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Swarm M138 Modem

  • Transmits and receives 2-way data via Swarm’s satellite network.
  • Designed to be embedded into a third-party IoT device.
  • Data delivered via a REST API or Webhook to any cloud service.

Learn more about the Swarm Data Plan


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Dimensions51.0 x 30.0 x 5.3 mm
Mass9.6 g
ComponentsGPS, VHF radio with integrated T/R switch
U.FL connectors for GPS and VHF antennas
ARM Cortex-M4 processor
Indicator LEDs
CMOS serial UART interface
SensorsOnboard GPS (lat/lon/alt)
PowerSleep mode: 3.3 V, 80 uA (max)
Receive mode: 3.3 V, 26 mA (typ), 40 mA (max)
Transmit mode: 3.3V, 850 ma (typ), 1000 mA (max)
EnvironmentOperational: -40 C to +85 C
Storage: -40 C to +85 C
Module protocolData sent to the Modem should be formatted into a hex-ascii string.
Two-letter NMEA-like commands are sent to a 3.3V CMOS serial UART.
Data rate1 kbps
Frequency137-138 MHz (downlink)
148-150 MHz (uplink)


When will the Swarm M138 Modem be available?

We currently estimate early 2022. You can enter your email above to receive updates on availability.

How and when do I pay?

You will pay for devices by submitting a pre-order (click Buy Now above). You will receive a notification in advance of shipment. An annual Swarm data plan ($60/yr) is required to transmit and will be billed to the same payment method upon activation of your device(s).

When is the activation date for my device(s)?

A device’s Activation Date is the first of the month following when ≥50 messages are sent. For example, if you send the first ≥50 messages on Feb 17th, the Activation Date will be March 1st and your data plan will annually renew each March 1st. Please see Terms & Conditions for further details.

Will the pricing go up after the Swarm M138 Modem becomes available?

The discounts shown online are available through Mar. 31, 2022.

Can I still purchase the previous Swarm Tile?

Swarm is no longer selling Swarm Tile modems. We have instead decided to focus on the development and production of the Swarm M138 Modem.

What if I’m interested but I’m not ready to pre-order?

No problem! Enter your email above and we’ll notify you when the Swarm M138 Modem becomes available.