09-27-2024, 02:26 AM
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 8
#define RS485_TXD 18
// 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 F16!");
// 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);
}
4-RS485-Test.zip (Size: 762 bytes / Downloads: 30)
BIN file (you can use esp32 download tool download to ESP32-S3 with address 0x0 then directly to use) download:
4-RS485-Test.ino.merged.zip (Size: 184.53 KB / Downloads: 26)