Control digital potentiometer through home assistant via esphome?

ESPHome
3

Thanks! Can’t understand why I missed the home assistant sensor.

Seems to be working fine. I can set the state in HA and I see that the value is read by the esp.

Now I guess I have to write a custom spi device https://esphome.io/custom/spi.html
Should it be included with:

esphome:
  includes:
    - my_custom_spi_device.h

How can I use the state value in the custom spi code?

I have a arduino sketch like this. I can set any value between 1-255 and it works.

#include <SPI.h>

byte address = 0x00;
int CS= D8;

void setup()
{
pinMode (CS, OUTPUT);
SPI.begin();
digitalPotWrite(150)
}

void loop()
{

}

int digitalPotWrite(int value)
{
digitalWrite(CS, LOW);
SPI.transfer(address);
SPI.transfer(value);
digitalWrite(CS, HIGH);
}

How can I rewrite this for esphome and replace the value “150” with the value from home assistant?
I know that I have to recalculate the temperature to a proper wiper value between 1-255 but first I need to find out how to get the custom spi component to work.

BR/Nicklas