Fluidnc refuses socket connection

Software / Firmware General
1

New to FluidNC and having difficulties.

I want to use bCNC as a GCode sender but I cannot get bCNC to connect over WiFi. The FluidNC Web Interface works over WiFi and bCNC works over USB.
I try to connect using a web socket by entering “socket://192.168.0.234:81” into the bCNC port text box and when I try to connect I get an error message saying “connection refused”.
There is not any other interface connected to the controller when I try this.
Any thoughts on what could be causing this and / or things I can try?

Thanks,

Jack

2

What version FluidNC are you running?

If it’s greater than 4.0.0, you might need to connect on port 80.

3

Thanks for the response.

I am using the web installer and it looks like 4.0.3 is the version I have.
I have tried connecting on port 80. When I try this, bCNC appears to connect but the program freezes up and becomes unresponsive. I dealt with this by de-powering my RPi.

4

I’ve never heard of bCNC… maybe just want to make sure it supports the version of firmware you are on, if they say it supports FluidNC

5

Just checked the response on port 80. with the terminal open, I get the following error message:

read failed: [Errno 104] Connection reset by peer.

Googling the error message told me that this means the remote end of the network connection (the controller board) terminated connection.

6

bCNC is a light weight gCode sender that works well on Raspberry Pi. The FluidNC wiki (the page on GCode senders) links to the bCNC github page. I like bCNC because it has some minimal CAM features that I am familiar with.
I would think that any GCode sender would have to be able to connect over web sockets.

7

Port 23 or Port 81

Fluidnc rejects port 80 connections

8

image

it changed after 4.0.0

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9

I installed bCNC on Windows and was able to connect with these settings. You’ll need to use socket://192.168.0.234:23

image
image603×122 3.81 KB

This implies bCNC is using a normal TCP connection instead of a websocket connection.

2 Likes
10

That’s what it’s doing. bCNC has a great surface probe solution. I’ve seen it used to mill PCBs on cheap 3018 CNCs in the past.

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11

That worked! Huge thanks!

Jack

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