Asked — Edited
Resolved Resolved by thetechguru!

Ez-B V3 Connection

I just pulled out my old V3 all lights flashing the bluetooth pairs perfectly but the problem is with the new version seems to only support v4 internet connection is there anyway with the new software to connect to bluetooth? i've searched all around but found nothing. Please help!


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In the connection dialog, just replace the IP address with the com port (ie com3) that was assigned to the EZ-B when you paired it.

V3 is still currently supported in ARC, although not sure for how much longer and of course some features don't work.

EZ-Robot is running a buy back program where you can trade it in for store credit towards a v4 or any of their other products. See



The learn section on the website is where manual and help information is located. There is a subsection on the menu bar for the v3 in the learn section. Here is a direct link:

Have fun with that old board :)


Thanks for the fast reply but when i did that thetechguru the only port that would work was COM1 but it said this Attempting connection on COM1 Comm Err: The operation has timed out. BbytesToExpect: 1 Received: Disconnected Connection Failed: System.Exception: Controller Not Responding at EZ_B.EZB.sv4ke398H2() at EZ_B.EZB.Connect(String hostname, Int32 baudRate) Disconnected red light on the bluetooth is flashing blue light on the top left flashing all seems well got 3 big servos one small but no connection on the ARC


This is an old video relevant only to the v3, but it should help.


I followed the video and re paired it, it said COM14 Console: Attempting connection on COM14 Connection Failed: System.IO.IOException: The network location cannot be reached. For information about network troubleshooting, see Windows Help.

at System.IO.Ports.InternalResources.WinIOError(Int32 errorCode, String str) at System.IO.Ports.SerialStream..ctor(String portName, Int32 baudRate, Parity parity, Int32 dataBits, StopBits stopBits, Int32 readTimeout, Int32 writeTimeout, Handshake handshake, Boolean dtrEnable, Boolean rtsEnable, Boolean discardNull, Byte parityReplace) at System.IO.Ports.SerialPort.Open() at EZ_B.EZB.Connect(String hostname, Int32 baudRate) Disconnected

"@Dj Sures"


Put here exactly what you are putting in the connection box.


When you paired the EZ-B, it usually creates 2 com ports, not one. If Windows shows you which one is outbound and which one is inbound, use the outbound one. If it doesn't specify (depends on your bluetooth stack), try the second one created, it is usually correct.

You could also try the V3 Firmware Update app and see if it will connect and update the firmware. If you haven't used it in a very long time, the firmware may be so old that ARC can't even recognize it well enough to tell you that it needs a firmware update. You certainly will need the update to use anyway, so this is a good first step.



@mazehorizontech I goto control panel > devices and printers find my bluetooth dongel go to bluetooth settings then COM Ports click add click outgoing click browse choose the ezrobot press ok find the com port press apply launch ARC goto connections and type in COM#


@thetechguru ARC recently downloaded - Where do i find the second com port


Updated to the latest firmware and boom we are back in business.

Thanks All


Whoop! Great to hear. It's good to see the old v3 still getting some attention.


Thanks guys my sons really enjoying the old v3

May have to upgrade

Here's his first build User-inserted image

User-inserted image