Error with neopixels


Setup a new pi - installed Node-RED from script - added Blocky and Neopixel nodes using palette

I'm getting this showing up in editor

and this in the terminal window

pi@27Jun18_19Sep18:~/.node-red $ node-red
23 Sep 15:06:25 - [info] 

Welcome to Node-RED

23 Sep 15:06:25 - [info] Node-RED version: v0.19.4
23 Sep 15:06:25 - [info] Node.js  version: v8.12.0
23 Sep 15:06:25 - [info] Linux 4.14.50-v7+ arm LE
23 Sep 15:06:26 - [info] Loading palette nodes
23 Sep 15:06:32 - [info] Settings file  : /home/pi/.node-red/settings.js
23 Sep 15:06:32 - [info] Context store  : 'default' [module=memory]
23 Sep 15:06:32 - [info] User directory : /home/pi/.node-red
23 Sep 15:06:32 - [warn] Projects disabled : editorTheme.projects.enabled=false
23 Sep 15:06:32 - [info] Flows file     : /home/pi/.node-red/flows_27Jun18_19Sep18.json
23 Sep 15:06:33 - [warn] 

Your flow credentials file is encrypted using a system-generated key.

If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.

You should set your own key using the 'credentialSecret' option in
your settings file. Node-RED will then re-encrypt your credentials
file using your chosen key the next time you deploy a change.

23 Sep 15:06:33 - [info] Starting flows
23 Sep 15:06:33 - [info] Started flows
23 Sep 15:06:33 - [info] Server now running at
23 Sep 15:07:19 - [info] Installing module: node-red-node-pi-neopixel, version: 0.0.21
23 Sep 15:07:33 - [info] Installed module: node-red-node-pi-neopixel
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named neopixel
23 Sep 15:07:33 - [warn] rpi-neopixels : Raspberry Pi specific node set inactive
23 Sep 15:07:33 - [info] Added node types:
23 Sep 15:07:33 - [info]  - node-red-node-pi-neopixel:rpi-neopixels
23 Sep 15:08:07 - [info] Stopping flows
23 Sep 15:08:07 - [info] Stopped flows
23 Sep 15:08:07 - [info] Starting flows
23 Sep 15:08:07 - [info] Started flows

Tried un-installing/rebooting/re-installing and made no diff - I have installed Pimoroni unicornhat lib via their script and I can get Neopixels to shine using their example scripts


When yousetup the Pi, did you run the bash script at: ?


Yes I did


did you install the python driver that the prerequisite tells you to?


The Neopixel python driver need to be pre-installed... The easiest way to get the driver installed is to use the Unicorn HAT drivers install script... see the Pimoroni Getting Started with Unicorn HATpage.

curl -sS | bash


Yes. JFI I've use node this on several Pi and have contributed to the code on Github but never had an error like this


have you ever installed those two nodes together?


python vrs python3 maybe??? which do you have installed?


On all my pi


Its a pi so they have always come with both. Like I said, running the example python scripts work fine


Hi.. ooops was checking for the old version of the library - - version 0.0.22 should now be better.


Thanks very much :slight_smile:


Thanks for reporting it !


Are there plans for a UnicornHD node?


Not unless someone who has one writes one.... ( no hint implied)


I've made a start but wasn't 100% sure which values apply to the upper LED indices. Oh well, I'll just have to suck it and see.