Styjun

I am trying to make a remote controller that controls a car that I built. It works but whenever I turn the joystick on the controller, there is a 1 - 5 second delay between my turning the joystick and the car turning. PLease help remove the delay.

I am using two arduino mega 2560's (one for the controller and one for the car.

433hz wireless transmitter + receiver.

micro servo

TRANSMITTER CODE

#include <Servo.h>
// Include RadioHead Amplitude Shift Keying Library
#include <RH_ASK.h>
// Include dependant SPI Library 
#include <SPI.h> 
#define GROUND_JOY_PIN A3 
#define VOUT_JOY_PIN A2 
#define XJOY_PIN A1 
#define YJOY_PIN A0
Servo myservo;
RH_ASK rf_driver;

String str_joyX;
String str_joyY;
String xy;
int joyX1;
int joyY1;
int joyX;
int joyY;

void setup()

 Serial.begin(9600);
 pinMode(VOUT_JOY_PIN, OUTPUT) ; //pin A3 shall be used as output
 pinMode(GROUND_JOY_PIN, OUTPUT) ; //pin A2 shall be used as output
 digitalWrite(VOUT_JOY_PIN, HIGH) ; //set pin A3 to high (+5V)
 digitalWrite(GROUND_JOY_PIN,LOW) ; //set pin A3 to low (ground)
 myservo.attach(22);

 // Initialize ASK Object
 rf_driver.init();


void loop()
 

 joyY1 = analogRead(YJOY_PIN); 
 joyX1 = analogRead(XJOY_PIN);
 joyY = ((joyY1+520)/25);
 joyX = ((joyX1+520)/25);
 //Serial.println("Joy X:");
 //Serial.println(joyX);
 //Serial.println("Joy Y:");
 //Serial.println(joyY);
 //Serial.println("");
 str_joyX = String(joyX);
 str_joyY = String(joyY);
 xy = str_joyX + "," + str_joyY;
 char *msg = xy.c_str();
 rf_driver.send((uint8_t *)msg, strlen(msg));
 rf_driver.waitPacketSent();
 delay(10);

RECEIVER CODE

#include <Servo.h>
// Include RadioHead Amplitude Shift Keying Library
#include <RH_ASK.h>
// Include dependant SPI Library 
#include <SPI.h> 
#define SERVO_PIN 22
 //X axis reading from joystick will go into analog pin A1
Servo myservo;
String str_joyX;
String str_joyY;
String xy;
int joyX;
int joyY;
// Create Amplitude Shift Keying Object
RH_ASK rf_driver;

void setup()

 // Initialize ASK Object
 rf_driver.init();
 Serial.begin(9600);
 myservo.attach(22);


void loop()
 

 uint8_t buf[RH_ASK_MAX_MESSAGE_LEN];
 uint8_t buflen = sizeof(buf);
 // Check if received packet is correct size
 if (rf_driver.recv(buf, &buflen))
 xy = String((char*)buf);
 for (int i = 0; i < xy.length(); i++) 
 if (xy.substring(i, i+1) == ",") 
 str_joyX = xy.substring(0, i);
 str_joyY = xy.substring(i+1);

 joyX = str_joyX.toInt();
 joyY = str_joyY.toInt();
 //Serial.println("Joy X:");
 //Serial.println(joyX);
 //Serial.println("Joy Y:");
 //Serial.println(joyY);
 //Serial.println(""); 
 myservo.write(joyX); 
 delay(10);