Im trying to send a Buffer over the Serial Node. When injecting said buffer my debug window says folowing: TypeError [ERR_INVALID_ARG_TYPE]: The "list[1]" argument must be one of type Array, Buffer, or Uint8Array. Received type string Now that error message is very strange to me cause im sending …

I met with the same problem after upgrading node-red. After hours of reinstall node-red, finally find the root cause. Some how the Serial port setting: "Add character to output messages" get a value of "false" in it. This value caused the problem. Remove the value and leave it blank solved the it.

Hi, please format your flow using the code button or put it between backticks... ``` code ``` Otherwise it is unusable and people won't be able to help you.

I edited it, i believe now its the way you ment it. Thx :grinning:

That flow looks good to me. (PS Buffer is a type of object so yes it is an object - you need Buffer.isBuffer(foo) to test if it really is a buffer :slight_smile: Which version of node.js, Node-RED and serialport node are you using ?

Well when pressing the Menu icon to the upper right it shows v1.0.1 But i i thought it was a Version problem two so i ran this script on my pi.

For everyone having this problem! Try redownloading Node red with this script it might already solve youre problem. If not you might have to set up youre raspberry pi again from scratch. This step is quite time consuming so you might not wana do it if youre not shure theres no other way cause im c…

Thanks Mling. This solves my issue as well.

Yes!! This solved my issue! Great and thank you. I didn't want to believe that I have to reinstall node-red again :-/ It would make sense, that Evian marks the correct solution :slight_smile:

THX todaly forgot about this thing so i never thought about any of this. But for the future if ever you need to install Node-Red or update it this could help you. Its a script that does everything automaticaly for you.

Hello, Evian. I have the same problem. I finally solved the problem after reading your post. thank you

Node-RED

Node-RED Forum

Send Buffer over usb Serial Node

General

dceejay 1 December 2019 17:57 9

Thanks for mentioning - pushed a fix so shouldn't happen again.

Sending buffers to Serial Port Node - Error

Topic		Replies	Views
Sending buffers to Serial Port Node - Error General	6	1132	16 September 2020
usb-Serial-port:how to send a message like Pyserial? General	5	1759	30 April 2020
How to send this HEX command to my device using Node-red General	42	1283	31 January 2023
A buffer as payload from function node General function-node	4	201	10 January 2025
Function can not send Buffer? + Serial problem Hardware	14	1190	5 April 2021

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Send Buffer over usb Serial Node

Related topics