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  [arduino code examples for B8]-09 how to communication with Tuya WiFi module
Posted by: admin - 06-23-2025, 04:58 AM - Forum: B8 - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This Arduino program implements communication between ESP32 and the Tuya module
* via UART (serial communication). It listens for specific packets from the Tuya module
* and responds according to the predefined commands.
*
* Functionality:
* 1. When the ESP32 receives a heartbeat packet (55 AA 00 00 00 00 FF),
*    it sends a heartbeat response (55 AA 03 00 00 01 00 03).
* 2. When the ESP32 receives a product information request (55 AA 00 01 00 00 00),
*    it sends a product information response (55 AA 03 01 ...).
* 3. When the ESP32 receives a work mode request (55 AA 00 02 00 00 01),
*    it sends a work mode response (55 AA 03 02 00 03 10 1C 14 47).
* 4. When the ESP32 receives a network status request (55 AA 00 03 00 01 00 03),
*    it sends a network status response (55 AA 03 03 00 00 05).
* 5. Subsequent heartbeat packets (55 AA 00 00 00 00 FF) are responded to with
*    (55 AA 03 00 00 01 01 04).
*/

#include <HardwareSerial.h>

// Create a HardwareSerial object for UART communication on ESP32
HardwareSerial tuyaSerial(1);

// Define the GPIO pins for TXD and RXD used for serial communication
#define TXD_PIN 16
#define RXD_PIN 17

// Set the baud rate for Tuya module communication to 9600
#define BAUD_RATE 9600

// Define the response packets for different commands from the Tuya module

// Heartbeat response: 55 AA 03 00 00 01 00 03
uint8_t heartBeatResponse[] = {0x55, 0xAA, 0x03, 0x00, 0x00, 0x01, 0x00, 0x03};

// Product info response with a detailed payload (e.g., firmware version, product name, etc.)
uint8_t productInfoResponse[] = {
  0x55, 0xAA, 0x03, 0x01, 0x00, 0x2A, 0x7B, 0x22, 0x70, 0x22, 0x3A, 0x22,
  0x63, 0x68, 0x6D, 0x7A, 0x6C, 0x67, 0x6A, 0x70, 0x61, 0x64, 0x70, 0x71,
  0x78, 0x64, 0x6B, 0x6F, 0x22, 0x2C, 0x22, 0x76, 0x22, 0x3A, 0x22, 0x31,
  0x2E, 0x30, 0x2E, 0x30, 0x22, 0x2C, 0x22, 0x6D, 0x22, 0x3A, 0x30, 0x7D, 0xAA
};

// Work mode response: 55 AA 03 02 00 03 10 1C 14 47
uint8_t workModeResponse[] = {0x55, 0xAA, 0x03, 0x02, 0x00, 0x03, 0x10, 0x1C, 0x14, 0x47};

// Network status response: 55 AA 03 03 00 00 05
uint8_t netStatusResponse[] = {0x55, 0xAA, 0x03, 0x03, 0x00, 0x00, 0x05};

// Subsequent heartbeat response: 55 AA 03 00 00 01 01 04
uint8_t secondHeartBeatResponse[] = {0x55, 0xAA, 0x03, 0x00, 0x00, 0x01, 0x01, 0x04};

void setup() {
  // Initialize the serial communication for debugging at 115200 baud rate
  Serial.begin(115200);

  // Initialize the serial communication with Tuya module at 9600 baud rate
  tuyaSerial.begin(BAUD_RATE, SERIAL_8N1, RXD_PIN, TXD_PIN);

  // Debug message to indicate that the serial communication has been initialized
  Serial.println("ESP32-Tuya serial communication initialized.");
}

void loop() {
  // Check if data is available from the Tuya module
  if (tuyaSerial.available()) {
    uint8_t incomingPacket[7];  // Array to store the received packet
    size_t bytesRead = tuyaSerial.readBytes(incomingPacket, 7); // Read 7 bytes from Tuya

    // Check if the packet has a valid header (0x55, 0xAA)
    if (bytesRead >= 2 && incomingPacket[0] == 0x55 && incomingPacket[1] == 0xAA) {
      // If less than 7 bytes were received, wait for more data
      if (bytesRead < 7) {
        Serial.println("Incomplete packet received. Waiting for remaining bytes...");
        delay(50); // Delay to allow more data to be received
        while (tuyaSerial.available()) {
          incomingPacket[bytesRead++] = tuyaSerial.read(); // Continue reading remaining bytes
          if (bytesRead >= 7) break;
        }
      }

      // If still less than 7 bytes, discard the incomplete packet
      if (bytesRead < 7) {
        Serial.println("Error: Incomplete packet discarded.");
        return;
      }

      // Debug: Print the received packet for logging
      Serial.print("Received packet: ");
      for (size_t i = 0; i < 7; i++) {
        Serial.print(incomingPacket[i], HEX);
        Serial.print(" ");
      }
      Serial.println();

      // Call the function to process the received packet
      processTuyaPacket(incomingPacket, 7);

    } else {
      // If the header is invalid, discard the packet and flush the buffer
      Serial.print("Error: Invalid packet header. Data received: ");
      for (size_t i = 0; i < bytesRead; i++) {
        Serial.print(incomingPacket[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      tuyaSerial.flush(); // Clear the serial buffer
    }
  }

  // Delay to avoid CPU overuse
  delay(100);
}

// Function to process the received packet and send the appropriate response
void processTuyaPacket(uint8_t* packet, size_t size) {
  // Ensure the packet size is 7 and the header is valid
  if (size == 7 && packet[0] == 0x55 && packet[1] == 0xAA) {
    // Determine the command in the packet (packet[2])
    switch(packet[2]) {
      case 0x00:
        if (packet[3] == 0x00 && packet[4] == 0x00 && packet[5] == 0x00 && packet[6] == 0xFF) {
          Serial.println("Heartbeat received.");
          sendPacket(heartBeatResponse, sizeof(heartBeatResponse));
        } else if (packet[3] == 0x01 && packet[4] == 0x00 && packet[5] == 0x00 && packet[6] == 0x00) {
          Serial.println("Product info request received.");
          sendPacket(productInfoResponse, sizeof(productInfoResponse));
        } else if (packet[3] == 0x02 && packet[4] == 0x00 && packet[5] == 0x00 && packet[6] == 0x01) {
          Serial.println("Work mode request received.");
          sendPacket(workModeResponse, sizeof(workModeResponse));
        } else if (packet[3] == 0x03 && packet[4] == 0x00 && packet[5] == 0x01 && packet[6] == 0x00) {
          Serial.println("Network status request received.");
          sendPacket(netStatusResponse, sizeof(netStatusResponse));
        }
        break;

      default:
        Serial.println("Error: Unhandled command received.");
        break;
    }
  }
}

// Function to send the response packet to the Tuya module
void sendPacket(uint8_t* packet, size_t size) {
  // Send the packet via UART to Tuya module
  tuyaSerial.write(packet, size);

  // Debug: Print the sent packet for logging
  Serial.print("Sent packet: ");
  for (size_t i = 0; i < size; i++) {
    Serial.print(packet[i], HEX);
    Serial.print(" ");
  }
  Serial.println();
}
arduino ino file download: 

.zip   9-tuya-wifi-config.zip (Size: 2 KB / Downloads: 419)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   9-tuya-wifi-config.ino.merged.zip (Size: 187.17 KB / Downloads: 432)

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  [arduino code examples for B8]-08 Ethernet W5500 chip work with TCP Server mode
Posted by: admin - 06-23-2025, 04:56 AM - Forum: B8 - 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  42
#define W5500_RST_PIN 44
#define W5500_INT_PIN 43
#define W5500_CLK_PIN 1
#define W5500_MOSI_PIN 2
#define W5500_MISO_PIN 41

// 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   8-Ethernet-W5500.zip (Size: 1.23 KB / Downloads: 408)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download: 

.zip   8-Ethernet-W5500.ino.merged.zip (Size: 191.06 KB / Downloads: 426)

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  [arduino code examples for B8]-07 how to DS3231 RTC clock
Posted by: admin - 06-23-2025, 04:54 AM - Forum: B8 - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* DS3231 RTC with Arduino
*
* This program demonstrates how to use the DS3231 RTC (Real-Time Clock) module with the Arduino.
* It includes functionality to:
* - Initialize the DS3231 RTC module
* - Read the current date and time from the RTC
* - Set the RTC time based on a serial command:Command format: DYYYY-MM-DDTHH:MM:SS
*    Set date and time command example: D2024-09-19T11:50:22
*    print current date and time command: current time
*
*
* Hardware Connections:
* - SDA: GPIO 8
* - SCL: GPIO 18
*/

#include <DS3231.h>
#include <Wire.h>

String serial_cmd_rcv = ""; // Serial port receiver

typedef struct
{
  byte year;    // Last two digits of the year, library adds 2000.
  byte month;
  byte day;
  byte hour;
  byte minute;
  byte second;
} MY_DATE_STR;

MY_DATE_STR my_date_str = {0};

// Define constants for relay control
#define OPEN_RLY_DATA    26
#define OPEN_RLY_MONTH   4
#define CLOSE_RLY_DATA   2
#define CLOSE_RLY_MONTH  5

// Define pin connections
#define SDA_PIN   8
#define SCL_PIN   18

DS3231 rtc; // Create an instance of the DS3231 RTC
bool h12Flag;
bool pmFlag;
static bool bCentury = false;
static bool old_level_high = false;
static bool old_level_low = false;


/**
* @brief Print the current time from the RTC to the Serial Monitor.
*/
static void PrintfCurTime()
{
  Serial.print("Current time is: ");
  int year = rtc.getYear() + 2000;
  Serial.print(year);
  Serial.print("-");

  Serial.print(rtc.getMonth(bCentury), DEC);
  Serial.print("-");

  Serial.print(rtc.getDate(), DEC);
  Serial.print(" ");

  Serial.print(rtc.getHour(h12Flag, pmFlag), DEC);
  Serial.print(":");
  Serial.print(rtc.getMinute(), DEC);
  Serial.print(":");
  Serial.println(rtc.getSecond(), DEC);
}

/**
* @brief Process serial commands to set the RTC time.
* Command format: DYYYY-MM-DDTHH:MM:SS
*/
static void GetSerialCmd()
{
  if (Serial.available() > 0)
  {
    delay(100);
    int num_read = Serial.available();
    while (num_read--)
      serial_cmd_rcv += char(Serial.read());
  }
  else return;

  serial_cmd_rcv.trim();

  if (serial_cmd_rcv == "current time")
  {
    PrintfCurTime();
    serial_cmd_rcv = "";
    return;
  }

  Serial.print("Received length: ");
  Serial.println(serial_cmd_rcv.length());

  int indexof_d = serial_cmd_rcv.indexOf('D');
  int indexof_t = serial_cmd_rcv.indexOf('T');

  Serial.print("D index: ");
  Serial.print(indexof_d);
  Serial.print(" T index: ");
  Serial.println(indexof_t);

  if (serial_cmd_rcv.length() != 20 ||
      serial_cmd_rcv.substring(0, 1) != "D" ||
      serial_cmd_rcv.substring(11, 12) != "T") 
  {
    Serial.println(serial_cmd_rcv);
    serial_cmd_rcv = "";
    return;
  }

  Serial.println("Setting time...");

  my_date_str.year = (byte)serial_cmd_rcv.substring(3, 5).toInt();
  my_date_str.month = (byte)serial_cmd_rcv.substring(6, 8).toInt();
  my_date_str.day = (byte)serial_cmd_rcv.substring(9, 11).toInt();
  my_date_str.hour = (byte)serial_cmd_rcv.substring(12, 14).toInt();
  my_date_str.minute = (byte)serial_cmd_rcv.substring(15, 17).toInt();
  my_date_str.second = (byte)serial_cmd_rcv.substring(18).toInt();

  rtc.setYear(my_date_str.year);
  rtc.setMonth(my_date_str.month);
  rtc.setDate(my_date_str.day);
  rtc.setHour(my_date_str.hour);
  rtc.setMinute(my_date_str.minute);
  rtc.setSecond(my_date_str.second);

  serial_cmd_rcv = "";

  Serial.println("Time set.");
}

void setup() {
  // Initialize the I2C interface
  Wire.begin(SDA_PIN, SCL_PIN, 40000);
 
  // Initialize Serial communication
  Serial.begin(115200);
   
  // Set the RTC to 24-hour mode
  rtc.setClockMode(false); // 24-hour format

  // Print current time to Serial Monitor
  PrintfCurTime();

  // Clear any remaining serial data
  while (Serial.read() >= 0) {}
}

void loop() {
  // Process incoming serial commands
  GetSerialCmd();
  delay(1000); // Delay for 1 second
}
arduino ino file download: 

.zip   7-DS3231-RTC.zip (Size: 1.56 KB / Downloads: 377)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download: 

.zip   7-DS3231-RTC.ino.merged.zip (Size: 193.65 KB / Downloads: 390)

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  [arduino code examples for B8]-06 How to use SD Card
Posted by: admin - 06-23-2025, 04:53 AM - Forum: B8 - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* SD Card File Operations
*
* This program demonstrates basic file operations on an SD card using the ESP32.
* It includes functionality to:
* - Initialize and test the SD card
* - Read from, write to, append to, and delete files on the SD card
* - Measure file read and write performance
*
* Hardware Connections:
* - SCK: GPIO 11
* - MISO: GPIO 12
* - MOSI: GPIO 10
* - CS: GPIO 9
*/

#include "FS.h"
#include "SD.h"
#include "SPI.h"

// Pin definitions for SD card
#define SCK  11
#define MISO 12
#define MOSI 10
#define CS   9

/**
* @brief Reads the contents of a file from the SD card and prints it to the serial monitor.
*
* @param fs File system to use (in this case, SD).
* @param path Path of the file to read.
*/
void readFile(fs::FS &fs, const char * path) {
  Serial.printf("Reading file: %s\n", path);

  File file = fs.open(path);
  if (!file) {
    Serial.println("Failed to open file for reading");
    return;
  }

  Serial.print("Read from file: ");
  while (file.available()) {
    Serial.print((char)file.read());
  }
  file.close();
}

/**
* @brief Writes a message to a file on the SD card.
*
* @param fs File system to use (in this case, SD).
* @param path Path of the file to write.
* @param message Message to write to the file.
*/
void writeFile(fs::FS &fs, const char * path, const char * message) {
  Serial.printf("Writing file: %s\n", path);

  File file = fs.open(path, FILE_WRITE);
  if (!file) {
    Serial.println("Failed to open file for writing");
    return;
  }
  if (file.print(message)) {
    Serial.println("File written");
  } else {
    Serial.println("Write failed");
  }
  file.close();
}

/**
* @brief Appends a message to a file on the SD card.
*
* @param fs File system to use (in this case, SD).
* @param path Path of the file to append.
* @param message Message to append to the file.
*/
void appendFile(fs::FS &fs, const char * path, const char * message) {
  Serial.printf("Appending to file: %s\n", path);

  File file = fs.open(path, FILE_APPEND);
  if (!file) {
    Serial.println("Failed to open file for appending");
    return;
  }
  if (file.print(message)) {
    Serial.println("Message appended");
  } else {
    Serial.println("Append failed");
  }
  file.close();
}

/**
* @brief Deletes a file from the SD card.
*
* @param fs File system to use (in this case, SD).
* @param path Path of the file to delete.
*/
void deleteFile(fs::FS &fs, const char * path) {
  Serial.printf("Deleting file: %s\n", path);
  if (fs.remove(path)) {
    Serial.println("File deleted");
  } else {
    Serial.println("Delete failed");
  }
}

/**
* @brief Tests file read and write performance.
*
* @param fs File system to use (in this case, SD).
* @param path Path of the file to test.
*/
void testFileIO(fs::FS &fs, const char * path) {
  File file = fs.open(path);
  static uint8_t buf[512];
  size_t len = 0;
  uint32_t start = millis();
  uint32_t end = start;

  if (file) {
    len = file.size();
    size_t flen = len;
    start = millis();
    while (len) {
      size_t toRead = len;
      if (toRead > 512) {
        toRead = 512;
      }
      file.read(buf, toRead);
      len -= toRead;
    }
    end = millis() - start;
    Serial.printf("%u bytes read for %u ms\n", flen, end);
    file.close();
  } else {
    Serial.println("Failed to open file for reading");
  }

  file = fs.open(path, FILE_WRITE);
  if (!file) {
    Serial.println("Failed to open file for writing");
    return;
  }

  size_t i;
  start = millis();
  for (i = 0; i < 2048; i++) {
    file.write(buf, 512);
  }
  end = millis() - start;
  Serial.printf("%u bytes written for %u ms\n", 2048 * 512, end);
  file.close();
}

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
 
  // Initialize SPI and SD card
  SPIClass spi = SPIClass(HSPI);
  spi.begin(SCK, MISO, MOSI, CS);

  if (!SD.begin(CS, spi, 80000000)) {
    Serial.println("Card Mount Failed");
    return;
  }

  uint8_t cardType = SD.cardType();

  if (cardType == CARD_NONE) {
    Serial.println("No SD card attached");
    return;
  }

  Serial.print("SD Card Type: ");
  if (cardType == CARD_MMC) {
    Serial.println("MMC");
  } else if (cardType == CARD_SD) {
    Serial.println("SDSC");
  } else if (cardType == CARD_SDHC) {
    Serial.println("SDHC");
  } else {
    Serial.println("UNKNOWN");
  }

  uint64_t cardSize = SD.cardSize() / (1024 * 1024);
  Serial.printf("SD Card Size: %lluMB\n", cardSize);
  delay(2000);

  // Perform file operations
  deleteFile(SD, "/hello.txt");
  writeFile(SD, "/hello.txt", "Hello ");
  appendFile(SD, "/hello.txt", "World!\n");
  readFile(SD, "/hello.txt");
  testFileIO(SD, "/test.txt");
  Serial.printf("Total space: %lluMB\n", SD.totalBytes() / (1024 * 1024));
  Serial.printf("Used space: %lluMB\n", SD.usedBytes() / (1024 * 1024));
}

void loop() {
  // No operation in loop
}
arduino ino file download: 

.zip   6-SD.zip (Size: 1.53 KB / Downloads: 396)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download: 

.zip   6-SD.ino.merged.zip (Size: 219.15 KB / Downloads: 401)

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  [arduino code examples for B8]-05 Read free GPIO state
Posted by: admin - 06-23-2025, 04:48 AM - Forum: B8 - No Replies

Code:
/*
* ESP32 GPIO State Reader
* Reads the state of GPIO47, GPIO48, GPIO7, GPIO40, GPIO0, and GPIO5
* and prints the results to the serial monitor.
*
* Made by KinCony IoT: https://www.kincony.com
*/

#define GPIO_13  13
#define GPIO_40  40
#define GPIO_14  14
#define GPIO_48  48
#define GPIO_0   0
#define GPIO_47  47
#define GPIO_7  7
#define GPIO_21  21


void setup() {
    Serial.begin(115200); // Initialize serial communication at 115200 baud rate
   
    // Set GPIOs as input
    pinMode(GPIO_13, INPUT);
    pinMode(GPIO_40, INPUT);
    pinMode(GPIO_14, INPUT);
    pinMode(GPIO_48, INPUT);
    pinMode(GPIO_0, INPUT);
    pinMode(GPIO_47, INPUT);
    pinMode(GPIO_7, INPUT);
    pinMode(GPIO_21, INPUT);           
}

void loop() {
    // Read GPIO states
    int state_13 = digitalRead(GPIO_13);
    int state_40 = digitalRead(GPIO_40);
    int state_14  = digitalRead(GPIO_14);
    int state_48 = digitalRead(GPIO_48);
    int state_0  = digitalRead(GPIO_0);
    int state_47 = digitalRead(GPIO_47);
    int state_7 = digitalRead(GPIO_7);
    int state_21 = digitalRead(GPIO_21);

    // Print GPIO states to the serial monitor
    Serial.printf("GPIO13: %d, GPIO40: %d, GPIO14: %d, GPIO48: %d, GPIO0: %d, GPIO47: %d, GPIO7: %d, GPIO21: %d\n",
                  state_13, state_40, state_14, state_48, state_0, state_47, state_7, state_21);
   
    delay(1000); // Read GPIO states every second
}
arduino ino file download: 

.zip   5-free-gpio-state.zip (Size: 682 bytes / Downloads: 419)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   5-free-gpio-state.ino.merged.zip (Size: 181.54 KB / Downloads: 404)

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  [arduino code examples for B8]-04 RS485 communication test
Posted by: admin - 06-23-2025, 04:43 AM - Forum: B8 - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* RS485 Communication Test
*
* 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 18 and RXD pin is defined as GPIO 8.
*/

#include <HardwareSerial.h>

// Define RS485 pins
#define RS485_RXD 38
#define RS485_TXD 39

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

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

  // Initialize RS485 Serial communication
  rs485Serial.begin(9600, SERIAL_8N1, RS485_RXD, RS485_TXD);
 
  Serial.println("RS485 Test Start");
}

void loop() {
  // Send a test message
  rs485Serial.println("Hello from KinCony B8M!");

  // Wait for a short period
  delay(1000);

  // Check if data is available to read
  if (rs485Serial.available()) {
    String receivedMessage = "";
    while (rs485Serial.available()) {
      char c = rs485Serial.read();
      receivedMessage += c;
    }
    // Print the received message
    Serial.print("Received: ");
    Serial.println(receivedMessage);
  }

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

.zip   4-RS485-Test.zip (Size: 763 bytes / Downloads: 388)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download: 

.zip   4-RS485-Test.ino.merged.zip (Size: 186.52 KB / Downloads: 401)

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  [arduino code examples for B8]-03 Read ADS1115 analog input ports value
Posted by: admin - 06-23-2025, 04:40 AM - Forum: B8 - No Replies

Code:
/*
* This program reads voltage values from the ADS1115 analog-to-digital converter
* on all four channels (A0, A1, A2, A3) and prints the results through the serial port.
* The ADS1115 communicates via the I2C protocol. This version of the code includes
* the capability to specify custom SDA and SCL pins for I2C communication.
*
* Copyright: Made by KinCony IoT: https://www.kincony.com
*
*/

#include <Wire.h>                // Library for I2C communication
#include <DFRobot_ADS1115.h>     // Library for ADS1115 ADC module

// Define the I2C SDA and SCL pins for communication with ADS1115
#define SDA_PIN 8 
#define SCL_PIN 18 

// Initialize ADS1115 instance using the Wire library
DFRobot_ADS1115 ads(&Wire);

void setup(void)
{
    // Begin serial communication at a baud rate of 115200
    Serial.begin(115200);

    // Initialize the I2C bus using the defined SDA and SCL pins
    Wire.begin(SDA_PIN, SCL_PIN);

    // Set the I2C address for the ADS1115 (default: 0x49)
    ads.setAddr_ADS1115(ADS1115_IIC_ADDRESS0);   // Address is 0x49

    // Set the gain for the ADS1115 (2/3x gain allows for a maximum input voltage of 6.144V)
    ads.setGain(eGAIN_TWOTHIRDS);

    // Set the ADS1115 to operate in single-shot mode (each reading is a single conversion)
    ads.setMode(eMODE_SINGLE);

    // Set the sample rate to 128 samples per second (SPS)
    ads.setRate(eRATE_128);

    // Set the operational status mode to single-conversion start
    ads.setOSMode(eOSMODE_SINGLE);

    // Initialize the ADS1115 module
    ads.init();
}

void loop(void)
{
    // Check if the ADS1115 is properly connected and functioning
    if (ads.checkADS1115())
    {
        // Variables to store the voltage readings for each channel
        int16_t adc0, adc1, adc2, adc3;

        // Read the voltage from channel A0 and print the value
        adc0 = ads.readVoltage(0);
        Serial.print("A0:");
        Serial.print(adc0);
        Serial.print("mV,  ");    // Print the value in millivolts

        // Read the voltage from channel A1 and print the value
        adc1 = ads.readVoltage(1);
        Serial.print("A1:");
        Serial.print(adc1);
        Serial.print("mV,  ");    // Print the value in millivolts

        // Read the voltage from channel A2 and print the value
        adc2 = ads.readVoltage(2);
        Serial.print("A2:");
        Serial.print(adc2);
        Serial.print("mV,  ");    // Print the value in millivolts

        // Read the voltage from channel A3 and print the value
        adc3 = ads.readVoltage(3);
        Serial.print("A3:");
        Serial.print(adc3);
        Serial.println("mV");     // Print the value in millivolts and end the line
    }
    else
    {
        // If ADS1115 is not connected, print a message indicating disconnection
        Serial.println("ADS1115 Disconnected!");
    }

    // Wait for 1 second before the next loop iteration
    delay(1000);
}
arduino ino file download: 

.zip   3-ads1115_adc.zip (Size: 1.2 KB / Downloads: 383)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:

.zip   3-ads1115_adc.ino.merged.zip (Size: 192.69 KB / Downloads: 405)

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  [arduino code examples for B8]-02 Read digital input ports state
Posted by: admin - 06-23-2025, 04:36 AM - Forum: B8 - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* Description:
* This Arduino program reads the state of a 16-channel PCF8575 I/O expander
* and prints the state of all input pins to the Serial Monitor. The state of
* each pin is represented as a bit in a 16-bit value, where each bit corresponds
* to an input pin. The program prints the input state in binary format.
*
* Pin Definitions:
* - SDA: GPIO 8
* - SCL: GPIO 18
* - PCF8575 I2C Address: 0x22
*/

#include "Arduino.h"
#include "PCF8575.h"

// Define I2C pins
#define I2C_SDA 8  // Define SDA pin
#define I2C_SCL 18  // Define SCL pin

// Set I2C address
PCF8575 pcf8575_IN1(0x22); // The I2C address of the PCF8575

void setup() {
    Serial.begin(115200);

    // Initialize I2C communication
    Wire.begin(I2C_SDA, I2C_SCL); // Initialize I2C with defined SDA and SCL pins

    pcf8575_IN1.begin(); // Initialize the PCF8575

    Serial.println("KinCony B8M 8 channel input state 0:ON  1:OFF");
}

void loop() {
    uint16_t state = 0;

    // Read the state of each pin (assuming 16 pins)
    for (int pin = 0; pin < 8; pin++) {
        if (pcf8575_IN1.read(pin)) {
            state |= (1 << pin); // Set the bit for the active pin
        }
    }

    Serial.print("Input state: ");
    Serial.println(state, BIN); // Print the state of inputs in binary

    delay(500); // Delay 500ms
}
arduino ino file download:

.zip   2-digital-input.zip (Size: 837 bytes / Downloads: 384)
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: 192.29 KB / Downloads: 418)

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  [arduino code examples for B8]-01 Turn ON/OFF OUTPUT
Posted by: admin - 06-23-2025, 04:31 AM - Forum: B8 - No Replies

Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This program controls a 16-channel relay board via a PCF8575 I/O expander.
* It sequentially turns on each relay and then turns them off in a loop.
*
* Pin Definitions:
* - SDA: GPIO 8
* - SCL: GPIO 18
*
* Delay Time:
* - 200 milliseconds between switching relays
*/

#include <Wire.h>        // Include the Wire library for I2C communication
#include <PCF8575.h>     // Include the PCF8575 library to control the I/O expander

#define SDA 8           // Define the SDA pin
#define SCL 18          // Define the SCL pin
#define DELAY_TIME 200   // Define the delay time in milliseconds

// Set I2C address of the PCF8575 module
#define I2C_ADDRESS 0x22 // I2C address of the PCF8575 module

PCF8575 pcf8575_R1(I2C_ADDRESS); // Create a PCF8575 object with the specified I2C address

void setup() {
  // Initialize I2C communication
  Wire.begin(SDA, SCL); // SDA on GPIO 8, SCL on GPIO 18 (according to your board's configuration)
 
  // Initialize serial communication for debugging (optional)
  Serial.begin(115200);
  Serial.println("PCF8575 Relay Control: Starting...");

  // Initialize the PCF8575 module
  pcf8575_R1.begin();

  // Turn off all relays initially (set all pins HIGH)
  for (int i = 8; i < 16; i++) {
    pcf8575_R1.write(i, HIGH); // Set all relays to OFF (assuming HIGH means OFF for relays)
  }
}

void loop() {
  // Sequentially turn on each relay
  for (int i = 8; i < 16; i++) {
    pcf8575_R1.write(i, LOW);   // Turn on the relay at pin i (LOW means ON for the relay)
    delay(DELAY_TIME);          // Wait for DELAY_TIME milliseconds
  }

  // Sequentially turn off each relay
  for (int i = 8; i < 16; i++) {
    pcf8575_R1.write(i, HIGH);  // Turn off the relay at pin i (HIGH means OFF for the relay)
    delay(DELAY_TIME);          // Wait for DELAY_TIME milliseconds
  }
}
arduino ino file download:

.zip   1-output.zip (Size: 927 bytes / Downloads: 393)
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: 192.06 KB / Downloads: 390)

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  B8 ESPHome yaml for home assistant with tuya
Posted by: admin - 06-23-2025, 04:28 AM - Forum: B8 - No Replies

Code:
esphome:
  name: b8
  friendly_name: b8
  platformio_options:
    board_build.extra_flags:
      # WIFI_CONTROL_SELF_MODE = 0
      # WIFI_CONTROL_SELF_MODE = 1
      - "-DWIFI_CONTROL_SELF_MODE=1"
esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: arduino
   

external_components:
  - source:
      type: git
      url: https://github.com/hzkincony/esphome-tuya-wifi-mcu
      ref: v1.1.0

# Enable logging
# logger:
#   hardware_uart: USB_SERIAL_JTAG
# Enable Home Assistant API
api:
  encryption:
    key: "WeVOuL5oNhjXcfzXtTirlOwvtWvCD5yqIxd3oV4es1k="

ethernet:
  type: W5500
  clk_pin: GPIO1
  mosi_pin: GPIO2
  miso_pin: GPIO41
  cs_pin: GPIO42
  interrupt_pin: GPIO43
  reset_pin: GPIO44

i2c:
   - id: bus_a
     sda: 8
     scl: 18
     scan: true
     frequency: 400kHz

pcf8574:
  - id: 'pcf8574_hub_out_1'  # for output channel 0-7| input channel 8-15   
    i2c_id: bus_a
    address: 0x22
    pcf8575: true

uart:
  - id: uart_1    #RS485
    baud_rate: 9600
    debug:
      direction: BOTH
      dummy_receiver: true
      after:
        timeout: 10ms
    tx_pin: 39
    rx_pin: 38

  - id: tuya_mcu_uart
    tx_pin: GPIO16
    rx_pin: GPIO17
    baud_rate: 9600

tuya_wifi_mcu:
  # tuya mcu product id
  product_id: tugmdoiviinh13kv
  uart_id: tuya_mcu_uart
  wifi_reset_pin: 28
  wifi_led_pin: 16

switch:
  - platform: uart
    uart_id: uart_1
    name: "RS485 Button"
    data: [0x11, 0x22, 0x33, 0x44, 0x55]

  - platform: gpio
    name: "b8-output01"
    id: "b8_output01"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 8
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output1-tuya
    dp_id: 1
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output01"

  - platform: gpio
    name: "b8-output02"
    id: "b8_output02"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 9
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output2-tuya
    dp_id: 2
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output02"

  - platform: gpio
    name: "b8-output03"
    id: "b8_output03"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 10
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output3-tuya
    dp_id: 3
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output03"

  - platform: gpio
    name: "b8-output04"
    id: "b8_output04"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 11
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output4-tuya
    dp_id: 4
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output04"

  - platform: gpio
    name: "b8-output05"
    id: "b8_output05"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 12
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output5-tuya
    dp_id: 5
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output05"

  - platform: gpio
    name: "b8-output06"
    id: "b8_output06"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 13
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output6-tuya
    dp_id: 6
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output06"

  - platform: gpio
    name: "b8-output07"
    id: "b8_output07"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 14
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output7-tuya
    dp_id: 101
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output07"

  - platform: gpio
    name: "b8-output08"
    id: "b8_output08"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 15
      mode: OUTPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-output8-tuya
    dp_id: 102
    # hide from homeassistant ui
    internal: true
    # bind other switch, sync state
    bind_switch_id: "b8_output08"

binary_sensor:
  - platform: gpio
    name: "b8-input01"
    id: "b8_input01"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 0
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input1-tuya
    dp_id: 111
    bind_binary_sensor_id: b8_input01
    internal: true

  - platform: gpio
    name: "b8-input02"
    id: "b8_input02"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 1
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input2-tuya
    dp_id: 112
    bind_binary_sensor_id: b8_input02
    internal: true

  - platform: gpio
    name: "b8-input03"
    id: "b8_input03"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 2
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input3-tuya
    dp_id: 113
    bind_binary_sensor_id: b8_input03
    internal: true

  - platform: gpio
    name: "b8-input04"
    id: "b8_input04"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 3
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input4-tuya
    dp_id: 114
    bind_binary_sensor_id: b8_input04
    internal: true

  - platform: gpio
    name: "b8-input05"
    id: "b8_input05"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 4
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input5-tuya
    dp_id: 115
    bind_binary_sensor_id: b8_input05
    internal: true

  - platform: gpio
    name: "b8-input06"
    id: "b8_input06"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 5
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input6-tuya
    dp_id: 116
    bind_binary_sensor_id: b8_input06
    internal: true

  - platform: gpio
    name: "b8-input07"
    id: "b8_input07"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 6
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input7-tuya
    dp_id: 117
    bind_binary_sensor_id: b8_input07
    internal: true

  - platform: gpio
    name: "b8-input08"
    id: "b8_input08"
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 7
      mode: INPUT
      inverted: true
  - platform: tuya_wifi_mcu
    name: b8-input8-tuya
    dp_id: 118
    bind_binary_sensor_id: b8_input08
    internal: true

##pull-up resistance on PCB
  - platform: gpio
    name: "b8-W1-io47"
    pin:
      number: 47
      inverted: true

  - platform: gpio
    name: "b8-W1-io48"
    pin:
      number: 48
      inverted: true

  - platform: gpio
    name: "b8-W1-io7"
    pin:
      number: 7
      inverted: true

  - platform: gpio
    name: "b8-W1-io40"
    pin:
      number: 40
      inverted: true
## without resistance on PCB
  - platform: gpio
    name: "b8-13"
    pin:
      number: 13
      inverted:  false
  - platform: gpio
    name: "b8-14"
    pin:
      number: 14
      inverted:  false
  - platform: gpio
    name: "b8-21"
    pin:
      number: 21
      inverted:  false
  - platform: gpio
    name: "b8-0"
    pin:
      number: 0
      inverted:  false

ads1115:
  - address: 0x48
sensor:
  - platform: ads1115
    multiplexer: 'A0_GND'
    gain: 6.144
    resolution: 16_BITS
    name: "ADS1115 Channel A0-GND"
    update_interval: 5s
  - platform: ads1115
    multiplexer: 'A1_GND'
    gain: 6.144
    name: "ADS1115 Channel A1-GND"
    update_interval: 5s
  - platform: ads1115
    multiplexer: 'A2_GND'
    gain: 6.144
    name: "ADS1115 Channel A2-GND"
    update_interval: 5s
  - platform: ads1115
    multiplexer: 'A3_GND'
    gain: 6.144
    name: "ADS1115 Channel A3-GND"
    update_interval: 5s

web_server:
  port: 80

font:
  - file: "gfonts://Roboto"
    id: roboto
    size: 20

display:
  - platform: ssd1306_i2c
    i2c_id: bus_a
    model: "SSD1306 128x64"
    address: 0x3C
    lambda: |-
      it.printf(0, 0, id(roboto), "KinCony b8");
download yaml file:

.txt   B8-HA.txt (Size: 8.35 KB / Downloads: 318)

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