Water Linked M64 Acoustic Modem


The Modem M64 is a two-way half-duplex 64bps acoustic modem for wireless underwater communication with 200 meter (660 foot) range and user configurable data link. With a well-documented communication interface and Python library, it’s well suited for use on AUVs, remote sensors, and autonomous vehicles.

Delivery time: 10 - 14 business days

SKU: WL-11003-1 Category:


The Water Linked M64 Acoustic Modem is a two-way half-duplex 64 bps underwater acoustic modem with a robust and user configurable data link, enabling wireless underwater communication. The operating principles can be found on the Water Linked website: Underwater Communication.

The M64 sets a new market standard with its record-breaking physical size, low power requirements, and cost. All this combined with a very useful technical specification and Python library, the M64 opens new possibilities for underwater communication in both existing and new areas.

The Modem M64 has the following key specifications:

  • Two-way communication
  • 64 bit per second net data link, both ways
  • Typical latency ~500ms
  • 200 meter range

Typical Applications:

  • AUV telemetry
  • ROV wireless control
  • Autonomous vehicle research
  • Wireless subsea sensors
  • Research projects
  • Any scenario where you need to wirelessly control and monitor subsea equipment

Key Features:

  • Omnidirectional operation which will keep the data link stable even when the modem is in motion and/or being rotated around its axes.
  • Fully self-contained with no requirements for external computers, top-side controllers or other devices.
  • Packet based protocol with extensive use of error detection to enable a highly robust transmission.
  • The integrated status LED makes it easy to confirm that the communication link is established and when data is transferred.
  • Serial 115200 baud UART 3.3V interface makes the M64 easy to integrate with other subsea equipment like sensors, ROVs, and AUVs.
  • Easy to use API to transmit/receive packages etc.
  • Can be used in a setup where one modem transmits and receives while many other modems receives.
  • Can operate simultaneous with Underwater GPS.
  • Extremely small size enabling easy integration in other equipment.
  • Very low power consumption.
  • Highly robust operation, also in areas with acoustic reflections (shallow water, around installations etc.)

Additional information

Weight 0,5 kg
Dimensions 8 × 8 × 1 cm