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Loco.Engineering DCC/WCC Train Sound/Multifunction Decoder

Wireless DCC train/multifunction decoder

Getting Started

The steps below apply to Loco.Engineering decoders and custom decoders using SimpleDCC/WCC firmware, which you can download from our GitHub repository.

  • Install the decoder inside your train. For fast evaluation, you can use the included tool for firmware uploading.
  • Power the decoder by either powering the track (decoders work with DCC, DC, and AC) or connecting a USB-C cable to the firmware tool. The voltage range is 5V - 19V.
  • Open the WiFi network list on a mobile device, laptop, or tablet and connect to the "locoxxxxx" network, where "xxxxx" is the serial number located on the bottom of the decoder.
  • After connecting to the decoder’s WiFi, open a browser and navigate to http://loco.local or http://192.168.4.1 to access the web app, where you can configure and control the decoder. Note: While connected to the decoder’s WiFi, your device won’t have internet access.
  • In the web app, click on “New state” to create a new state, or click on an existing state to edit it (e.g., to change the DCC address). A "state" represents a signal or condition that activates an element connected to the decoder when a DCC packet or WCC message is received.

Control model trains over WiFi - Web App Screenshot

Each time you click "Save," the decoder settings are uploaded, allowing you to test new states immediately after saving them. - (Optional) Send a DCC packet from the command station to test if the state is activated when a DCC packet is received. - That’s it! You can now add more states and control the decoder via DCC, WCC, or the web app.

Loco.Engineering Train Decoder Specifications

  • Dimensions: 29mm x 13mm x 4mm
  • Compatible with DCC (Digital Command Control), WCC (Wireless Command Control), and DC (Direct Current or Analog Control). Mfx support is coming soon.
  • Functions as a train, multi-function, sound, and accessory decoder.
  • Speed steps: 28-128
  • Supports multiple DCC addresses on a single decoder.
  • Compatible with functions 1-28.
  • Max motor current: 1.5A
  • Audio: 2W, 8Ω
  • Function/Light current: 2 outputs up to 100mA/output, 2 outputs up to 40mA/output
  • Flash memory for sounds: 2MB
  • RAM: 2MB
  • Operating voltage: 5V - 19V
  • Back EMF and motor current sensing.
  • 3.3V and 5V outputs.
  • Connect up to 4 servo motors, with a total current limit of 400mA.
  • GPIOs for external sensors, drivers, and components over I2C, SPI, or UART.
  • Audio files can be uploaded via a web browser without additional tools.
  • RGB status LED for simplified decoder testing.
  • Can be battery-powered (with an additional battery management board).
  • Decoder CVs and logic can be updated via a mobile phone, tablet, or laptop web browser with WiFi/Bluetooth connectivity, bypassing command stations.
  • Over-the-air updates with new features twice a month.
  • Fully programmable with Arduino or ESP-IDF.

What You Can Control/Create with the Loco.Engineering Train Decoder

  • Operate model trains and other movable components using DC/DCC or WCC with a voltage range of 5-19V.
  • Control battery-powered trains, such as LEGO® models (requires an additional battery management board).
  • Directly control up to 4 servo motors without additional boards.
  • Operate turnouts and other layout elements using bi-directional solenoids (typically with 2-wire setups).
  • Integrate NFC readers to detect when specific trains arrive at designated locations.
  • Connect sensors using I2C, SPI, or UART communication interfaces.
  • Develop custom remote controllers or boards to manage the layout.
  • Write and upload your own firmware and applications.

Decoder Schematic

Custom Firmware/Code

Follow the instructions for building and uploading custom firmware in our GitHub repository.

Train Decoder Versions

  • Bare decoder without wires and connectors – Can be connected to virtually any train, but soldering is required.
  • Decoder with wires – Can be connected to virtually any train without soldering if the motor and lights in your train already have wires. Check tips on how to connect wires without soldering: YouTube Tutorial.
  • Decoder with NEM 652 (8-pin) interface
  • Decoder with 21MTC interface

Where to Buy?

You can order Loco.Engineering train decoders exclusively from our online shop.

Questions?

Contact us at hey@loco.engineering