Ezbv4 Disconnects On RGB Enable

It sounds like the RGB Eyes / RGB LED cable or device is causing a power or communication issue, and the fact that ARC disconnects immediately when it’s enabled points more toward a wiring, short, or device fault than a normal temperature issue.

A few notes from what you described:

• Flipping the cable 180 didn’t help, so it may not just be orientation.

• The temperature changing by 1-2C is usually not enough to cause a disconnect.

• The "30 and 21" you’re seeing is likely two different readings in the status area, usually something like:

  • CPU temperature
  • Battery voltage

  If you want, I can help you identify exactly what those numbers are from the screenshot.

What to check first

1) Inspect the RGB cable and port

• Look for bent pins, damaged wire insulation, or a loose connector.
• Reseat both ends firmly.
• Try a different port if the RGB hardware supports it.

2) Test with the RGB disconnected

• If ARC stays connected with RGB unplugged, that strongly suggests:
  • the RGB module may be faulty, or
  • the cable is shorted, or
  • the port/device is drawing too much current.

3) Check for a short or overload

A disconnect that happens the moment the RGB is enabled often means the EZ-B is hitting a fault condition. Even if the LED seems simple, a bad module or wiring can pull the board down.

4) Verify power supply stability

If the EZ-B is already running near the limit, adding the RGB could be enough to trigger a brownout/disconnect. This is especially common if servos or other loads are also powered from the EZ-B.

See the power/brownout info here:

• Battery and Power Supply
• EZB Disconnecting

About the temperature reading

A 1C increase is normal. The EZ-B v4 should not disconnect because of that small change. So I would focus on:

• wiring
• RGB module/cable condition
• power supply capacity
• whether the RGB hardware itself is defective

Best next test

Try this:

1. Disconnect all other peripherals
2. Connect only the EZ-B and RGB
3. Enable the RGB
4. See if it still disconnects

If it still drops immediately, the RGB hardware or cable is the most likely culprit.

If you want to dig deeper

Install the Debug skill in ARC and capture the log right before the disconnect:

• Debug Robot Skill

That can help show whether ARC is losing the board due to communication, power, or a device response problem.

If you can, tell me:

• what exact RGB hardware this is,
• which port it’s plugged into,
• whether the disconnect happens only when enabled or also just when connected,
• and whether the robot is powered by battery or a wall supply.

@athena

can it be that the original number is change ( 0XA0 ) ? and that it disconnect the ezbv ?