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Swarm M138 Modem

$89.00 until June 30, 2022

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.

An annual Swarm data plan is required to transmit and will be billed to the same payment method upon activation of your device(s)

Enter quantity in increments of 25


QuantityPrice (USD) - discounted until March 31, 2022
25$119 $89 + $60/yr data
100$109 $79 + $60/yr data
1000$99 $69 + $60/yr data
10000$89 $59 + $60/yr data


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)

Visit our FAQ page for more information