EtherStem 1.0 Module

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BrainStem EtherStem $79.00 microcontroller cross platform TCP/IP general purpose embedded I/O module
  • $99.00 (USD)
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  • The EtherStem 1.0 is a general purpose embedded I/O module with a TCP/IP based ethernet interface.

  • Manufactured By - Acroname Inc.


Development Stage

The EtherStem is under active development and testing at this time. If you are interested in participating in the beta development, please contact Acroname for more information.


  • TCP/IP ethernet interface
  • 3 analog inputs at 12-bit resolution
  • 10 general purpose digital inputs/outputs
  • I2C Fast Mode Plus (1Mbps) support
  • User, Link, Power and Heartbeat LEDs
  • 2 UART serial ports
  • uSD slot for additional storage
  • Bridge from USB to I2C bus transactions
  • Realtime clock
  • Bulk capture mode for analog inputs
  • Small footprint (50.8mm x 30.48mm x 14.03mm)

Software Development

The EtherStem has a BrainStemâ„¢ 2.0 kernel (internal OS) allowing it to operate as a slave device and run reflexive actions simultaneously.  EtherStems can be networked with other BrainStemâ„¢ modules across the I2C bus at speeds up to 1Mbps.

A cross platform C++ API is available for high level software development using a TCP/IP socket interface.

Acroname is actively developing BrainStem 2.0 software and firmware for prime time.  Please check the Acroname Download page often for updates.