Vertical slider

An up-and-down slider. Same min, max, and send rules as the horizontal slider. The sample range includes a negative minimum.

Sample pin: V9

Set it up on the server

Sign in to the Box IO dashboard and open the project that uses this device key.
Turn on Edit.
In Edit, add Vertical slider.
Set Virtual pin to 9.
Set Min to -10 and Max to 10. Type the minus sign, then press Enter. The field applies when you leave it, not on every key.
Save the layout and drag the slider in Live.
Flash the sketch below with the same device key, host, and port 5923. Keep BoxIO.run() in loop().

Properties

Sketch values are always strings, including numbers: BoxIO.setProperty(V2, "max", "200").

Property	Where to set it	Format	Example	Effect
`min`	Dashboard or sketch	Number, negatives allowed	`5`	Left or bottom end of the track. Press Enter or leave the field to apply it on the dashboard.
`max`	Dashboard or sketch	Number, negatives allowed	`50`	Right or top end of the track. If max is less than min, the track swaps them. If they are equal, max becomes min + 1.
`color`	Dashboard or sketch	#RRGGBB	`#7aa2ff`	Fill and thumb color.
`label`	Dashboard or sketch	Plain text	`Pump`	Caption above the widget. On a round or oval button this is the caption, not the word on the button face.
`hideLabel`	Dashboard	On or off	`checked`	Hides the caption. Button face text, meter numbers, and label text stay visible.
`fontSize`	Dashboard	Whole number 8 to 160, or blank for automatic size	`28`	Text size in pixels inside the widget.
`opacity`	Dashboard	10% to 100%	`70%`	Lets an overlapping widget show through. 100% is solid.

Formatting

Negative limits are normal text: min -10, max 10.
The sketch receives the chosen number as text. param.asInt() understands a leading minus.
The value readout sits beside the track so the thumb does not cover it.

Sketch

Paste the device key over bx_paste_your_device_key_here. Wi-Fi boards include BoxIOEsp32.h. Ethernet boards use the same calls with an EthernetClient.

#define BOXIO_AUTH "bx_paste_your_device_key_here"
#define WIFI_SSID  "your-ssid"
#define WIFI_PASS  "your-password"
#define BOXIO_HOST "boxio.krmsproducts.net"
#define BOXIO_PORT 5923

#include <BoxIOEsp32.h>

void setup() {
  BoxIO.begin(BOXIO_AUTH, WIFI_SSID, WIFI_PASS, BOXIO_HOST, BOXIO_PORT);
BoxIO.setProperty(V9, "label", "V Slider");
  BoxIO.setProperty(V9, "min", "-10");
  BoxIO.setProperty(V9, "max", "10");
  BoxIO.setProperty(V9, "color", "#f5b942");
}

void loop() {
  BoxIO.run();

}

BOX_WRITE(V9) {
  int level = param.asInt();
  Serial.println(level);
}

What you should see

The track runs from -10 at the bottom to 10 at the top. Serial prints the released value, including negatives.