EZB Connection

Before You Start (Beginner Checklist)

• Power the EZ-B with the correct battery/power supply.
• If using USB/Serial, plug the device into your PC and ensure the driver is installed (Windows Device Manager should show a COM port).
• If using Wi‑Fi/Network, make sure the EZ-B is on the same network as your PC (or is configured for a client connection).
• Know which connection slot you will use. Most ARC skills default to Connection Index 0.

Main Window

Settings - Scripts

1. Connection Established Scripts

When ARC connects on an index (0–4), the matching script runs. Common uses:

• Center or park servos to safe positions
• Set LED states (on/off, colors)
• Initialize variables your project expects
• Start other scripts (for example, sensor polling loops)

Servo initialization is a very common first step—read more here.

Beginner safety tip: If your robot has arms/wheels, initialize to a safe position first to avoid sudden movement when the connection comes online.

Settings - Battery Monitor

Settings - TCP Server

1. Enable TCP Shell Server Checkbox

When enabled, ARC runs an EZ-Script “shell” server that accepts TCP (Telnet-style) connections. Connected clients can send EZ-Script commands (set variables, start/stop scripts, control servos, etc.) and receive responses.

• Monitor connected clients with the TCP Clients skill.
• Common integration example: RoboRealm.
• For advanced integrations, combine with the HTTP Server to access features such as video frames.

Python example: Connect to TCP Server #0 on localhost port 6666 and speak from the connected EZB speaker.

import socket

# ARC TCP Server IP
server_ip = '127.0.0.1'

# ARC TCP Server Port
server_port = 6666

# The EZScript command to send to ARC. This example will speak out of the connected EZB
command = "SayEZB(\"I am connected\")\n"

# Create a socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
    # Connect to the server
    sock.connect((server_ip, server_port))

    # When first connecting to the ARC TCP Server, it prints version info before a command can be sent
    version = b''
    while True:
        data = sock.recv(1024)
        if not data:
            break
        version += data
        if b'\n' in data:
            break
    print("Version:", version.decode())

    # Send the command to ARC
    sock.sendall(command.encode())

    # Receive and print the response
    response = b''
    while True:
        data = sock.recv(1024)
        if not data:
            break
        response += data
        if b'\n' in data:
            break
    print("Received response:", response.decode())

finally:
    sock.close()

2. TCP Port Adjustment

Choose a unique TCP port from 1025–65535. Leave it at the default unless you have a port conflict or you are running multiple servers.

3. EZ-B Connection Server Checkbox

Enables ARC to listen as a server for an EZ-B connecting into ARC (typically on index 0). If your EZ-B is configured in “client” mode (it connects to ARC), this must be enabled.

Settings - COM/USB Connection

Settings - IO Timing