Sony Pixel Power calrec Sony

Initial Modem Setup Guide

27/03/2025

Applicable Products Part number Description

ZETA-GEP-LTE4 (EU) Low Power LTE Cat 4 European Modem with GPIO and GNSS

ZETA-G-GPRS Entry Level GPRS Modem with GNSS (GL)

ZETA-N2-GPRS Entry Level GPRS Modem (GL)

ZETA-NEP-LTE4 (EU) Low Power LTE Cat 4 European Modem with GPIO

ZETA-NEP-LTEM (GL) Low Power Global LTE Cat M Modem with GPIO

ZETA-NLP-LTE1 (EU) Ultra Low Power European LTE Cat 1 Modem

ZETA-NLP-LTEM (GL) Ultra Low Power Global LTE Cat M Modem

ZETA-N-LTE (EU) High Performance LTE Cat 4 Modem with GPIO

ZETA-NSP-LTE1 (EU) Low Power European LTE Cat 1 Modem

Objective All industrial modems requires initial set up, so that they can communicate with other modems on the cellular networks using AT commands. This application note shows how this is done for Siretta ZETA modems and ensure that the modem is correctly configured to communicate over cellular network.

Demonstration of Solution Resources:

PC with an installed Terminal Emulator' program: A Windows 10 laptop installed with Tera Term was used for the purpose of this guide.

Siretta Part Number: 61057 -ZETA-GEP-LTE4 (EU) Starter Kit (any ZETA starter Kit is suitable for this application)

Insert SIM card to the modem

Power on the modem

Connect the supplied serial port cable to the PC

Connect the antenna

As described in the Starter Kit Quick Start Guide

Open Hyperterminal on the PC (or your preferred terminal emulator: PuTTY, TeraTerm).

Select new connection. Name the new connection for reference in the future.

Name your port.

8. Choose the correct COM port. From the drop-down list, select the correct COM port your modem is connected to.

9. Configure the port with the following settings (These settings are standard for all of the ZETA Siretta modems):

Bits per second: 115200

Data bits: 8

Parity: None

Stop bits: 1

Flow control: Hardware

10. Click Apply

11. Send the initial AT' command to determine the serial communication with the modem is working correctly. If communication is successful. you will get an OK' response from the modem. You can then issue any other commands as required.

Commands to Check System is Working

Check Serial Port is Working

AT

//Receive following when successful:

OK

Set Verbose Error Reporting

AT CMEE=2

//Receive following when successful:

OK

Commands for Basic Operation

Check PIN Registration

AT CPIN?

//Receive following when successful:

CPIN: READY

OK

//Receive following when SIM is not inserted:

CME ERROR: SIM not inserted

//Receive following when SIM requires a PIN code:

CME ERROR: SIM pin

Query Firmware Version

AT GMR

//Receive following when successful:

Firmware version (make a note of this)

Query IMEI Number

AT CGSN

//Receive following when successful:

IMEI number (make a note of this)

Cellular Network Operation Set Network Registration to ALL'

AT COPS=0

//Receive following when successful:

OK

Check Network Registration

AT CREG?

//Receive following when registered to a local network:

CREG: 0,1

//Receive following when registered to a roaming network:

CREG: 0,5

//Receive following when not registered to a network:

CREG: 0,0

//Receive following when not searching for a network:

CREG: 0,2

//Receive following when registration is denied:

CREG: 0,3

NOTE:

When experiencing registration problems, check the following:

1) Antenna is connected and screwed in tightly to unit

2) SIM is valid and has credit / active

3) SIM is setup for 2G / 3G / 4G services

4) SIM is SMS enabled

5) There is signal available for the cellular network in use

6) Ensure more than 15 seconds has elapsed since power up.

Check Network Signal Strength AT CSQ

//Receive signal value >9 when successful:

CSQ: 23,1

//Receive signal value =99 when there is no signal:

CSQ: 99,1

//Receive signal value less than 9 when there are network connectivity issues:

CSQ: 3,1

NOTE:

When experiencing bad network signal strength (less than 9), check the following:

1) Antenna is suitable for network in use and is tightly screwed to unit

2) There is good signal available for the cellular network in the area

3) Move the antenna near a window or preferably outside

4) Move the antenna to an elevated position (> 3M high)

5) Use a high gain antenna

6) Ensure short cable length (less than 3M) for cable connecting antenna to modem

GPRS Network Operation Check GPRS Context Availability

AT CGATT?

//Receive following when successful:

CGATT: 1

OK

//Receive following when content is not available or not enabled:

CGATT: 0

OK

Set GPRS APN For Your Network

AT CGDCONT=1, IP , APN Name

//Receive following when successful:

OK

NOTE:

To configure the APN name correctly, follow these steps :

1) Navigate to the following link: Common Global APN Settings

2) Select the country you are in (If your country is not listed please contact Siretta)

3) Select the network from the list (If your network is not listed please contact Siretta)

4) Insert the APN name from the table in to the APN Name field in the AT CGDCONT' command

Connect To GPRS Context AT#SGACT=1,1, APN Username , APN Password

//Receive following when successful (Where x.x.x.x is your assigned IP address):

#SGACT: x.x.x.x

OK

//Receive following when the APN Name / APN Username / APN Password is incorrect:

ERROR

NOTE:

To configure the APN username and password correctly, follow these steps:

1) Navigate to the following link: Common Global APN Settings

2) Select the country you are in (If your country is not listed please contact Siretta)

3) Select the network from the list (If your network is not listed please contact Siretta)

4) Insert the APN username from the table in to the APN Username field in the AT#SGACT' command

5) Insert the APN password from the table in to the APN Password field in the AT#SGACT' command.

Setup T
LINK: https://www.siretta.com/2025/03/initial-modem-setup-guide/...
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