Input 1-2 not working

[erkkis]

Hi,

I ordered A6 from Aliexpress. Seems the device otherwise works well, but digital inputs 1-2 are not working while inputs 3-6 work fine. Inputs were tested only by connecting GND to input 1-6 via jumper wire.

Chat with Aliexpress seller asked to contact via Whatsapp. After doing everything required I was asked to post here (don't know why).

What I have done:

Step 1. ESPHome

I tested it with ESPHome code from here https://devices.esphome.io/devices/KinCony-KC868-A6.

Digital inputs 3-6 work, digital inputs 1-2 don't work, relays 1-6 work.

Step 2. Arduino code

I tested with this code:

Code:

#include <Wire.h>
#include "PCF8574.h"
#define SDA_PIN 4    // I2C SDA pin
#define SCL_PIN 15  // I2C SCL pin
PCF8574 pcf8574_input(0x22);  // PCF8574 address for inputs
void setup() {
  Serial.begin(115200);
  Wire.begin(SDA_PIN, SCL_PIN);
  // Initialize PCF8574 inputs
  for (int i = 0; i < 6; i++) {
    pcf8574_input.pinMode(i, INPUT);
  }
  // Check if PCF8574 is detected
  if (!pcf8574_input.begin()) {
    Serial.println("Error: PCF8574 (0x22) not detected!");
  } else {
    Serial.println("PCF8574 (0x22) detected.");
  }
}
void loop() {
  Serial.print("Inputs: ");
  // Read all 6 input pins
  for (int i = 0; i < 6; i++) {
    int state = pcf8574_input.digitalRead(i);
    Serial.print(state);
    Serial.print(" ");  // Print space between values
  }
  Serial.println();  // New line
  delay(500);  // Delay for readability
}

It monitors inputs and prints out values. Inputs 1-2 don't print anything, inputs 3-6 work fine.

Step 3. KCS firmware
Whatsapp chat told to: "you can download KCS firmware to test board whether work well"

I did that and tested again the same scenarios. Result is the same: Digital inputs 3-6 work, digital inputs 1-2 don't work, relays 1-6 work.

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What should I do?