Using USB communication in pre 2021 units
Posted: Wed Feb 17, 2021 4:34 pm
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.
Regards, Luis
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.
Regards, Luis