL:
0,telus,"12,4,5"
+SQNBANDSEL:
0,truphone,"1,2,4,8,12,20"
+SQNBANDSEL: 0,verizon-no-roaming,"4,13"
+SQNBANDSEL: 0,verizon,"13,4,5,12,17,20"
+SQNBANDSEL:
0,vodafone,"20,8" (...)
OK
17 bands are configured for
the standard operator mode.
Reduce the number of bands to be scanned
AT+SQNBANDSEL=0,"st
andard","
3,8,20"
+SQNBANDSEL:
0,standard,"3,8,20"
OK
The bands to be scanned will
be limited to bands 3, 8 and
20, there is no priority
between these 3 bands,
enter the band in any order.
The more bands the modem
must scan, the longer it will
take to attach to the network.
Please keep in mind that it
takes around 30 ms to scan
one EARFCN.

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2.2.2.3 Select a Specific Operator Mode
Command
Response
Comment
Select a specific operator mode.
If you don't know which bands to be scanned, you can select a specific operator mode by hand.
AT+SQNCTM=? +SQNCTM: ("3gpp-
conformance",
"ais", "aptg", "att", "bell",
"cht",
"cta", "dialog", "dish",
"docomo",
"dtag", "etisalat", "kddi",
"kpn",
"kt", "lgu", "orange",
"ptcrb",
"singtel", "skt", "softbank",
"soracom", "spark",
"sprint",
"standard", "swisscom",
"telenor",
"telstra", "telus", "tim",
"truphone",
"turkcell", "verizon",
"vodafone")
OK
Check the list of supported operator
modes
In this example, select “orange” operator mode.
AT+SQNCTM="orange"
OK
+SHUTDOWN
+SYSSTART
The modem restarts.
AT+SQNCTM=?
+SQNCTM: orange
OK
Read the operator mode.
For Advanced user only:
You can also use +SQNBANDSEL command to reduce the number of bands scanned in a specific operator
mode. Please note that you can only reduce the bands to be scanned and not add a new one. When
adding a new band, the AT command will not return any error, but the new band will not
be scanned by
the modem. It is highly recommended to use the
+SQNBANDSEL command with the standard operator
mode only.
AT+SQNBANDSEL=0,"orange","20" +SQNBANDSEL:
0,orange,"20"
OK
Scanning is now limited to LTE Band
20. It was previously LTE Band 20
and Band 3.
2.2.3 Error Handling
The +SQNBANDSEL command shall be used only to limit the number of bands to be scanned compared to
the default configuration. You cannotadd a new band to scan with this command. If you enter the
+SQNBANDSEL command with a band that was not set for a specific operator mode in the factory reset
settings, it will be ignored: the command will not return any error, but the band will not be scanned.
2.3 Connect to the Network and Check that Attach is Done
2.3.1 Feature Description
This section describes how to attach to ordetach from the network.

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The related AT commands are:
•AT+CEREG
•AT+CFUN
•AT+CGACT
•AT+CGATT
•AT+CGCDCONT
•URC +CEREG
2.3.2 Use Cases
2.3.2.1 Attach to the Network
Command
Response
Comment
Insert a SIM card and power-on the UE
AT+CFUN=1 OK UE should attach to network automatically.
+CEREG:2 By default, <n> parameter if +CEREG URC is set to 2 to enable
network registration and URC.
+CEREG:1,”0002”,”01A2
2002”,7
2.3.2.2 Check the Network’s Registration Status
Command
Response
Comment
Query network registration status
AT+CEREG?
+CEREG: 0,1
OK
0: network registration URC disabled
1: registered, home network
2.3.2.3 Check the PDP Context Configuration
Command
Response
Comment
Get current PDP context configuration
AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","broadband",,,,0,0,0,0,0,0,0,,0
+CGDCONT: 2,"IPV4V6","lwaactivate",,,,0,0,0,0,0,0,0,,0
+CGDCONT: 3,"IPV4V6","custom",,,,0,0,0,0,0,0,0,,0
+CGDCONT: 4,"IPV4V6","attm2mglobal",,,,0,0,0,0,0,0,0,,0 OK
Get current PDP context activation state
AT+CGACT?
+CGACT: 1,1
+CGACT: 2,0
+CGACT: 3,0
+CGACT: 4,0
OK
PDP context with cad 1 is activated

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2.3.2.4 Activate the PDP Context
Command
Response
Comment
AT+CGACT=1,3
OK
1: activate PDP context 3: cid 3
Query PDP context activation state
AT+CGACT?
+CGACT: 1,1
+CGACT: 2,0
+CGACT: 3,1
+CGACT: 4,0
OK
PDP context with cid 3 is activated in addition of PDP context with
cid 1.
2.3.2.5 Check IP Address
Command
Response
Comment
List IP address of all cids
AT+CGPADDR
+CGPADDR:
1,"192.168.6.3","32.1.4.104.48.6.0.3.3
2.1.4.104.48.6.0.3"
+CGPADDR:
2
+CGPADDR:
3,"192.168.11.2"
+CGPADDR:
4
OK
cid
1, IPv4 and IPv6 address
cid 2,
not activated, no IP address
cid
3, IPv4 address
Query IP address of cid=1
AT+CGPADDR=1
+CGPADDR:
1,"192.168.6.3","32.1.4.104.48.6.0.3.3
2.1.4.104.48.6.0.3"
OK
cid 1, IPv4 and IPv6 address
2.3.2.6 Detach from the Network
Command
Response
Comment
AT+CFUN=0
OK
Power-off UE
+CEREG:0
2.3.2.7 Force an Attachment to a Specific Operator (AT+COPS)
Command
Response
Comment
AT+COPS is available only when the modem is set to full functionality (CFUN: 1 state)
AT+CFUN=1
OK
+CEREG: 2
Deregister from the network

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Command
Response
Comment
AT+CGATT=0
OK
+CEREG: 0
AT+COPS=1,2,"310410",7
OK
Force
the modem to attach onAT&T
network
+CEREG: 2
+CEREG: 5,"0936","0C702F0F",7
2.3.3 Error Handling
2.3.3.1 If CEREG? returns status 0
If CEREG? returns status 0, the UE isnot registered, and is not currently searching an operator to register
to.
Command
Response
Comment
AT+CEREG?
Query network registration status
+CEREG: 0,0
OK
Possible causes:
SIM card error: SIM card not detected, PIN code not entered, SIM card read error.
The registration is not started (+COPS=2): execute the actions below.
AT+CFUN?
Check if current CFUN state is 1
+CFUN: 1
OK
AT+CGATT=1 OK Force EPS attach
2.3.3.2 If CEREG? returns status 2
If CEREG? returns status 2, the modem not registered, but it is currently trying to attach or is searching an
operator to register to.

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Command
Response
Comment
AT+CEREG?
Query network registration status
+CEREG: 0,2
OK
Possible causes:
No network available
Available networks have insufficient Rx level
HPLMN or allowed PLMN are available but the registration is rejected, e.g. roaming is not allowed in this Location
Area
Wait for the module to retrieve a coverage (no action required)
+CEREG:1
Verify reception signal strength. In the response below <rssi> is the signal strength of the antenna, and <ber> is the
bit error rate in percent. Please refer to AT Commands User’s Manual for details on values and levels.
AT+CSQ
+CSQ: <rssi>,<ber>
If the signal strength is low, change to a different
position and try again.
AT+CEREG?
Query network registration status
+CEREG: 0,4
OK
Check current signal
strength
AT+CSQ
+CSQ: 18,99 or not
detectable
OK
18: RSSI -77dBm
99: channel ber, not known
If the signal strength is low, change to a different
position and try again.

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2.3.3.3 If CEREG? returns status 3
If CEREG? returns status 3, the registration is denied.
Command
Response
Comment
AT+CEREG?
Query network registration status
+CEREG: 0,3
OK
Possible causes:
•Illegal mobile equipment
•IMSI unknown at HLR (Home Location Register)
•PLMN not allowed
Actions:
1. Check if right SIM card and right device is used
2. Check if right PLMN is selected with the command below
AT+COPS?
Check the operator mode
+COPS: 0,0,"Amarisoft Network",7
OK
0: automatic operator select mode
0: long format alphanumeric
<oper>
"Amarisoft Network": <oper> name
7: E-UTRAN
2.3.3.4 If CEREG? returns status 4
If CEREG? returns status 4, an unknown error occurred (for example: out of E-UTRAN coverage).
Command
Response
Comment
AT+CEREG?
Query network registrationstatus
+CEREG: 0,4
OK
Check current signal strength
AT+CSQ
+CSQ:
18,99 or not detectableOK
18:
RSSI -77dBm
99:
channel ber, not known
If
the signal strength is low, change to
a different position and try again.
If CEREG? returns status 80, a PLMN loss indication is received from RRC. Most frequently, this means that
the modem got rejected from the network.
Command
Response
Comment
AT+CEREG?
Query network registrationstatus
+CEREG: 0,80
OK
Check
your SIM card validity

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2.3.3.5 APN configuration
In LTE-M, APN auto configuration is sufficient in most cases. There is no need for the user to set a specific
APN. In case a specific APN needs to be set, the following command can be applied. These APN settings
are persistent at reboot.
On AT&T specifically, if the APN is different from the one mentioned in the above examples, the SMS
services will not be functional.
Command
Response
Comment
AT+CGDCONT=1,"IPV4V6","m2m.
com.attz",,,,0,0,0,0,0,0,0,,0
OK
Apply m2m.com.attz APN
AT+CGDCONT?
+CGDCONT:
1,"IPV4V6","m2m.com.attz",,,,0,0,0,
0,0,0,0,,0
OK
Check the new APN settings
3. How to Manage TLS Certificates
3.1 Feature Description
For the best security, we strongly advise that you configure mutual authentication TLS connections.This can
be done by configuring a client certificate, a public key, and the corresponding private key. T
hey are all stored
in the non-volatile memory.
AT+SQNSNVW is used to write or delete data in the non-volatile memory using
“certificate” or “privatekey”parameters with the specific index inthe file system. The file size
corresponds to the exact number of bytes to be uploaded.
After an AT+SQNSNVW write command is issued, the user sends certificate bytes in PEM (Privacy- enhanced
Electronic Mail) format. To delete a certificate or a private key, the user simply writes a ‘0’-byte certificate or
private key using file ID as <index>. RYZ014A modules hold 20 slots to store certificates and 20 slots for
private keys. These files are stored on the file system of the module.
There is no specific limitation on the size of the certificate that can be stored at one given index other than
the size of the file system itself. CA certificates chain is supported: it is possible to combine several root CA
certificates into one. The module is preloaded with default certificates needed to connect to some operator
specific LwM2M servers
3.1. Use Cases with Certificates
To get the file size, use Linux command ls -l filename, or DOS command dir, or open the file with
Notepad to check its length.
3.1.1 Identify a Free Certificate Index Entry
Command
Response
Comment
Monarch modules come with some pre-provisioned certificates.
AT+SQNSNVR="certificate"

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Command
Response
Comment
+SQNSNVR: "certificate",1,"/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006 VeriSign, Inc. - For
authorized use only/CN=VeriSign Class 3 Public Primary Certification Authority
-
G5","000000000000000000000000000000000000000000000000","/C=US/O=VeriSign,
In
c./OU=VeriSign Trust Network/OU=(c) 2006 VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3 Public
Primary Certification
Authority - G5","06/11/08 00:00:00","36/07/16
23:59:59","sha1RSA","0000000000000000000000000000000000000000000000000000000000
00000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000","sha1","52b1
d7e64e2e1a453322ced6aa1c993bcb11f187"
+SQNSNVR: "certificate",2,"/C=US/O=DigiCert Inc/OU=
www.digicert.com/CN=DigiCert Global Root
CA","0000000000000000","/C=US/O=DigiCert Inc/OU=
www.digicert.com/CN=DigiCert Global Root CA","06/11/10
00:00:00","31/11/10
00:00:00","sha1RSA","000000000000000000000000000000000000000
000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000
00000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000","sha1","9aacd9b54b2f972ef2e1bd488eb550afcc462d46"
+SQNSNVR: "certificate",3,"/C=US/O=DigiCert Inc/OU=
www.digicert.com/CN=DigiCert Global Root
CA","0000000000000000","/C=US/O=DigiCert Inc/OU=
www.digicert.com/CN=DigiCert Global Root CA","06/11/10
00:00:00","31/11/10
00:00:00","sha
1RSA","000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000
000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000","sha1","4418290c0af661843b28c70f4eb728f4cc462960"
+SQNSNVR: "certificate",4,"/CN=root/OU=Se
rvice Platform Development department/O=SoftBank Corp./L=Minato-
ku/C=JP","000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000","/CN=root/OU=Service Platform Development
department/O=SoftBank
Corp./L=Minato-ku/C=JP","18/02/26 01:33:37","19/02/26
01:33:37","sha256ECDSA","0000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000","sha1","38db2b4bde4278b9f460cd175ec4c04f88fbc
9b8"
OK
Indexes 1 to 4 are already used. If you wish to keep them and add a new certificate, choose any otherindex
between 0 and 19.

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3.1.2 Add Certificate at Index 0
Command
Response
Comment
Upload a certificate type file with size 1078 bytes into the file system.
AT+SQNSNVW="certificate",0,1078
>
After prompt '>', enter the data from certificate file and type enter in the end.
-----
BEGIN CERTIFICATE-----
MIIC8DCCAlmgAwIBAgIJAOD63PlXjJi8MA0GCSqGSIb3DQEBBQUAMIGQMQswCQYD
VA+GIbdYKO3JprPxSBoRponZJvDGEZuM3N7p3S/lRoi7G5wG5mvUmaE5RAgMBAAGj
(
)REyPOFdGdhBY2P1FNRy0MDr6xr+D2ZOwxs63dG1nnAnWZg7qwoLgpZ4fE
SPD3PkA
1ZgKJc2zbSQ9fCPxt2W3mdVav66c6fsb7els2W2Iz7gERJSX END
CERTIFICATE-----
OK
3.1.3 Read Certificate at Index 0
Command
Response
Comment
AT+SQNSNVR="certificat e",0
Read certificate at index 0
+SQNSNVR:
"certificate",0,"/C=GB/ST=United
Kingdom/L=Derby/O=Mosquitto/OU=CA/CN=mosquitto.org/emailAddr
ess=[e-mail]"
,"0000000000000000000000000000000000000 000000
000000000000000000000000000000000000000000(...)0000000000000
0000000
000000000
00000000000000000000000000","/C=GB/ST=United
Kingdom/L=Derby/O=Mosquitto/OU=CA/CN=mosquitto.org/emailAddr
ess=[e-mail]"
,"12/06/29 22:11:59","22/06/27
22:11:59","sha1RSA","00000000000000000000","sha1
","1d214e931ab1
da59c 1e08f025f268d2783a51f0a"OK
3.1.4 Remove Certificate at Index 0
Command
Response
Comment
AT+SQNSNVW="certificate",0,0
OK
Remove certificate at index 0
3.2 Use Cases with Private Keys
3.2.1 Upload a Private Key-at Index 1.
Command
Response
Comment
Upload a private key type file with size 1679 bytes into file system at index 1.
AT+SQNSNVW="privatekey",1,167 9
>
After prompt '>', enter the data from certificate file and press Enter at the end.
-----BEGIN RSA PRIVATE KEY-----
MIIEpQIBAAKCAQEA0DeexyAY2TP1LeRL/MR7nVXzq+eQysfvZCzZVy39KXPtSaGL
5gHjlGS2ufB9ZB3KgOxSMlF+W7oqB6xa5FLMD4YQfgQiUux6kmuQZ4r3yvCUlOxD
(
)h46R1gIvDPGBeS0r7Ex4ILu
WCYDIWrQ740KaxODp8+z10GfqFzKMq7eVFBl6gBtzU1JMs7L12qnx7U+rJqf0zL7
/yoN9g25RqCbUczK1h9gk
wky1TVKnZDK2+gE JJjNhnbp8T4zgPiS8X/V0YypVeTnu2Yl7oXFDeHeci77DKXcGz5eWMo
= -----END RSA PRIVATE KEY-----