Keyboard Input in nodered

General
1

Hi I have a raspberry PI with 2 barcode scanners attached to it. As we all know, barcode scanners just emulates the Keyboard signal. I want to know whether the input signal is coming from barcode #1 or barcode #2 in node-red. Is it possible to have them like a "Device ID" or any identification for me to identify whether barcode 1 or barcode 2 sends the input signal?

Thank you.

With kind regards,
Henjoe

2

How are the scanners attached to the pi?
What node are you using to read them?
Is the same node reading them both? If not why not add a change node after the reader to add the name of the device to the msg object?

3

You don't say what node you are using to read the HID data from the scanner.
Maybe a node like node-red-contrib-usbhid has some more option to read the serial or device-id.
Most of these scanners can be programmed, as last solution you can add an extra different prefix to the scanner and filter that prefix if the data is coming in.

4

Hi zenofmud,

Thanks for your input. The barcode scanner is actually attached via a USB port.

To be honest, I don't know yet what node/flows should I use to get the barcode scanned input.
Hope you can suggest one.

Again, thank you for your information.

5

Thanks for your suggestion. I actually don't know what node should I use, your suggestion is highly appreciated and I will look on this.

With kind regards

6

Have you looked in the Flows tab here on the forum? Have you searched the forum for barcode to see what comes up?

7

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