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Using USB communication in pre 2021 units

Posted: Wed Feb 17, 2021 4:34 pm
by Luis Sa
Hello,

With firmware 6.4, you can use USB to communicate between the multiplexer and a PC or laptop. However you need to make a small modification on the PCB. You need to solder a 470R resistor between the TX and D4 pin of the Wemos D1 mini board. The resistance should be soldered under the PCB. Remove the 4 screws that hold the PCB to the box plate and place the resistance as shown in the following picture.

470R.jpg

Regards, Luis

Re: Using USB communication in pre 2021 units

Posted: Mon Nov 22, 2021 7:24 pm
by Juanvi
Buenas tardes Luis, en la placa Versión 5.0 como se puede hacer esta modificación
Gracias