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Iridium Small & Lightweight SBD & GPS tracker
The Iridium Small & Lightweight SBD & GPS modem (Iridium SL) is the smallest self contained Iridium tracker in the world!
It can transmit your location from anywhere in the world and is built on the latest satellite, antenna, and electronics technology to track and monitor in real time!
The Iridium Small & Lightweight SBD & GPS modem (Iridium SL) is the smallest self contained Iridium tracker in the world!

It can transmit your location from anywhere in the world and is built on the latest satellite, antenna, and electronics technology to track and monitor in real time!

Military  Model  >>>

The Iridium SL SBD can be used
in maritime, aircraft, personnel, and vehicles, and is ideal for applications such as: security and safety, fleet management, oil and drilling, soldier tracking, and secure government applications.

Anything that has value that moves and needs to be monitored. 

Truly Global Operation
By utilizing the Iridium network, the Iridium SL can track an asset anywhere on earth.
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Iridium has 66 satellites in orbit around the Earth, allowing coverage anywhere on Earth 24 hours a day, 7 days a week. The Iridium SL works with any asset to send information to the Online Tracking Platform (OTP) and provide you with live, up-to-date tracking information.


  • 32 bit ARM processor with a fully user customizable LUA scripting language
  • Internal dimensions 1.77 x 1.77 x 1.34 inches (45 x 45 x 34mm), including battery, modem & antenna
  • SiRFstarIV GPS with an amazing -163dBm sensitivity
  • AES 256-bit encryption
  • Built in 2.5Ah Lithium Polymer battery & charger
  • Accelerometer and Magnetic Compass
  • Battery Fuel Gauge
  • Integrated high gain ceramic antenna dual tuned for Iridium and GPS
  • Over the air configuration of the terminal
  • Truely global coverage with the Iridium satellite network
  • OEM options available
Track Anything Anywhere In The World!
 iridium_earth_connect.jpg            Iridium_qualityemblem.jpg     iridium_satellite_blue.jpg
  • Fleet Management Container Tracking Vessel Tracking Security Services
  • Government Tracking with Encryption
  • Fuel Monitoring and Logistics
  • Soldier Tracking
  • Electronic Driver Log Compliance
OTP - GPS Tracking & Asset Management
OTP is a web based integrated Iridium, Inmarsat and GSM tracking solution. It's compatible with modern web browsers and works on a multilingual platform that brings together all the positions of every manufactured product under one location and displays and manages them in a single unified interface.
With OTP , asset locations and movements - including position, speed, altitude and heading - are tracked in real-time worldwide via GPS updates. It's never been so easy to track your personnel, vehicle or assets, where ever they may are!
  • Integrated GSM And Satellite Tracking In One Solution
  • Superior GPS Tracking & Mapping
  • No special hardware or software is required
  • Seamless software and firmware updates
  • Reliably tracks personnel, equipment or vehicles, anywhere in the world
  • DC Power (4.5V to 40V DC) @ 1A max
  • USB Interface
  • RS232 Interface
  • 2 Relay Outputs @ 2A
  • 2 Analog Inputs (0V to 30V DC)
  • (optional) SMA connector for external antenna

  • Channels: 48
  • Correlators: ~ 400,000
  • Frequency: LI 1,575 MHz
  • Sensitivity: Tracking: - 163 dBm,Navigation: - 160 dBm,Aquisition (cold start): - 148 dBm
  • Position Accuracy: < 2.5 m CEP (autonomous), < 2.0 m CEP SBAS (horizontal)
  • Time To First Fix: Hot Start: < 1s, Warm Start: < 32s, Cold Start: < 35s
  • UART - NMEA (Default)
  • NMEA message Switchable: GGA, RMC, GSA, GSV, VTG, GLL, ZDA
  • Baud rate Switchable: 4,800 (default), 1,200 to 115.2k
  • Ports: Tx (NMEA output) , Rx (NMEA input)

UART - SiRF Specific SSB/OS
  • SiRFbinary protocol: Protocol for SiRFstar product family up to SSIII
  • Open Socket Protocol: Protocol extension for SiRFstarIV
  • Baud rate Switchable: 57.6k (default) , 1,200 to 115.2k
  • SiRFstarIV GPS with an amazing -163dBm sensitivity

What does to the power of scripting for you?


  • Behavior monitoring and transmission using accelerometer
  • External interfaces to additional equipment
  • Data logging and queued transmissions
  • Lone worker monitoring and lack of movement monitoring
  • Customized control of LED's
  • Customized software applications over Bluetooth
  • Custom message formats and full protocol control
  • Geofencing behavior and alarm management

Add user configuration and scripting capabilities to your projects, making them adaptable to the always changing contexts of industrial processes, evolving engineering, automation standards, and field optimizations.

Script portability:
As the platform and network capabilities continually change and new hardware is released, your scripting remains the same. A variety of products will use the same script as they become available.

Shorter TTM:
Optimizes Time to Market, shorter time to revenue, and improved ability to hit critical market windows.

Know How:  

Terminal behaviour:
The front interface panel has two buttons and two lights. There is a button for Power, one button for Check In, and if you press both at the same time, SOS. There is also a blue light indicating PWR for Power and MSG which is a status light.
When you depress the Power button for more than 1 second, the unit will either turn off if it is currently on and go into a deep sleep without transmitting, or if it is currently sleeping, will wake the unit and immediately transmit a position.
When you depress the Check In button WHILE the unit is on, the next successful transmission report will contain a bit flag indicating that it is a Check In message. This mode will be cleared once a successful transmission is made. The MSG light will begin flashing slowly. This button will NOT work if the unit is not powered on (Power light on or flashing)
When you depress the Power + Check In button together for SOS mode, the unit will IMMEDIATELY begin transmitting it's current location even if it was sleeping. The MSG light will begin flashing rapidly. The unit will also use change the sleep interval to the value specified by "sos_sleep" time in seconds indicated in the "settings" function below. To exit SOS mode, depress the Power + Check In button together again and the MSG light will turn off again.
While the unit is powered on, it will go through progressive stages of acquiring, transmitting, and sleeping, as indicated by the Power and Message LED's. 1) Upon power up or wakeup from sleep, the Power led will begin flashing slowly. This indicates that the unit is waiting for a GPS fix. 2) Once the unit has a GPS fix, the Power led will begin flashing at a medium speed. This indicates that the unit is waiting for Iridium signal. 3) Once the unit has found the Iridium satellite, the Power led will begin flashing very fast. This indicates that the unit is transmitting to the Iridium network. 4) Once the unit has either successfully transmitted OR has failed at any of these stages, the Power led will turn solid, and the Message led will indicate the last step before sleeping.


Lua functions:
These options can be sent to the terminal via the "Send Command" function within the tracking platform, or entered through the RS232 serial connection, or the USB cable via CDC mode.


Settings functions:

//Set variable into flash
settings.flash( {setting name}, {value} )
//Read variable from flash
{variable} = settings.flash( {setting name} )
setting name:
sleep //Seconds to sleep when in NORMAL mode
sos_sleep //Seconds to sleep when in SOS mode
g_timeout //GPS Timeout in seconds, default 120
g_hdop //GPS Horizontal Dilution of Precision in centimeters, default 300
i_tx_timeout //Iridium transmit timeout, default 60
i_signal_timeout //Iridium signal timeout, default 60
i_tx_retries //Iridium transmit attempts, default 3
sleep_w_power //Set to 1 to sleep when powered, default 0

//Set sleep time between reports to 5 minutes
settings.flash(settings.sleep, 600)
//Print current sleep time

Battery functions:

//Battery percentage integer value from 0 to 100
//Battery voltage (voltage * 100) IE: 400 = 4.0V



//Set LED
led.led( {led number}, {led mode}, {cycles} )
//Read current LED mode
{variable} = led.led( {led number} )

led number:
0: external LED green
1: external LED blue
2: internal LED green
3: internal LED blue

led mode:
Cycles:   The number of times to repeat the mode sequence. 255 = forever
//Set LED 0 to ON permanently  led.led(0, 1, 255)

Pinout v.1

  • RS232 - TX
  • RS232 - RX
  • USB - V+ (4.5-5.5v DC)
  • USB - D-
  • USB - D+
  • OUTPUT: 0
  • OUTPUT: 1
  • INPUT: 0
  • INPUT: 1
  • VCC (7.5v-40v DC)


LED modes

Blue                      Description
Slow Flash           Waiting for GPS
Medium Flash     Waiting for Iridium
Fast Flash            Transmitting to Iridium
Solid - MSG led:  Slow Flash    Going to sleep, Failed to get GPS
Solid - MSG led:  Medium Flash    Going to sleep, Failed to find Iridium
Solid - MSG led:  Fast Flash    Going to sleep, Failed to transmit to Iridium
Solid - MSG led:  Solid  Going to sleep, Successful transmission

Green                    Description
Off                          In normal mode, no SOS, no Check In
Slow Flash           Check In mode, will set bit on this transmission
Fast Flash            SOS mode, will stay in SOS mode until Power+Check In buttons                                 are depressed


COCOM Limits:
COCOM limits are a GPS limitation by international law to disable GPS chipsets at high altitudes or high speeds.

The SL sbd modem will stop reporting if the unit exceeds 1,000 knots AND exceeds 18,000 meters. Both of these limits must be exceeded for COCOM limits to be enabled which will disable the internal GPS receiver until one of the two limits returns to normal.

CoCom is an acronym for Coordinating Committee for Multilateral Export Controls.
CoCom had 17 member states: Australia, Belgium, Canada, Denmark, France, Germany, Greece, Italy, Japan, Luxembourg, Netherlands, Norway, Portugal, Spain, Turkey, the United Kingdom and the United States.
In addition there were a number of cooperating countries, such as Austria, Finland, Ireland, New Zealand, Sweden and Switzerland.
Laws and regulations:   In the United States, CoCom compliance was implemented in the 1960s via the Arms Export Control Act (AECA) and the State Department's regulatory supervision on AECA via International Traffic in Arms Regulations (ITAR), which are still in effect.

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