# Clarity needed on operating (node-red-node-daemon)
**URL:** https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876
**Category:** General
**Created:** [25 July 2021 10:39 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876 "2021-07-25T10:39:42Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Gunner](https://discourse.nodered.org/u/Gunner)
#### Post date: [25 July 2021 10:39 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876/1 "2021-07-25T10:39:43Z")
I have a bunch of demo scripts for my SSD1330 SPI based Colour OLED Display. It seems the only way to control this display is via Python scripts. Fine, I can do that 😛 But I wanted to try controlling it via Node-Red.
I found the `daemon` node, and it works just fine as is (repeatedly runs my script) but the directions are unclear as to how to control the node more precisely.
_**Setting `msg.kill` to a signal name (e.g. SIGINT, SIGHUP) will stop the process - but if the restart flag is set it will then auto restart.**_
_ **Sending `msg.start` will also re-start the process.** _
After unchecking the auto-start/relaunch flags, I have tried setting up to inject nodes to send `msg.start` and `msg.kill`... but nothing seems to work, it just throws this clear error `Command not running`... doh, I can see that 😛
What am I not seeing?
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [25 July 2021 10:47 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876/2 "2021-07-25T10:47:05Z")
start...
in the left had side, change payload to start
in the righthand side, change to bool -\> true
kill...
in the left had side, change payload to kill
in the righthand side, change to kill -\> string _ **SIGINT** _ or _ **SIGHUP** _
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### Author:  [@Gunner](https://discourse.nodered.org/u/Gunner)
#### Post date: [25 July 2021 10:54 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876/3 "2021-07-25T10:54:01Z")
Thanks 😃 Works perfectly!!
I wish the directions themselves for many nodes were this clear for us uninitiated users 😊
I was close on the start command... but had left the right side (payload) blank. Makes sense now that I see it... duh 😛
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### Author:  [@Gunner](https://discourse.nodered.org/u/Gunner)
#### Post date: [25 July 2021 11:11 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876/4 "2021-07-25T11:11:51Z")
Oh boy... perhaps it is too late and I need sleep, but this seemed like it should work?
(I tried with and without quotes)
The Error doesn't make sense either... I thought I was sending a string?
```auto
msg.payload : number
-2
```
---
### Author:  [@Gunner](https://discourse.nodered.org/u/Gunner)
#### Post date: [25 July 2021 11:44 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876/5 "2021-07-25T11:44:19Z")
Well, if anyone can answer that last one, fine... meanwhile I found an alternative that works as expected.
Function contains this:
```auto
let str1 = "/home/pi/luma.examples/examples/";
let str2 = msg.payload;
let str3 = " -d ssd1331 -i spi --width 96";
let res = str1.concat(str2, str3);
msg.payload = res;
return msg;
```
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [8 August 2021 11:44 UTC](https://discourse.nodered.org/t/clarity-needed-on-operating-node-red-node-daemon/48876/6 "2021-08-08T11:44:50Z")
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