40-Pin EtherStem Module

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BrainStem EtherStem $79.00 microcontroller cross platform TCP/IP general purpose embedded I/O module
  • $65.00 (USD)
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  • The 40-pin EtherStem module is a general purpose embedded I/O module with a TCP/IP based ethernet interface.

  • Manufactured By - Acroname Inc.



  • TCP/IP ethernet interface
  • 3 analog to digital inputs at 12-bit resolution
  • 1 digital to analog output at 12-bit resolution
  • 15 general purpose digital inputs/outputs
  • I2C FM+ (1 Mbit/s) support
  • User, link, power and heartbeat LEDs
  • 2 UART serial ports
  • uSD slot for additional storage
  • Bridge from TCP/IP 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 40-pin EtherStem Module has a BrainStem 2.0 kernel (internal OS) allowing it to operate as a slave device and run reflexive actions simultaneously.  A 40-pin BrainStem module can be networked with other BrainStem 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.

Product Assets

Name Notes File
S45-ETHERSTEM-1_datasheet.pdf Datasheet Download