I need help with this serial communiction with 2 arduinos and to put 3 more sensors ultrassom

Projects Programming
1

/* SoftwareSerialExample_Sender
*/

#include <NewPing.h>
#include <HCSR04.h>
#include <SoftwareSerial.h>

#define SERIAL_RX 18
#define SERIAL_TX 19

#define ECHO_1 2
#define TRIG 3

SoftwareSerial mySerial(SERIAL_RX, SERIAL_TX);

int enviar;
long actMillis, antMillis=0;
int duration, distance;

void setup() {
pinMode(ECHO_1, INPUT);
pinMode(TRIG, OUTPUT);
Serial.begin(9600);
Serial.println("i send stuf");
mySerial.begin(4800);
}

void loop() {

digitalWrite(TRIG, HIGH);
delay(10);
digitalWrite(TRIG, LOW);
duration = pulseIn(ECHO_1, HIGH);
distance = (duration / 2) / 29.1;

actMillis = millis();
if(actMillis-antMillis>=1000){
antMillis = actMillis;
mySerial.print("Distancia: ");
mySerial.println(distance);
}
}

====================================================================================================================================================================================================================================================================================================================

//#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <SPI.h>
#include <RFID.h>
#include <Servo.h>

#include <SoftwareSerial.h>
#define SERIAL_RX 18
#define SERIAL_TX 19

SoftwareSerial mySerial(SERIAL_RX, SERIAL_TX);

//Prototipos
void blinkblink(int x);

RFID rfid(10, 9); //PIN10 on SDA. PIN 9 on RST
unsigned char status;
unsigned char str[MAX_LEN];
String accesso [1] = {"1171281215114"};
int accessGrantedSize = 1;

Servo lockServo;
Servo lockServoOut;
int lockPos = 0;
int unlockPos = 90;
boolean locked = true;
int lockPosOut = 10;
int unlockPosOut = 90;
boolean lockedOut = true;

int redLEDPin = 16;
int greenLEDPin = 15;

const byte ROWS = 4;
const byte COLS = 3;
char keys[ROWS][COLS] = {
{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'*','0','#'}, };
byte rowPins[ROWS] = {2, 3, 4, 5 };
byte colPins[COLS] = {6, 7, 8};
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS);

char receber;
String mensagerecibe;

void setup(){

pinMode(redLEDPin, OUTPUT);
pinMode(greenLEDPin, OUTPUT);

Serial.begin(9600);
Serial.println("show up card");

mySerial.begin(4800);

SPI.begin();
rfid.init();

//lcd.init;
//lcd.begin(16,2);

lockServo.attach(14);
lockServo.write(lockPos);

blinkblink(10);
}

void loop() {

if (mySerial.available()){
recibe = mySerial.read();
mensagerecibe = String(receber);
char mensage[mensagerecibe.length() + 1];
mensagerecibe.toCharArray(mensage, mensagerecibe.length() + 1);
Serial.print(mensage);
}

if (rfid.findCard(PICC_REQIDL, str) == MI_OK){

Serial.println("just the  card"); 
String temp = "";

if (rfid.anticoll(str) == MI_OK){ 
  Serial.print("The number of the card : "); 
  for (int i = 0; i < 4; i++){ 
    temp = temp + (0x0F & (str[i] >> 4)); 
    temp = temp + (0x0F & str[i]); 
} 
  
Serial.println("this is the variable ");
Serial.println (temp);
checkAccess (temp);     //Check if the identified tag is an allowed to open tag

}

rfid.selectTag(str); //Lock card to prevent a redundant read, removing the line will make the sketch read cards continually
}
rfid.halt();
}

void checkAccess(String temp){

boolean granted = false;
for (int i=0; i <= (accessGrantedSize-1); i++){

if(accesso[i] == temp){
  
  Serial.println("pin");
  granted = true;
  
  if (locked == true){
      
    String passe = "";
    for (int x = 0; x < 4; x++){
      
      char Key = keypad.waitForKey();
      passe = pass + Key;
     Serial.println(Key);  
       
    }
  Serial.println(pass);
  if(passe == "1234"){
    Serial.println(" CORRET");
    lockServo.write(unlockPos);
    locked = false;
    digitalWrite(greenLEDPin, HIGH);
    delay(200);

    
  }
  else{
    Serial.println("PIN INCORRET");
   
  }
  }
  else if (locked == false){
      lockServo.write(lockPos);
      locked = true;
  }

}
}

if (granted == false){

Serial.println ("Acess denim");
digitalWrite(redLEDPin, HIGH);     
delay(200);
digitalWrite(greenLEDPin, LOW);

}
}

void blinkblink(int x){
for(int i=0; i <= x; i++){
digitalWrite(redLEDPin, HIGH);
digitalWrite(greenLEDPin, LOW);
delay(100);
digitalWrite(redLEDPin, LOW);
digitalWrite(greenLEDPin, HIGH);
delay(100);
digitalWrite(redLEDPin, LOW);
digitalWrite(greenLEDPin, LOW);
}
}

2

I'm going to guess that the compiler barfed on that section.
Please remember to use code tags when posting code

3

One thing seems weird. You include libraries for the ultrasonic ranger and then don't use them, instead you address the HCSR-04 manually using pin I/O commands.

4

that it´s separate the 2 codes. One is sender the other is the recever

5

i made that way because i addapt you programm i search on the internet but if have a easier way to make tell me

6

What 'Arduino' boards are you using?
This tutorial covers send between arduinos via serial, Arduino to Arduino via Serial

7

i am using two arduinos unos

8

So you are using A4 and A5 pins for software serial. Did you cross them over Tx <-> Rx and Rx <-> Tx? i.e. A4 on one board goes to A5 on the other and visa versa.
I put a 1K resistor in each lead to protect against miss wiring Tx <-> Tx
Start with a simple echo program

// https://forum.arduino.cc/t/i-need-help-with-this-serial-communiction-with-2-arduinos-and-to-put-3-more-sensors-ultrassom/875806
// uno to uno
#include <SoftwareSerial.h>

#define SERIAL_RX 18
#define SERIAL_TX 19

SoftwareSerial mySerial(SERIAL_RX, SERIAL_TX);

void setup() {
  Serial.begin(115200);  // fast for debug
  for (int i = 10; i > 0; i--) {
    Serial.print(i); Serial.print(' ');
    delay(500);
  }
  Serial.println();
  mySerial.begin(4800);

}

void loop() {
  if (Serial.available()) {
    mySerial.write(Serial.read());
  }
  if (mySerial.available()) {
    Serial.write(mySerial.read());
  }
}

Open two (2) Arduino IDE instances and load that on both boards. Select one board for each IDE and then see that you can send data from the two serial monitor from one board to another.

10

but the code of the reciber still the same?

11

For the simple test code above you run the SAME code on both boards BUT using TWO open IDE windows (i.e. Start Arduino IDE twice)
Once that is running you can change stuff.