AIO pins 0-5v reading 3.150v

[Honeybadger]

I’m injecting 5v on the pins AI1-8 and they are supposed to read 0-5v but in Home Assistant they read 3.150v

I used the pin 5v from the board to test it too, only reads 3.150v

[admin]

what voltage value showed in KCS monitor webpage?

[Honeybadger]

what voltage value showed in KCS monitor webpage?

How do I access that page after the system is all configured and installed into home assistant?
I have the AIO connected to the router via ethernet cable.

[admin]

do you want download KCS firmware or firmware by ESPHome yaml?

[Honeybadger]

do you want download KCS firmware or firmware by ESPHome yaml?

I don't know how to access the KCS monitor page, can you guide me?
The board is installed on Home Assistant using the ESPHome yaml file provided by you.

I have attached here my YAML file.

[admin]

which channel you have connected with analog signal, you can take a photo how you wire, we can test as your photo.

[Honeybadger]

which channel you have connected with analog signal, you can take a photo how you wire, we can test as  your photo.

Pictures attached here.
I'm basically connecting the 5v from the AIO directly into the AI-03 to test the 5v readings from Home Assistant but I'm getting 3.150v instead of 5v.

[admin]

try to replace this pin:36 code with new code:
  - platform: adc
    pin: 36
    id: adc36
    update_interval: never
    attenuation: 11db

-----------------------------to new----------
  - platform: adc
    pin: 36
    id: adc36
    name: "A32 Pro A1 Voltage"
    update_interval: never
    attenuation: 11db
    filters:
      - lambda:
          if (x >= 3.11) {
            return x * 1.60256;
          } else if (x <= 0.15) {
            return 0;
          } else {
            return x * 1.51;
          }

Code:

  - platform: adc
    pin: 36
    id: adc36
    name: "A32 Pro A1 Voltage"
    update_interval: never
    attenuation: 11db
    filters:
      - lambda:
          if (x >= 3.11) {
            return x * 1.60256;
          } else if (x <= 0.15) {
            return 0;
          } else {
            return x * 1.51;
          }

[Honeybadger]

try to replace this pin:36 code with new code:
  - platform: adc
    pin: 36
    id: adc36
    update_interval: never
    attenuation: 11db

-----------------------------to new----------
  - platform: adc
    pin: 36
    id: adc36
    name: "A32 Pro A1 Voltage"
    update_interval: never
    attenuation: 11db
    filters:
      - lambda:
          if (x >= 3.11) {
            return x * 1.60256;
          } else if (x <= 0.15) {
            return 0;
          } else {
            return x * 1.51;
          }

Code:

  - platform: adc
    pin: 36
    id: adc36
    name: "A32 Pro A1 Voltage"
    update_interval: never
    attenuation: 11db
    filters:
      - lambda:
          if (x >= 3.11) {
            return x * 1.60256;
          } else if (x <= 0.15) {
            return 0;
          } else {
            return x * 1.51;
          }

After this update the sensor is not reading anything.

[Honeybadger]

Is the ADC sensor good enough for millivolt readings?
Are the sensors reading 0-5v or something else and then transforming it with calculations?