Additional documentation is available at https://multitech.com/all-products/cellular/embedded-modems/multitech-socketmodem-mtq-iot-cellular-embedded-modem-and-system-on-module/. Select your model to find the documents specific for that device.

Due to the possibility of radio frequency (RF) interference, it is important that you follow any special regulations regarding the use of radio equipment. Follow the safety advice given below.

• Operating your device close to other electronic equipment may cause interference if the equipment is inadequately protected. Observe any warning signs and manufacturers’ recommendations.
• Different industries and businesses restrict the use of cellular devices. Respect restrictions on the use of radio equipment in fuel depots, chemical plants, or where blasting operations are in process. Follow restrictions for any environment where you operate the device.
• Do not place the antenna outdoors.
• Turn off your wireless device when in an aircraft. Using portable electronic devices in an aircraft may endanger aircraft operation, disrupt the cellular network, and may be illegal. Failing to observe this restriction may lead to suspension or denial of cellular services to the offender, legal action, or both.
• Turn off your wireless device when around gasoline or diesel‑fuel pumps and before filling your vehicle with fuel.
• Turn off your wireless device in hospitals and any other place where medical equipment may be in use.

Sécurité relative aux appareils à radiofréquence (RF)

À cause du risque d'interférences de radiofréquence (RF), il est important de respecter toutes les réglementations spéciales relatives aux équipements radio. Suivez les conseils de sécurité ci-dessous.

• Utiliser l'appareil à proximité d'autres équipements électroniques peut causer des interférences si les équipements ne sont pas bien protégés. Respectez tous les panneaux d'avertissement et les recommandations du fabricant.
• Certains secteurs industriels et certaines entreprises limitent l'utilisation des appareils cellulaires. Respectez ces restrictions relatives aux équipements radio dans les dépôts de carburant, dans les usines de produits chimiques, ou dans les zones où des dynamitages sont en cours. Suivez les restrictions relatives à chaque type d'environnement où vous utiliserez l'appareil.
• Ne placez pas l'antenne en extérieur.
• Éteignez votre appareil sans fil dans les avions. L'utilisation d'appareils électroniques portables en avion est illégale: elle peut fortement perturber le fonctionnement de l'appareil et désactiver le réseau cellulaires. S'il ne respecte pas cette consigne, le responsable peut voir son accès aux services cellulaires suspendu ou interdit, peut être poursuivi en justice, ou les deux.
• Éteignez votre appareil sans fil à proximité des pompes à essence ou de diesel avant de remplir le réservoir de votre véhicule de carburant.
• Éteignez votre appareil sans fil dans les hôpitaux ou dans toutes les zones où des appareils médicaux sont susceptibles d'être utilisés.

The device is designed for and intended to be used in fixed and mobile applications. Fixed means the device is physically secured at one location and cannot be easily moved to another location. Mobile means the device is used in other than fixed locations.

ATTENTION: Maintenir une distance d'au moins 23 cm (9 po) entre l'antenne du récepteur et le corps de l'utilisateur ou à proximité de personnes. Le modem n'est pas conçu pour, ou destinés à être utilisés dans les applications portables, moins de 23 cm (9 po) du corps de l'utilisateur.

Radio frequency energy (RF) from cellular devices can interact with some electronic devices. This is electromagnetic interference (EMI). The FDA helped develop a detailed test method to measure EMI of implanted cardiac pacemakers and defibrillators from cellular devices. This test method is part of the Association for the Advancement of Medical Instrumentation (AAMI) standard. This standard allows manufacturers to ensure that cardiac pacemakers and defibrillators are safe from cellular device EMI.

The FDA continues to monitor cellular devices for interactions with other medical devices. If harmful interference occurs, the FDA will assess the interference and work to resolve the problem.

Precautions for Pacemaker Wearers

If EMI occurs, it could affect a pacemaker in one of three ways:

• Stop the pacemaker from delivering the stimulating pulses that regulate the heart's rhythm.
• Cause the pacemaker to deliver pulses irregularly.
• Cause the pacemaker to ignore the heart’s own rhythm and deliver pulses at a fixed rate.

Based on current research, cellular devices do not pose a significant health problem for most pacemaker wearers. However, people with pacemakers may want to take simple precautions to be sure that their device doesn't cause a problem.

• Keep the device on the opposite side of the body from the pacemaker to add extra distance between the pacemaker and the device.
• Avoid placing a turned-on device next to the pacemaker (for example, don’t carry the device in a shirt or jacket pocket directly over the pacemaker).

¹Radio performance may be affected by temperature extremes. This is normal.

²Device has been tested up to +85° C. UL Recognized @ 85° C.

• Radio performance may be affected by temperature extremes.
• Device has been tested up to +85° C. UL Recognized@ 85° C

• Radio performance may be affected by temperature extremes.
• Device has been tested up to +85° C. UL Recognized@ 85° C

• Radio performance may be affected by temperature extremes.
• Device has been tested up to +85° C. UL Recognized@ 85° C

¹mbed has limited USB support for the processor. Software controls routing to processor or directly to radio.

²The battery management circuit is designed for single cell Li‑Ion/Li‑Poly technology. Acceptability of the battery charge circuit for charging specific batteries/cells is to be determined in the end product.

³Radio performance may be affected by temperature extremes. This is normal.

⁴Device has been tested up to +85° C. UL Recognized @ 85° C.

MTQ-L1G2D-B02

Pin Minimum and Maximum Voltage

Pin Definitions

¹SPI pins are for cellular radio, not flash.

MTQ-L4G1-B02

¹A hyphen (-) indicates a range of acceptable logic levels.

²USB D+D-: 5V tolerant inputs / 3V drive-level output

MTQ-LNA7-B02

¹A hyphen (-) indicates a range of acceptable logic levels.

²USB D+D-: 5V tolerant inputs / 3V drive-level output

MTQ-LEU7-B02

¹A hyphen (-) indicates a range of acceptable logic levels.

²USB D+D-: 5V tolerant inputs / 3V drive-level output

MTQ‑LAT3‑B01

¹ A hyphen (-) indicates a range of acceptable logic levels.

² USB D+D−: 5V tolerant inputs / 3V drive‑level output

MTQ‑LAT3‑B02

¹For ‑B02 models only: Pins 14, 15, 16, and 27 are part of the SPI interface. These pins are inputs. If you do not use them, connect them externally to a high‑level signal (preferably through a high pull‑up resistor) to keep them from floating.

MTQ-MNG6-B02

Pin Minimum and Maximum Voltage

Pin Definitions

Use with:

Note: Diagram from the STMicro 32F411STM32F413RH datasheet.

The following table lists the processor pins and how the MTQ uses them.

To avoid enumeration or power issues if your device has a USB connector:

• Use a high-speed USB cable that is as short as possible.
• Use a well-shielded cable with at least 24 AWG wire pair for power/ground and 28 AWG wire pair for data lines.
• If possible, use a USB port that connects directly to the motherboard rather than a USB port with added cabling inside the computer chassis.
• Use USB 3.0 ports if available. These ports are typically rated for more current.
• The USB cable is available through MultiTech. The part number is CA-USB-A-MINI-B-3CA-USB-A-MICRO-B-3.

Install drivers on your computer before connecting the device.

The cellular radio's USB device driver is available on your model's page.

• Go to https://multitech.com/all-products/cellular/embedded-modems/multitech-socketmodem-mtq-iot-cellular-embedded-modem-and-system-on-module/https://www.multitech.com/brands/socketmodem-cell and click on your model. Download the driver from Downloads.
• The USB Driver Installation Guide (S000616) is included in the driver download and is also available under Manuals on your model's page.

Build applications written for the MTQ are built on top of the Arm^®Mbed™ library and can include the MTSAS library for easy cellular radio use.

The MTQ ships with AT pass‑through firmware, which directly connects the cellular radio to the external serial port on the MTUDK2‑ST‑CELL developer board. The firmware:

• Runs at 115200 baud by default to match with the cellular radio’s default baud rate.
• Prints debug messages from the debug port at 115200 baud.
• Allows users to increase or decrease the application’s baud rate by entering a plus (+) or minus (−) character on the USB debug port. Issuing a plus or minus character on the USB debug port changes the external serial port speed as well as the speed of the link between the processor and the radio. The speed of the USB debug port on reset is always 115200 to match the radio’s default regardless of the baud rate used at the time of reset.
• Uses RTS/CTS flow control on the serial connection to the radio and on the external serial connection. Enables RTS/CTS flow control on terminal emulators used with the AT pass‑through firmware.

MTSCellularInterface Library

The MTSCellularInterface software library on mbed provides a consistent interface to the cellular radio on each MTQ module. The interface includes:

• TCP sockets
• UDP sockets
• HTTP/HTTPS requests
• SMS messaging
• GPS if supported by the radio
• Access to common radio information like signal strength, registration, etc.

The library provides an easy‑to‑use API for interacting with the cellular radio. It identifies the radio and uses proper AT commands for that radio type, which allows the same application to run on multiple MTQ models with no software changes.

Arm Mbed is a free, open‑source platform and operating system for embedded devices using the Arm Cortex‑M microcontrollers. The platform includes a standards‑based C/C++ SDK, a microcontroller HDK, and supported development boards, an online compiler and online developer collaboration tools.

Programming the MTQ Microcontroller

With the MTQ and the MTUDK2‑ST‑CELL developer board, use the Arm Mbed ecosystem to program the microcontroller. Compile in the cloud or locally, copy the resulting binary file to the Mbed USB drive, and reset the MTQ.

All MTQ software is open source.

For information on the STM32F411xC/E microcontroller, refer to:

• Reference Manual: http://www.st.com/st-web-ui/static/active/en/resource/technical/document/reference_manual/DM00119316.pdf
• Datasheet: http://www.st.com/web/en/resource/technical/document/datasheet/DM00115249.pdf

For information on the STM32F413RH microcontroller, refer to:

• Reference Manual: https://www.st.com/content/ccc/resource/technical/document/reference_manual/group0/81/ea/88/1f/97/9e/4a/d0/DM00305666/files/DM00305666.pdf/jcr:content/translations/en.DM00305666.pdf
• Datasheet: https://www.st.com/resource/en/datasheet/stm32f413cg.pdf

The issues below have been identified with this device.

On LVW3 version 20.00.12 and LAT3 version 20.00.522 devices:

• A TCP file transfer in USB mode may drop the socket connection if sending as little as 60-62 KB of data. If this occurs, then try the following:
  • Re-open the socket
  • Resend the file

• The AT#SCFG command won't set sockets 4-6 with #sgact=2,1. The following commands will generate the error +CME ERROR: wrong mode.
  • AT#SCFG=4,3,300,240,600,50
  • AT#SCFG=5,3,300,240,600,50
  • AT#SCFG=6,3,300,240,600,50

On LVW3 version 20.00.12 devices:

• When using AT#PING+, the device will ping, but will not get a response back.
  • For example:
  • AT#PING="www.google.com",4,32,450
  • #PING: 01,"216.58.192.196",600,255
  • Warning:(1) IP(216.58.192.196) ReplyTime(600) 100ms Ping Timeout(450) 100ms
• The device will not send an SMS and this message appears: Error! SMS message time out (60) seconds waiting on +CMGS:".

MTQ-L4G1-B02, MTQ-LNA7-B02, and MTQ-LEU7-B02 (No Processor Models)

MTQ-LAT3-B01 (Processor Model)

MTQ-LAT3-B02 (No Processor Model)

MTQ-MNG6-B02 (No Processor Model)

Following are three options for communicating with the device.

• Install USB drivers and plug into the micro USB connector. No need for a host board.
• Access the device's USB interface via pins 6 and 7 of the 40-pin connector. Data pins 6 and 7 are in parallel with the micro USB connector on the device. There is no connection to pins 6 and 7 on the developer board.
• Establish serial communication using Multitech developer board MTUDK2. See the Developer Guide, Universal Developer Kit MTUDK2-ST-CELL.R1 (part number S000799) for more information.

Following are three options for communicating with the device.

• Install cellular radio USB drivers and plug into the micro USB connector. No need for a host board.
• Establish serial communication using MultiTech developer board MTUDK2. See the Developer Guide, Universal Developer Kit MTUDK2-ST-CELL.R1 (part number S000799) for more information.
• Install cellular radio USB drivers. Access the device's USB interface via pins 6 and 7 of the 40-pin connector. Data pins 6 and 7 are in parallel with the micro USB connector on the device. There is no connection to pins 6 and 7 on the developer board.

Configure the device before making a cellular data connection. Configuration changes are saved automatically.

Use a Packet Data Protocol (PDP) context to configure the device to use your carrier’s packet data services. Multiple PDP contexts are stored in an ordered list. Generally, a carrier approves only one PDP context in the list to configure and use for a data connection with their network.

To view the current PDP context list use the following AT command:

AT+CGDCONT?`

Example

AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 2,"IPV4V6","vzwadmin","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 3,"IPV4V6","vzwinternet","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 4,"IPV4V6","vzwapp","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 5,"IPV4V6","vzwclass6","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 6,"IPV4V6","vzwiotts","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0

OK`

Before configuring a PDP context use the following to stop the device from automatically connecting to the cellular network and registering:

AT+COPS=2

After configuring the PDP context(s) use the following to resume automatic connection and registration:

AT+COPS=0

The Access Point Name (APN) is a string in the PDP context that defines the network path for cellular data connectivity. The APN must match the carrier’s value provided with the SIM

Configuring Verizon APN

Verizon automatically pushes the necessary PDP context details, including the APN, to the device. If the APN is not pushed automatically, use the following AT commands to set the APN.

AT+COPS=2
AT+CGDCONT=1,"IPV4V6","<APN>"
AT+COPS=0

Verizon Example

AT+COPS=2
OK
AT+CGDCONT=1,"IPV4V6","mw01.vzwstatic"
OK
AT+COPS=0
OK

Configuring APN for AT&T and Other Networks

AT&T and other networks may not pushes PDP context details, including the APN, to the device. Use the following AT commands to set the APN.

AT+COPS=2
AT+CGDCONT=1,"IPV4V6","<APN>"
AT+COPS=0

AT&T Example

AT+COPS=2
OK
AT+CGDCONT=1,"IPV4V6","broadband"
OK
AT+COPS=0
OK

When configured with AT+COPS=0 the device automatically attempts to register with a carrier network. With the SIM and device properly configured and good reception network registration takes less than a minute. Otherwise, it may take more than 5 minutes.

To determine the device’s registration status, use one of the following three AT commands. If any return n,1 or n,5 then the device registered with the network automatically:

AT+CREG?
AT+CEREG?
AT+CGREG?

Return Values

• n,0 = Time-out or not searching
• n,1 = Registered
• n,2 = Searching
• n,3 = Carrier denied connection (contact carrier for guidance)
• n,5 = Registered, roaming

If the device has not registered with the network, wait a few minutes before issuing one of the AT+C*REG commands again.

Examples

AT+CREG?
+CREG: 0,1

OK
AT+CEREG?
+CEREG: 0,1

OK
AT+CGREG?
+CGREG: 0,1

OK

Once the device is configured and registered with the cellular network, activate a PDP context and conduct a ping test to ensure the device is sending and receiving data.

Activating a PDP Context

Before sending data, activate a carrier specific PDP context with the following.

AT#SGACT=1,1

Example

AT#SGACT=1,1
#SGACT: 100.72.154.34,38.0.16.20.176.134.63.233.0.0.0.0.187.242.184.1

OK

Conducting a Ping Test

After activating the PDP context, use AT#PING to verify network connectivity.

AT#PING="<Domain or IP Address>"

Example:

AT#PING="8.8.8.8"
#PING: 01,"8.8.8.8",0,114
#PING: 02,"8.8.8.8",0,114
#PING: 03,"8.8.8.8",1,114
#PING: 04_Cel,"8.8.8.8",2,114

OK

To properly power down your L4G1, LNA7, or LEU7 device, use the following sequence:

1. Issue the AT+QPOWD command or hold the reset line (pin 35) LOW.
2. Wait up to 65 seconds for POWERED DOWN message or until RADIO_VDD (pin 27) goes LOW.
3. Remove power to the MTQ.

To properly power down your L1G2D or MNG6 device, use the following sequence:

1. Issue the AT+SHDN command or hold the reset line (pin 35) LOW.
2. Wait for 30 seconds or until RADIO_VDD (pin 27) goes LOW.
3. Remove power to the MTQ.

The RESET pin takes care of properly powering up and powering down the cellular radio module.

Holding the RESET pin LOW for >50ms initiates a power up or power down sequence, depending on its previous state.

RESET Function on Initial Power Up

RESET Function when the Radio Module is Powered

MTQ-LAT3-B01 Devices

Reset the Processor

Pin 35 [RESET] on the 40-pin connector is connected to pin 7 [NRST] on the STM32F411RE processor which controls the N_RESET signal for the system.

To reset the processor, apply a reset pulse to N_RESET as follows:

• The minimum recommended reset pulse is 200 μs.
• The maximum reset pulse is 900 ms.

Reset the Radio

Pin 2 [PC13] on the STM32F411RE processor is connected to a tiny9 supervisory processor which controls the 3G_ONOFF signal to the radio.

To reset the radio, drive pin 2 low for:

• A minimum of 50 ms and
• A maximum of 1 second.

Power Down the Radio

MTQ-LAT3-B02 Devices

Pin 35 [RESET] on the 40-pin connector is connected to, and controls, the 3G_ONOFF signal which controls the radio.

MTQ-LAT3-B02 devices may be reset via software or hardware as follows:

Software Reset

To reboot the device, issue an AT#REBOOT command.

To initiate a soft reset, issue an ATZ command.

Hardware Reset

Control radio sleep mode with the GPIO pin PC13 (3G_ONOFF) on the onboard processor. See also 3G_ONOFF Signal.

• Setting PC13 to Low and holding it low turns the radio off, causing it to draw minimal power.
• Setting PC13 to High resets and wakes up the device.
• Refer to +CFUN in the AT Command Reference Guide for other sleep options.
  Note: If using +CFUN commands, then reset the device via the PC13 (3G_ONOFF) toggle low to high to bring the radio out of +CFUN sleep mode.

See Power Down the Device for the lowest power consumption.

• Refer to AT+QSCLK in the AT Command Reference Guide for details on sleep mode and other options.

The symbol shown below is on the product or on its packaging, which indicates that this product must not be disposed of with other waste. Instead, it is the user's responsibility to dispose of their waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment. The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more information about where you can drop off your waste equipment for recycling, contact your local city office, your household waste disposal service or where you purchased the product.

July, 2005

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

FCC Grant Part 22, 24, and 27

Single Modular Approval. Power listed is maximum conducted output power. Approval is limited to OEM installation only. Compliance of this device in all final host configurations is the responsibility of the Grantee. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20cm from all persons and must not transmit simultaneously with any other antenna or transmitter, except as evaluated in this filing or in accordance with FCC multi-transmitter product procedures. The antenna(s) used for this transmitter must not exceed a maximum gain of 4.0 dBi in 700/800/1700/1800 MHz. OEM integrators must be provided with antenna installation instructions and labeling requirements for finished products. OEM integrators and end-Users must be provided with transmitter operation conditions for satisfying RF exposure compliance. This grant is valid only when the device is sold to OEM integrators and the OEM integrators are instructed to ensure that the end user has no manual instructions to remove or install the device.

This device supports LTE of 1.4, 3, 5, 10, 15, and 20MHz bandwidth modes for FDD LTE Bands 2 and 4; LTE of 1.4, 3, 5, and 10MHz bandwidth modes for FDD LTE Bands 5 and 12; LTE of 5, and 10MHz bandwidth modes for FDD LTE Band 13.

This device contains functions that are not operational in U.S. Territories. This filing is only applicable for U.S. operations.

This Class B digital apparatus meets all requirements of the Canadian Interference‑Causing Equipment Regulations.

This device complies with Industry Canada license‑exempt RSS standard(s). The operation is permitted for the following two conditions:

1. The device may not cause interference, and
2. This device must accept any interference, including interference that may cause undesired operation of the device.

Cet appareil numérique de la classe B respecte toutes les exigences du Reglement Canadien sur le matériel brouilleur.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes:

1. L'appareil ne doit pas produire de brouillage, et
2. L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.

Notice: This equipment meets the applicable Industry Canada Terminal Equipment Technical Specifications. This is confirmed by the registration number. The abbreviation, IC, before the registration number signifies that registration was performed based on a Declaration of Conformity indicating that Industry Canada technical specifications were met. It does not imply that Industry Canada approved the equipment.

Notice: The REN assigned to each terminal equipment provides an indication of the maximum number of terminals allowed to be connected to a telephone interface. The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the Ringer Equivalence Numbers of all the devices does not exceed five.

The CE mark is affixed to this product to confirm compliance with the following European Community Directives:

• Council Directive 2011/65/EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment; and
• Council Directive 2014/53/EU on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity.

MultiTech declares that this device is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU. The declaration of conformity may be downloaded at https://multitech.com/product-support/.

For models designated for use in the UK, the following applies:

The UKCA mark is to confirm conformity with the relevant UKCA harmonization legislation:

MultiTech declares that this device is in compliance with the essential requirements and other relevant provisions of the above regulations. The UKCA Declaration of Conformity may be requested at https://multitech.com/product-support/.

This product complies with the requirements of the Regulatory Compliance Mark (RCM) for Electrical Regulatory Authorities Council (ERAC), Electrical Equipment Safety System (EESS), and the Australian Communications and Media Authority (ACMA) for Electromagnetic Compatibility (EMC).