# Socket.IO with CNCjs
**URL:** https://discourse.nodered.org/t/socket-io-with-cncjs/75719
**Category:** General
**Created:** [25 February 2023 05:53 UTC](https://discourse.nodered.org/t/socket-io-with-cncjs/75719 "2023-02-25T05:53:57Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@MadTooler](https://discourse.nodered.org/u/MadTooler)
#### Post date: [25 February 2023 05:53 UTC](https://discourse.nodered.org/t/socket-io-with-cncjs/75719/1 "2023-02-25T05:53:57Z")
I am running a raspberry pi4 with node-red and CNCjs together as part of a CNC motion control system. CNCjs is connected to a serial port where a raspberry pi pico (rp2040) is running grblHAL firmware. I am running into some roadblocks trying to use node-red as a pendant to control the machine through the CNCjs server.
CNCjs connects to the serial port and allows access to the port through a server. It requires a [socket.IO](http://socket.IO) connection to both send and receive allowed commands between the grblHAL and any networked device working as a pendant that uses the protocol. There are some pendant examples at [CNCjs main github page.](https://github.com/cncjs)
At this point, I am still trying to figure out how much I don't know so I can start researching the correct bits needed for the communication. For example: which socketio nodes, if any, are compatible and will handle the "token" handshaking. If and where I can use some of the js code examples from CNCjs within node-red, or if they are not compatible with nodejs. Or if there is already a working example of all of this somewhere that I overlooked.
Thanks for any help anyone can spare.
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### Author:  [@MadTooler](https://discourse.nodered.org/u/MadTooler)
#### Post date: [15 March 2023 07:18 UTC](https://discourse.nodered.org/t/socket-io-with-cncjs/75719/2 "2023-03-15T07:18:09Z")
I think I am moving on from this for now. Instead of using CNCjs and limiting myself to communication over [socket.IO](http://socket.IO), I am trying to bring full sender capability into the NR environment. Maybe I will try to drag some of the CNCjs code bits into NR since they are in node.js. Anyone else interested in the same?
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [14 May 2023 07:18 UTC](https://discourse.nodered.org/t/socket-io-with-cncjs/75719/3 "2023-05-14T07:18:21Z")
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