Larger Message Payloads

Browse satellite messaging hardware for applications that need to send and receive more than small telemetry packets, without moving to a full IP connection.

 

This collection currently focuses on Iridium Messaging Transport, or IMT. IMT devices support two way message-based payloads from 25 bytes to 100 KB, making them a good fit for batched sensor data, logs, configuration files, richer diagnostics, image snippets, and other payloads that are awkward to fit into low data SBD messages.

 

As a rule of thumb, larger message payload devices are usually a good fit for deployments sending around 10-55 KB per month. If you expect to send much more than that, or you need TCP/IP, Ethernet-connected equipment, remote access, or continuous data sessions, look at RockREMOTE and other Certus 100 hardware instead.

  • RockBLOCK 9704

    From $279.00
    From $279.00

    Iridium IMT module for two way satellite messages up to 100 KB, with USB-C, UART, and Cloudloop self-serve airtime.

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  • RockBLOCK Plus 9704

    From $479.00
    From $479.00

    Field-ready RockBLOCK 9704 for remote equipment that needs IMT payloads up to 100 KB, integrated GNSS, RS-232, and IP67 sealing.

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  • RockBLOCK Pro

    From $770.00
    From $770.00

    Send larger satellite messages without managing the modem workflow yourself. RockBLOCK Pro handles IMT payloads up to 100 KB, queuing, retries, GNSS, and configurable I/O.

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  • RockBLOCK Pro OEM

    $600.00
    $600.00

    Board-level RockBLOCK Pro for custom products that need Iridium IMT messages up to 100 KB, onboard queueing and retries, Cloudloop device management, and RS232 or RS485 integration.

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  • Iridium Certus 9704 Developer Kit

    Evaluation kit for testing the Iridium Certus 9704 transceiver and IMT messages up to 100 KB. Use it for bench and field validation before moving to production hardware.

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Frequently Asked questions

Choose RockBLOCK 9704 if you want the smallest board level route into Iridium IMT and are building the enclosure, power design, host interface, and application logic yourself.

Choose RockBLOCK Plus 9704 if you want a sealed IMT device with integrated GNSS and RS-232 for field deployment.

Choose RockBLOCK Pro if you want a finished outdoor device with onboard queueing, retries, GNSS, configurable I/O, BLE, and serial integration.

Choose RockBLOCK Pro OEM if you want the RockBLOCK Pro capability as a PCB assembly inside your own product or enclosure.

Choose larger message payload hardware when your payloads are too big or too awkward for low data SBD messages.

Good examples include grouped sensor readings, event logs, firmware or configuration updates, diagnostic bundles, compressed files, or image snippets. If your application only sends compact telemetry, alerts, status updates, position reports, or short commands, low data messaging may still be the better fit.

Larger message payloads are for applications that need to send more than compact telemetry, alerts, position reports, or short commands, but don't need a full IP connection.

As a rule of thumb, this category is a good fit for deployments sending roughly 10-55 KB per month. Typical payloads include batched sensor readings, logs, configuration files, richer diagnostics, image snippets, or compressed data from remote systems.

This collection currently focuses on Iridium Messaging Transport, or IMT, with devices that support message-based satellite payloads up to 100 KB. That includes RockBLOCK 9704, RockBLOCK Plus 9704, RockBLOCK Pro, and RockBLOCK Pro OEM.

These are message-based devices, not satellite IP terminals. They send and receive defined payloads rather than opening a general IP connection. If your application needs TCP/IP, VPNs, remote access, Ethernet-connected equipment, or continuous data sessions, look at RockREMOTE and other Certus 100 hardware instead.