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  [arduino code examples for T64M]-07 i2c scanner search online devices
Posted by: admin - 04-20-2025, 07:45 AM - Forum: T64M - No Replies

Code:
// Made by KinCony IoT: https://www.kincony.com
// This sketch scans two I2C buses and prints all detected device addresses.
// IIC Bus-1: SDA - GPIO48, SCL - GPIO47
// IIC Bus-2: SDA - GPIO12, SCL - GPIO11

#include <Wire.h>

// Create two I2C bus objects
TwoWire I2C_BUS1 = TwoWire(0);
TwoWire I2C_BUS2 = TwoWire(1);

// Scan function for a specific I2C bus
void scanI2CBus(TwoWire &bus, const char* busName) {
  Serial.println();
  Serial.print("Scanning ");
  Serial.print(busName);
  Serial.println(" at 100kHz...");

  byte error, address;
  int nDevices = 0;

  for (address = 1; address < 127; address++) {
    bus.beginTransmission(address);
    error = bus.endTransmission();

    if (error == 0) {
      Serial.print("I2C device found at address 0x");
      if (address < 16)
        Serial.print("0");
      Serial.print(address, HEX);
      Serial.println("  ✓");
      nDevices++;
    } else if (error == 4) {
      Serial.print("Unknown error at address 0x");
      if (address < 16)
        Serial.print("0");
      Serial.println(address, HEX);
    }
  }

  if (nDevices == 0)
    Serial.println("No I2C devices found.");
  else
    Serial.println("Scan completed.");
}

void setup() {
  Serial.begin(115200);
  delay(1000); // Wait for serial to initialize

  // Initialize IIC Bus-1 (GPIO48 = SDA, GPIO47 = SCL) at 100kHz
  I2C_BUS1.begin(48, 47);

  // Initialize IIC Bus-2 (GPIO12 = SDA, GPIO11 = SCL) at 100kHz
  I2C_BUS2.begin(12, 11);

  // Start scanning both buses
  scanI2CBus(I2C_BUS1, "IIC Bus-1");
  scanI2CBus(I2C_BUS2, "IIC Bus-2");
}

void loop() {
  // Nothing to do in the loop
}
arduino ino file download:

.zip   7-i2c-scanner.zip (Size: 841 bytes / Downloads: 406)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   7-i2c-scanner.ino.merged.zip (Size: 192.17 KB / Downloads: 417)

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  [arduino code examples for T64M]-06 digital INPUT trigger OUTPUT directly
Posted by: admin - 04-20-2025, 07:44 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This Arduino program reads 64 input channels from 4 PCF8575 modules on I2C Bus-2
* and controls 64 output channels on 4 PCF8575 modules on I2C Bus-1.
* When an input pin is pulled LOW (connected to GND), the corresponding output relay is turned ON (LOW).
* Otherwise, the relay is turned OFF (HIGH).
*
* I2C Bus-1 (Outputs):
* - SDA: GPIO 48
* - SCL: GPIO 47
* - Output1~16  : 0x25
* - Output17~32 : 0x24
* - Output33~48 : 0x21
* - Output49~64 : 0x20
*
* I2C Bus-2 (Inputs):
* - SDA: GPIO 12
* - SCL: GPIO 11
* - Input1~16   : 0x25
* - Input17~32  : 0x24
* - Input33~48  : 0x21
* - Input49~64  : 0x20
*/

#include <Wire.h>
#include <PCF8575.h>

// === Create two independent Wire objects ===
TwoWire I2C_Output = TwoWire(0);  // I2C Bus 1 - for output control
TwoWire I2C_Input  = TwoWire(1);  // I2C Bus 2 - for reading inputs

// === Output PCF8575 modules (connected to relays) ===
PCF8575 output_1(0x25, &I2C_Output);  // Output 1-16
PCF8575 output_2(0x24, &I2C_Output);  // Output 17-32
PCF8575 output_3(0x21, &I2C_Output);  // Output 33-48
PCF8575 output_4(0x20, &I2C_Output);  // Output 49-64

// === Input PCF8575 modules ===
PCF8575 input_1(0x25, &I2C_Input);    // Input 1-16
PCF8575 input_2(0x24, &I2C_Input);    // Input 17-32
PCF8575 input_3(0x21, &I2C_Input);    // Input 33-48
PCF8575 input_4(0x20, &I2C_Input);    // Input 49-64

// === Arrays to manage all input/output modules ===
PCF8575* inputArray[4]  = { &input_1, &input_2, &input_3, &input_4 };
PCF8575* outputArray[4] = { &output_1, &output_2, &output_3, &output_4 };

void setup() {
  Serial.begin(115200);
  Serial.println("KinCony 64-Channel Input-Output Mapping Test");

  // Initialize I2C buses
  I2C_Output.begin(48, 47); // SDA: GPIO48, SCL: GPIO47
  I2C_Input.begin(12, 11);  // SDA: GPIO12, SCL: GPIO11

  // Initialize all PCF8575 modules
  for (int i = 0; i < 4; i++) {
    inputArray[i]->begin();
    outputArray[i]->begin();

    // Initially turn off all relays (set to HIGH)
    for (int j = 0; j < 16; j++) {
      outputArray[i]->write(j, HIGH);
    }
  }
}

void loop() {
  for (int chip = 0; chip < 4; chip++) {
    for (int pin = 0; pin < 16; pin++) {
      int globalPin = chip * 16 + pin;  // 0~63
      bool inputState = inputArray[chip]->read(pin);

      // 0 = Signal present (connected to GND), relay ON (output LOW)
      // 1 = No signal, relay OFF (output HIGH)
      outputArray[chip]->write(pin, inputState ? HIGH : LOW);
    }
  }

  delay(200); // Slight delay to avoid excessive reading
}
arduino ino file download:

.zip   6-input-trigger-output.zip (Size: 1.17 KB / Downloads: 428)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   6-input-trigger-output.ino.merged.zip (Size: 192.34 KB / Downloads: 398)

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  b16m programing blinds
Posted by: Mkuzman - 04-20-2025, 07:41 AM - Forum: "KCS" v3 firmware - Replies (16)

I need help
How di I program the controller to control the blind motor?
For example
If I press the up button once, the motor rotates to the end switsh, i.e. for a certaim mumber of secends, if I hold the same switch, the motor rotates "up" for as long as I hold  it, when I release it the motor stops.
The same procedure for lowering.
but if the button for lowering the blinds is pressed, then all the signals from digital input 1 stop
button for rising  is digital input 1, button for lowering is digital input 2

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  [arduino code examples for T64M]-05 Ethernet W5500 chip work with TCP Server mode
Posted by: admin - 04-20-2025, 07:40 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This Arduino program sets up an ESP32-S3 with a W5500 Ethernet module
* as a TCP server. It listens on port 4196 and echoes back any string
* received from a client.
*
* Hardware connections:
* - CLK: GPIO42
* - MOSI: GPIO43
* - MISO: GPIO44
* - CS: GPIO41
* - RST: GPIO1
* - INT: GPIO2
*
* Static IP address: 192.168.3.55
* Subnet Mask: 255.255.255.0
* Gateway: 192.168.3.1
* DNS: 192.168.3.1
*/

#include <SPI.h>
#include <Ethernet.h>

// Define the W5500 Ethernet module pins
#define W5500_CS_PIN  41
#define W5500_RST_PIN 1
#define W5500_INT_PIN 2
#define W5500_CLK_PIN 42
#define W5500_MOSI_PIN 43
#define W5500_MISO_PIN 44

// MAC address for your Ethernet shield (must be unique on your network)
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

// Static IP address configuration
IPAddress ip(192, 168, 3, 55);       // Static IP address
IPAddress subnet(255, 255, 255, 0);   // Subnet mask
IPAddress gateway(192, 168, 3, 1);    // Default gateway
IPAddress dns(192, 168, 3, 1);        // DNS server address

// Create an EthernetServer object to handle TCP connections
EthernetServer server(4196);

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  while (!Serial) {
    ; // Wait for serial port to connect
  }

  // Initialize the W5500 module
  pinMode(W5500_RST_PIN, OUTPUT);
  pinMode(W5500_INT_PIN, INPUT);
  digitalWrite(W5500_RST_PIN, LOW);  // Reset the W5500 module
  delay(100);                       // Wait for reset to complete
  digitalWrite(W5500_RST_PIN, HIGH); // Release reset

  // Initialize SPI with the correct pin definitions
  SPI.begin(W5500_CLK_PIN, W5500_MISO_PIN, W5500_MOSI_PIN);

  // Set up the Ethernet library with W5500-specific pins
  Ethernet.init(W5500_CS_PIN);

  // Start the Ethernet connection with static IP configuration
  Ethernet.begin(mac, ip, dns, gateway, subnet);

  // Print the IP address to the serial monitor
  Serial.print("IP Address: ");
  Serial.println(Ethernet.localIP());

  // Start listening for incoming TCP connections
  server.begin();
}

void loop() {
  // Check for incoming client connections
  EthernetClient client = server.available();
  if (client) {
    Serial.println("New client connected");

    // Read data from the client and echo it back
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        server.write(c);
      }
    }

    // Close the connection when done
    client.stop();
    Serial.println("Client disconnected");
  }
}
arduino ino file download:

.zip   5-Ethernet-W5500.zip (Size: 1.23 KB / Downloads: 429)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   5-Ethernet-W5500.ino.merged.zip (Size: 191.08 KB / Downloads: 421)

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  [arduino code examples for T64M]-04 Read free GPIO state
Posted by: admin - 04-20-2025, 07:38 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* GPIO Status Monitoring
*
* This program monitors the status (high or low) of multiple GPIO pins on the ESP32-S3.
* It prints the status of the pins to the serial monitor whenever a change is detected.
*
* GPIO Pins Monitored:
* - GPIO 8
* - GPIO 9
* - GPIO 10
* - GPIO 15
* - GPIO 16
* - GPIO 17
* - GPIO 18
* - GPIO 0
*
* Hardware Requirements:
* - Connect the pins to appropriate devices or pull them to HIGH/LOW for testing
*/

#define GPIO_PIN_8 8
#define GPIO_PIN_9 9
#define GPIO_PIN_10 10
#define GPIO_PIN_15 15
#define GPIO_PIN_16 16
#define GPIO_PIN_17 17
#define GPIO_PIN_18 18
#define GPIO_PIN_0 0

// Store the previous state of the GPIO pins
bool prevState[8] = {false, false, false, false, false, false, false, false};

void setup() {
  // Initialize serial communication for debugging purposes
  Serial.begin(115200); // Initialize the serial monitor at 115200 baud
  while (!Serial);      // Wait for the serial monitor to open

  // Initialize GPIO pins as inputs
  pinMode(GPIO_PIN_8, INPUT);
  pinMode(GPIO_PIN_9, INPUT);
  pinMode(GPIO_PIN_10, INPUT);
  pinMode(GPIO_PIN_15, INPUT);
  pinMode(GPIO_PIN_16, INPUT);
  pinMode(GPIO_PIN_17, INPUT);
  pinMode(GPIO_PIN_18, INPUT);
  pinMode(GPIO_PIN_0, INPUT);

  Serial.println("GPIO Status Monitoring Started");
}

void loop() {
  // Read the current state of each GPIO pin
  bool currentState[8];
  currentState[0] = digitalRead(GPIO_PIN_8);
  currentState[1] = digitalRead(GPIO_PIN_9);
  currentState[2] = digitalRead(GPIO_PIN_10);
  currentState[3] = digitalRead(GPIO_PIN_15);
  currentState[4] = digitalRead(GPIO_PIN_16);
  currentState[5] = digitalRead(GPIO_PIN_17);
  currentState[6] = digitalRead(GPIO_PIN_18);
  currentState[7] = digitalRead(GPIO_PIN_0);

  // Check for changes in GPIO pin states
  for (int i = 0; i < 8; i++) {
    if (currentState[i] != prevState[i]) {
      // Print the pin number and its new state if it has changed
      Serial.print("GPIO ");
      Serial.print(i == 0 ? GPIO_PIN_8 :
                   i == 1 ? GPIO_PIN_9 :
                   i == 2 ? GPIO_PIN_10 :
                   i == 3 ? GPIO_PIN_15 :
                   i == 4 ? GPIO_PIN_16 :
                   i == 5 ? GPIO_PIN_17 :
                   i == 6 ? GPIO_PIN_18 : GPIO_PIN_0);
      Serial.print(" changed to ");
      Serial.println(currentState[i] ? "HIGH" : "LOW");
      // Update the previous state
      prevState[i] = currentState[i];
    }
  }

  // Delay to avoid flooding the serial monitor
  delay(100); // Adjust the delay as needed
}
arduino ino file download:

.zip   4-free-gpio-state.zip (Size: 1.04 KB / Downloads: 381)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   4-free-gpio-state.ino.merged.zip (Size: 181.77 KB / Downloads: 400)

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  [arduino code examples for T64M]-03 RS485 communication test
Posted by: admin - 04-20-2025, 07:37 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* RS485 Communication Test with Direction Control (SP3485EEN)
*
* This program is a simple test for RS485 communication using ESP32-S3.
* It will send a message over RS485 and then read incoming messages.
* The TXD pin is defined as GPIO 13, RXD is GPIO 21, and EN is GPIO 14.
*/

#include <HardwareSerial.h>

// Define RS485 pins
#define RS485_RXD 21     // RS485 Receive
#define RS485_TXD 13     // RS485 Transmit
#define RS485_EN  14     // RS485 Direction control (High: Send, Low: Receive)

// Create a hardware serial object on UART1
HardwareSerial rs485Serial(1);

void setup() {
  // Start serial communication for debugging
  Serial.begin(115200);
  while (!Serial);

  // Set RS485 direction control pin
  pinMode(RS485_EN, OUTPUT);
  digitalWrite(RS485_EN, LOW); // Start in receive mode

  // Initialize RS485 serial communication
  rs485Serial.begin(9600, SERIAL_8N1, RS485_RXD, RS485_TXD);

  Serial.println("RS485 Test Start (with direction control)");
}

void loop() {
  // Prepare the message to send
  String message = "Hello from KinCony T64M!";
 
  // Switch to transmit mode
  digitalWrite(RS485_EN, HIGH);
  delay(2); // Short delay to allow driver to switch
 
  // Send the message
  rs485Serial.println(message);
  rs485Serial.flush(); // Wait for transmission to complete
 
  // Switch back to receive mode
  digitalWrite(RS485_EN, LOW);
 
  Serial.println("Message sent. Waiting for response...");

  // Wait for a response (up to 1 second)
  unsigned long startTime = millis();
  while (millis() - startTime < 1000) {
    if (rs485Serial.available()) {
      String receivedMessage = "";
      while (rs485Serial.available()) {
        char c = rs485Serial.read();
        receivedMessage += c;
      }
      // Print the received message
      Serial.print("Received: ");
      Serial.println(receivedMessage);
      break;
    }
  }

  // Wait before sending the next message
  delay(2000);
}
arduino ino file download:

.zip   3-RS485-Test.zip (Size: 1.02 KB / Downloads: 423)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   3-RS485-Test.ino.merged.zip (Size: 186.66 KB / Downloads: 452)

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  [arduino code examples for T64M]-02 Read digital input ports state
Posted by: admin - 04-20-2025, 07:35 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* Description:
* This Arduino program reads the state of 64 input channels using 4 PCF8575 I/O expanders
* and prints the state of all input pins to the Serial Monitor. Each input state is printed
* in binary (0 = ON, 1 = OFF), grouped by 16 bits per chip.
*
* I2C Pin Definitions:
* - SDA: GPIO 12
* - SCL: GPIO 11
*
* PCF8575 Addresses:
* - Input  1~16 : 0x25
* - Input 17~32: 0x24
* - Input 33~48: 0x21
* - Input 49~64: 0x20
*/

#include <Wire.h>
#include <PCF8575.h>

// Define I2C pins
#define SDA_PIN 12
#define SCL_PIN 11

// Create PCF8575 objects
PCF8575 pcf_1(0x25); // Input  1-16
PCF8575 pcf_2(0x24); // Input 17-32
PCF8575 pcf_3(0x21); // Input 33-48
PCF8575 pcf_4(0x20); // Input 49-64

// Array of PCF8575 pointers
PCF8575* pcfArray[4] = { &pcf_1, &pcf_2, &pcf_3, &pcf_4 };

void setup() {
  Serial.begin(115200);
  Wire.begin(SDA_PIN, SCL_PIN); // Initialize I2C

  // Initialize each PCF8575
  for (int i = 0; i < 4; i++) {
    pcfArray[i]->begin();
  }

  Serial.println("KinCony F64 64 channel input state  0:ON  1:OFF");
}

void loop() {
  Serial.println("Reading Inputs...");

  for (int chip = 0; chip < 4; chip++) {
    uint16_t state = 0;

    // Read 16 input pins per PCF8575
    for (int pin = 0; pin < 16; pin++) {
      if (pcfArray[chip]->read(pin)) {
        state |= (1 << pin); // Bit = 1 means OFF (no signal), 0 means ON
      }
    }

    // Display result
    Serial.print("Input ");
    Serial.print(chip * 16 + 1);
    Serial.print("~");
    Serial.print((chip + 1) * 16);
    Serial.print(": ");
    for (int b = 15; b >= 0; b--) {
      Serial.print(bitRead(state, b));
    }
    Serial.println();
  }

  Serial.println(); // Blank line between readings
  delay(500);       // Wait 500ms before next read
}
arduino ino file download:

.zip   2-digital-input.zip (Size: 1.01 KB / Downloads: 407)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   2-digital-input.ino.merged.zip (Size: 192.41 KB / Downloads: 403)

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  [arduino code examples for T64M]-01 Turn ON/OFF OUTPUT
Posted by: admin - 04-20-2025, 07:34 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This program controls 64 outputs using 4 PCF8575 I/O expanders.
* It sequentially turns on outputs 1 to 64, then turns them off from 64 to 1, in a loop.
*
* I2C Pin Definitions:
* - SDA: GPIO 48
* - SCL: GPIO 47
*
* PCF8575 Addresses:
* - Output  1~16 : 0x25
* - Output 17~32: 0x24
* - Output 33~48: 0x21
* - Output 49~64: 0x20
*
* Delay Time:
* - 200 milliseconds between switching outputs
*/

#include <Wire.h>        // Include the Wire library for I2C communication
#include <PCF8575.h>     // Include the PCF8575 library

#define SDA_PIN 48       // Define SDA pin
#define SCL_PIN 47       // Define SCL pin
#define DELAY_TIME 200   // Delay between operations in milliseconds

// Create PCF8575 objects for each chip
PCF8575 pcf_1(0x25); // output  1-16
PCF8575 pcf_2(0x24); // output 17-32
PCF8575 pcf_3(0x21); // output 33-48
PCF8575 pcf_4(0x20); // output 49-64

// Array of pointers to PCF8575 objects
PCF8575* pcfArray[4] = { &pcf_1, &pcf_2, &pcf_3, &pcf_4 };

void setup() {
  Wire.begin(SDA_PIN, SCL_PIN);  // Initialize I2C with specified pins
  Serial.begin(115200);
  Serial.println("PCF8575 64-Channel Output Control Starting...");

  // Initialize all PCF8575 modules and set all pins to HIGH (OFF)
  for (int i = 0; i < 4; i++) {
    pcfArray[i]->begin();
    for (int j = 0; j < 16; j++) {
      pcfArray[i]->write(j, HIGH);  // Turn off all outputs initially
    }
  }
}

void loop() {
  // Turn ON outputs from 1 to 64 (LOW)
  for (int channel = 0; channel < 64; channel++) {
    int chipIndex = channel / 16;         // Which PCF8575 (0 to 3)
    int pinIndex = channel % 16;          // Which pin on that PCF8575 (0 to 15)
    pcfArray[chipIndex]->write(pinIndex, LOW); // Turn ON the output
    delay(DELAY_TIME);
  }

  // Turn OFF outputs from 64 to 1 (HIGH)
  for (int channel = 63; channel >= 0; channel--) {
    int chipIndex = channel / 16;
    int pinIndex = channel % 16;
    pcfArray[chipIndex]->write(pinIndex, HIGH); // Turn OFF the output
    delay(DELAY_TIME);
  }
}
arduino ino file download:

.zip   1-output.zip (Size: 1.03 KB / Downloads: 415)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   1-output.ino.merged.zip (Size: 192.12 KB / Downloads: 400)

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  T64M ESPHome yaml for home assistant
Posted by: admin - 04-20-2025, 07:32 AM - Forum: T64M - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This program reads 8 input states from a PCF8575 I/O expander and
* controls a corresponding 8-channel relay module. When an input pin
* is LOW, the corresponding relay is turned ON (LOW means ON for the relay).
*
* Pin Definitions:
* - SDA: GPIO 8
* - SCL: GPIO 18
* - PCF8575 I2C Address: 0x24
*/

#include <Wire.h>
#include <PCF8575.h>

// I2C pins
#define SDA 8
#define SCL 18

// PCF8575 I2C address
#define INPUT_I2C_ADDRESS 0x24   

// Create PCF8575 object
PCF8575 pcf8575_IN(INPUT_I2C_ADDRESS);

void setup() {
  // Initialize I2C communication
  Wire.begin(SDA, SCL);

  // Initialize serial communication
  Serial.begin(115200);
 
  // Initialize PCF8575
  pcf8575_IN.begin();

  // Turn off all relays first (assuming LOW activates the relay)
  for (int i = 8; i < 16; i++) {
    pcf8575_IN.write(i, HIGH);  // Set to HIGH to turn off the relay
  }

  Serial.println("System started: Input state controlling 8 relays");
}

void loop() {
  // Read 16-bit state from PCF8575
  uint16_t inputState = pcf8575_IN.read16();

  for (int i = 0; i < 8; i++) {
    bool state = bitRead(inputState, i); // Read digital input state

    Serial.print("DI");
    Serial.print(i + 1);
    Serial.print(" State: ");
    Serial.println(state ? "HIGH" : "LOW");

    // Control relay (LOW activates the relay)
    pcf8575_IN.write(8 + i, state ? HIGH : LOW);
  }

  Serial.println("---------------------");
  delay(500);
}
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.txt   T64M-HA.txt (Size: 23.77 KB / Downloads: 357)

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  T64M ESP32-S3 IO pins define
Posted by: admin - 04-20-2025, 07:30 AM - Forum: T64M - No Replies

Code:
analog A1 (0-5v): GPIO7
analog A2 (0-5v): GPIO6
analog A3 (4-20mA): GPIO5
analog A4 (4-20mA): GPIO4

-----------------
IIC Bus-1:

SDA:GPIO48
SCL:GPIO47

PCF8575:(output1-16): i2c address:0x25
PCF8575:(output17-32): i2c address:0x24
PCF8575:(output33-48): i2c address:0x21
PCF8575:(output49-64): i2c address:0x20

24C02 EPROM i2c address: 0x50

------------------

IIC Bus-2:

SDA:GPIO12
SCL:GPIO11

PCF8575:(input1-16): i2c address:0x25
PCF8575:(input17-32): i2c address:0x24
PCF8575:(input33-48): i2c address:0x21
PCF8575:(input49-64): i2c address:0x20



-----------------

1-wire (pull-up resistance on PCB):
GPIO15
GPIO16
GPIO17
GPIO18

free GPIO:
GPIO8
GPIO9
GPIO10

-----------------

Ethernet (W5500) I/O define:

clk_pin: GPIO42
mosi_pin: GPIO43
miso_pin: GPIO44
cs_pin: GPIO41

interrupt_pin: GPIO2
reset_pin: GPIO1

--------------------
RS485:
RXD:GPIO21
TXD:GPIO13
EN:GPIO14
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