Vertical Slider

The Vertical Slider sends a number in a range, the same as the Slider, with an up and down track.

Use it when up means more: a fader, a tank setpoint, a damper, a light level in a column of controls.

Open these from the canvas: tap Edit, then long press the widget and choose Configure.

Example

A fan speed control on V12.

#include <PlynxSimpleEsp32.h>

#define FAN_PIN  27
#define PWM_FREQ 25000                // above hearing range for fans
#define PWM_BITS 8

PLYNX_WRITE(V12)
{
  ledcWrite(FAN_PIN, param.asInt());  // 0 to 255
}

void setup()
{
  Serial.begin(115200);
  ledcAttach(FAN_PIN, PWM_FREQ, PWM_BITS);

  // Auto setup: WiFi and the Plynx token are configured from the app.
  //
  // To provide them directly in the sketch instead, use:
  //   Plynx.begin(auth, ssid, pass);
  Plynx.begin();
}

void loop()
{
  Plynx.run();
}

Set the widget range to 0 to 255 to match 8 bit PWM. A widget range of 0 to 100 sends 100 at the top, which drives the fan at 39 per cent.

Many fans stall below a minimum duty. Clamp the low end in code rather than letting the slider send values the fan cannot use.

Troubleshooting

Next

• Slider
• Step
• How virtual pins work