use MAX485 TTL to RS485 Converter Module with esp32 to get convert value of rs485 output to serial
need help related to using - use MAX485 TTL to RS485 Converter Module with esp32 to get convert value of rs485 output to serial and print it on serial port
Solution:Jump to solution
I guess you'll find the details about addressing scheme or the format of the data packets, including how to address specific devices (slaves) on the bus. So that you can write code for esp32 to read flow meter data.
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i have a instrument with pinouts - rx,tx,com
code -
#include <HardwareSerial.h>
#define DE_PIN 2 // GPIO pin connected to DE (Data Enable) and RE (Receiver Enable) pins of MAX485
#define RS485_SERIAL Serial2 // Define the Serial port used for RS485 communication
void setup() {
Serial.begin(9600); // Initialize serial monitor
RS485_SERIAL.begin(9600); // Initialize RS485 serial communication
pinMode(DE_PIN, OUTPUT); // Set DE pin as output
}
void loop() {
digitalWrite(DE_PIN, HIGH); // Enable transmission mode
if (RS485_SERIAL.available()) { // If data is available on RS485 port
while (RS485_SERIAL.available()) { // Read all available data
char c = RS485_SERIAL.read(); // Read character
Serial.print(c); // Print character to serial monitor
}
}
digitalWrite(DE_PIN, LOW); // Disable transmission mode
delay(100); // Delay before checking for new data
}
Hi @accur4te If you don't mind could you tell us the exact instrument that you're trying to interface with ESP32 over RS485? Because you may need a salve ID/commands to communicate with the master microcontroller.
its a flow meter
Solution
I guess you'll find the details about addressing scheme or the format of the data packets, including how to address specific devices (slaves) on the bus. So that you can write code for esp32 to read flow meter data.
Okay I will give it a try
can you tell how can i get started with it , i am confused about how should i do it.
Your code doesn't show any handling for the RE try apply the logic in your code if it doesn't work then check the wiring if it's done properly
Okay got it