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.

Send Buffer over usb Serial Node

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dceejay 9 October 2019 10:25 4

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
Which version of node.js, Node-RED and serialport node are you using ?

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Send Buffer over usb Serial Node

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