Actually… The Blynk Blink sketch is an essential base sketch, using Blynk’s direct GPIO pin control that can relate to most any widget.
Just load it up, place a gauge on your App set to an analog pin and hook up a POT to the same analog pin… done.
Or you can place a Gauge and a Slider, set both to the same vPin and watch the gauge move in accordance to the slider… meanwhile, using another example like the Get Data example as a base, you could then use a BLYNK_WRITE(vPin) function to see the same slider action in the sketch for dimming an LED or something.
The gauge on a digital pin might even recognise a PWM signal on that pin?? I haven’t tested that… EDIT nope, in direct GPIO mode, it is meant for Analog pins only. But with virtual pins it can display any integer value in it’s range.