Chicken house door: use all pins of ESP8266

Projects General Guidance
6

I will check that threads.
Wifi is not necessary to use, thats correct. But when ESP have WIFI function....

Anyway, I will ask you if you know how to set up stepper be controlled over PCF8574 i2c?

I had some code which was working on control stepper with regular connection to esp.
When I put PCF8574 between, I am confuse how control over is working. (my pcf if on 0x20 address).

#include <PCF8574.h>
#include <AccelStepper.h>

const int stepsPerRevolution = 2048;  // change this to fit the number of steps per revolution

// ULN2003 Motor Driver Pins before:
/*#define IN1 14
#define IN2 12
#define IN3 13
#define IN4 15*/

#define IN1 P0
#define IN2 P1
#define IN3 P2
#define IN4 P3

// Set the i2c HEX address
PCF8574 pcf8574(0x20);

// initialize the stepper library
AccelStepper stepper(AccelStepper::HALF4WIRE, IN1, IN3, IN2, IN4);

void setup() {
  // initialize the serial port
  Serial.begin(115200);

  // Set the pinModes
  pcf8574.pinMode(P0, OUTPUT);
  pcf8574.pinMode(P1, OUTPUT);
  pcf8574.pinMode(P2, OUTPUT);
  pcf8574.pinMode(P3, OUTPUT);
  pcf8574.begin();
  
  // set the speed and acceleration
  stepper.setMaxSpeed(700);//500
  stepper.setAcceleration(100);
  // set target position
  stepper.moveTo(4*stepsPerRevolution); //1*
}

void loop() {
  // check current stepper motor position to invert direction
  if (stepper.distanceToGo() == 0){
    stepper.moveTo(-stepper.currentPosition());
    Serial.println("Changing direction");
  }
  // move the stepper motor (one step at a time)
  stepper.run();
}

But as you probably expect, control of stepper fail. Lights on driver of stepper shine but thats all.