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  [arduino code examples for DM8]-06 How to use SD Card
Posted by: admin - 09-09-2025, 03:01 AM - Forum: DM8 - 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: 314)
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: 221.25 KB / Downloads: 303)

Print this item

  [arduino code examples for DM32]-06 How to use SD Card
Posted by: admin - 09-09-2025, 03:01 AM - Forum: DM32 - 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: 311)
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: 221.25 KB / Downloads: 313)

Print this item

  [arduino code examples for DM16]-05 Read free GPIO state
Posted by: admin - 09-09-2025, 03:00 AM - Forum: DM16 - 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 40
* - GPIO 7
* - GPIO 48
* - GPIO 47
* - GPIO 13
* - GPIO 14
* - GPIO 21
* - GPIO 0
*
* Hardware Requirements:
* - Connect the pins to appropriate devices or pull them to HIGH/LOW for testing
*/

#define GPIO_PIN_40 40
#define GPIO_PIN_7 7
#define GPIO_PIN_48 48
#define GPIO_PIN_47 47
#define GPIO_PIN_13 13
#define GPIO_PIN_14 14
#define GPIO_PIN_21 21
#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_40, INPUT);
  pinMode(GPIO_PIN_7, INPUT);
  pinMode(GPIO_PIN_48, INPUT);
  pinMode(GPIO_PIN_47, INPUT);
  pinMode(GPIO_PIN_13, INPUT);
  pinMode(GPIO_PIN_14, INPUT);
  pinMode(GPIO_PIN_21, 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_40);
  currentState[1] = digitalRead(GPIO_PIN_7);
  currentState[2] = digitalRead(GPIO_PIN_48);
  currentState[3] = digitalRead(GPIO_PIN_47);
  currentState[4] = digitalRead(GPIO_PIN_13);
  currentState[5] = digitalRead(GPIO_PIN_14);
  currentState[6] = digitalRead(GPIO_PIN_21);
  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_40 :
                   i == 1 ? GPIO_PIN_7 :
                   i == 2 ? GPIO_PIN_48 :
                   i == 3 ? GPIO_PIN_47 :
                   i == 4 ? GPIO_PIN_13 :
                   i == 5 ? GPIO_PIN_14 :
                   i == 6 ? GPIO_PIN_21 : 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   5-free-gpio-state.zip (Size: 1.04 KB / Downloads: 304)
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: 179.57 KB / Downloads: 284)

Print this item

  [arduino code examples for DM32]-05 Read free GPIO state
Posted by: admin - 09-09-2025, 03:00 AM - Forum: DM32 - 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 40
* - GPIO 7
* - GPIO 48
* - GPIO 47
* - GPIO 13
* - GPIO 14
* - GPIO 21
* - GPIO 0
*
* Hardware Requirements:
* - Connect the pins to appropriate devices or pull them to HIGH/LOW for testing
*/

#define GPIO_PIN_40 40
#define GPIO_PIN_7 7
#define GPIO_PIN_48 48
#define GPIO_PIN_47 47
#define GPIO_PIN_13 13
#define GPIO_PIN_14 14
#define GPIO_PIN_21 21
#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_40, INPUT);
  pinMode(GPIO_PIN_7, INPUT);
  pinMode(GPIO_PIN_48, INPUT);
  pinMode(GPIO_PIN_47, INPUT);
  pinMode(GPIO_PIN_13, INPUT);
  pinMode(GPIO_PIN_14, INPUT);
  pinMode(GPIO_PIN_21, 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_40);
  currentState[1] = digitalRead(GPIO_PIN_7);
  currentState[2] = digitalRead(GPIO_PIN_48);
  currentState[3] = digitalRead(GPIO_PIN_47);
  currentState[4] = digitalRead(GPIO_PIN_13);
  currentState[5] = digitalRead(GPIO_PIN_14);
  currentState[6] = digitalRead(GPIO_PIN_21);
  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_40 :
                   i == 1 ? GPIO_PIN_7 :
                   i == 2 ? GPIO_PIN_48 :
                   i == 3 ? GPIO_PIN_47 :
                   i == 4 ? GPIO_PIN_13 :
                   i == 5 ? GPIO_PIN_14 :
                   i == 6 ? GPIO_PIN_21 : 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   5-free-gpio-state.zip (Size: 1.04 KB / Downloads: 302)
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: 179.57 KB / Downloads: 296)

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  [arduino code examples for DM16]-04 RS485 communication test
Posted by: admin - 09-09-2025, 02:59 AM - Forum: DM16 - 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 B16!");

  // 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: 298)
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: 184.34 KB / Downloads: 352)

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  [arduino code examples for DM4]-04 RS485 communication test
Posted by: admin - 09-09-2025, 02:59 AM - Forum: DM4 - 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 B16!");

  // 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: 292)
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: 184.34 KB / Downloads: 347)

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  [arduino code examples for DM8]-04 RS485 communication test
Posted by: admin - 09-09-2025, 02:59 AM - Forum: DM8 - 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 B16!");

  // 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: 301)
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: 184.34 KB / Downloads: 341)

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  [arduino code examples for DM32]-04 RS485 communication test
Posted by: admin - 09-09-2025, 02:59 AM - Forum: DM32 - 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 B16!");

  // 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: 308)
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: 184.34 KB / Downloads: 356)

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  [arduino code examples for DM16]-03 Read ADS1115 analog input ports value
Posted by: admin - 09-09-2025, 02:53 AM - Forum: DM16 - 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: 281)
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: 190.05 KB / Downloads: 293)

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  [arduino code examples for DM4]-03 Read ADS1115 analog input ports value
Posted by: admin - 09-09-2025, 02:53 AM - Forum: DM4 - 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: 295)
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: 190.05 KB / Downloads: 335)

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