I am trying to use a rs485 with nodemcu. Im using max485 module to connect it.but in my code modbus.begin() could not run and it is giving me error of invalid conversion from int to serialmode -fpermissive. why is that ?
this is my code
#include <SPI.h>
#include <Wire.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "DFRobot_EC.h"
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
#define TROUBLESHOOT
#define RX 3 //pin 1 MAX485
#define RE 15 //pin 2&3 MAX485
#define TX 1 //pin 4 MAX485
#define modbus Serial1
uint8_t test=0,counter,crc_l,crc_h,address[20];
uint16_t crc, ec, ecCal;
uint32_t i,j,data,timer1;
String message;
void setup()
{
Serial.begin(115200);
modbus.begin(9600,SERIAL_8N1,RX,TX);
pinMode(RE,OUTPUT);
digitalWrite(RE,LOW);
lcd.init();
lcd.backlight();
lcd.setCursor(0,0);
lcd.print("EC SENSOR MODBUS");
Serial.begin(115200);
Serial.println("EC SENSOR MODBUS");
delay(1000);
lcd.clear();
}
void loop()
{
if(millis()-timer1>=1000)
{
timer1=millis();
Modbus_request(0x01,0x03,0x00,0x02);
}
if(modbus.available())
{
i=0;
while(modbus.available()) address[i++]=modbus.read();
while(address[0]==0)
{
for(j=0;j<i;j++) address[j]=address[j+1];
i--;
}
#if defined (TROUBLESHOOT)
if(i>1)
{
for(j=0;j<i;j++)
{
if(address[j]<0x10) Serial.print("0");
Serial.print(address[j],HEX);
Serial.print(" ");
}
Serial.println();
}
#endif
if(i>2)
{
crc=CRC16(i-2);
crc_l=crc&0xFF;
crc_h=(crc>>8)&0xFF;
}
if((address[i-2]==crc_l)&(address[i-1]==crc_h))
{
ecCal=256*address[3]+address[4];
ec=256*address[5]+address[6];
Serial.println("Calibration Value=" + String(ecCal) +"us/cm EC Value=" + String(ec) + "us/cm");
}
}
lcd.setCursor(7,1);
lcd.print(" ");
lcd.setCursor(7,2);
lcd.print(" ");
lcd.setCursor(0,0);
lcd.print("Calibration Value=" + String(ecCal) +"us/cm EC Value=" + String(ec) + "us/cm");
}
void Modbus_request(unsigned char id,unsigned char code,unsigned int addr,unsigned int quantity)
{
address[0]=id;
address[1]=code;
address[2]=addr>>8;
address[3]=addr;
address[4]=quantity>>8;
address[5]=quantity;
crc=CRC16(6);
address[6]=crc&0xFF;
address[7]=(crc>>8)&0xFF;
#if defined (TROUBLESHOOT)
for(i=0;i<8;i++)
{
if(address[i]<0x10) Serial.print("0");
Serial.print(address[i],HEX);
Serial.print(" ");
}
Serial.println();
#endif
digitalWrite(RE,HIGH);
delay(10);
for(i=0;i<8;i++) modbus.write(address[i]);
delay(10);
digitalWrite(RE,LOW);
}
int CRC16(int DataLength)
{
unsigned int i,j,CheckSum;
CheckSum=0xFFFF;
for (j=0;j<DataLength;j++){
CheckSum=CheckSum^address[j];
for(i=0;i<8;i++){
if((CheckSum)&0x0001==1) CheckSum=(CheckSum>>1)^0xA001;
else CheckSum=CheckSum>>1;}}
return CheckSum;
}
and this is my error message :
Arduino: 1.8.13 (Windows 10), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA:~1019KB), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200"
WARNING: library LiquidCrystal_I2C claims to run on avr architecture(s) and may be incompatible with your current board which runs on esp8266 architecture(s).
C:\Users\LENOVO\OneDrive\Documents\Arduino\ecnewww\ecnewww.ino: In function 'void setup()':
ecnewww:29:37: error: invalid conversion from 'int' to 'SerialMode' [-fpermissive]
modbus.begin(9600,SERIAL_8N1,RX,TX);
^
In file included from C:\Users\LENOVO\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266/Arduino.h:245:0,
from sketch\ecnewww.ino.cpp:1:
C:\Users\LENOVO\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266/HardwareSerial.h:87:10: error: initializing argument 3 of 'void HardwareSerial::begin(long unsigned int, SerialConfig, SerialMode, uint8_t)' [-fpermissive]
void begin(unsigned long baud, SerialConfig config, SerialMode mode, uint8_t tx_pin)
^
exit status 1
invalid conversion from 'int' to 'SerialMode' [-fpermissive]
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
