WSK10 Getting Started

WCM20 Device Overview

The WCM20 is a versatile Wi-SUN field device that operates as both a collector and mesh extender within the network. As a collector, it is used to control and collect data from directly connected devices and sensors. It also enables reliable communication relaying messages across the mesh, helping to extend coverage and improve overall network resilience.

Designed for flexible deployment in evaluation and real-world scenarios, the WCM20 supports scalable, multi-hop connectivity, making it an essential component for building and testing robust Wi-SUN networks.

Quick Assembly

To assemble the WCM20 in the WSK10 evaluation kit, follow these steps:

1. Prepare the Components

Open the kit and identify the preassembled board, USB cable, button, LED, and antenna.

2. Install the Button

Remove the insulation from the end of the button’s wires.
Using a flathead screwdriver, loosen the screws for pins one and two.
Insert the button wires directly into pins one and two, ensuring the cables are straight and not twisted.
Tighten the screws and give the wires a gentle tug to ensure they are secure.

3. Install the LED

Identify the black and red LED wires.
Fold the exposed wire leads in half if they are too long to ensure a clean insertion point with no exposed wire.
Insert the black wire first, followed by the red wire, into the appropriate block connector pins.
Tighten the screws and confirm the connection is secure.

4. Attach the Antenna

Screw the antenna onto the designated section of the board until it is set.

5. Connect Power

Connect the USB-C end of the provided cable to the port on the board.
Plug the USB-A end into a power source, such as a PC outlet or a USB port on a BRD41.
Note: The WCM20 can be powered from a 12-24V DC source, using the screw terminals next to the USB connector. When using external power, do not attach the LED.

LED Patterns

A red power LED, located between the USB-C and power connectors, illuminates when power is applied.
Upon startup, all three status LEDs briefly turn on as part of the initialization process.
During normal operation, the status LEDs, one for each color, provide visual indication of system status and events.

Status LED Color	State	Meaning
Red	On	RS-485 data write
Green	Slow blink	Joining Wi-SUN Network
Green	Solid ON	Wi-SUN Connected
Orange	Solid ON	NMS Connected
Orange	Flash (and back to Solid)	On data TX/RX on UDP

I/O Connection Electrical Ratings

Output (OUT) Pins: Capable of driving a 12–24 V relay with up to 50 mA current. The output switching voltage is determined by the WCM20 power supply.
Input (IN) Pins: Configured as normally open; the firmware detects when pins are shorted together. The IN– pin is directly connected to ground (GND).
RS485 Port: Supports half-duplex communication at 9600 baud, 8N1. Commonly used to enable Wi-SUN connectivity on legacy devices. For guidance on integrating with specific field applications, please contact MMB Networks.