ผมไม่เข้าใจเลยคับคือ กดใช้ joy stick ใน blynk เเละ blynk สามารถคุมรอบของมอเตอร์ได้เเละส่งให้ esp8266 v3 เเล้วส่งค่าให้ arduino mega ทำให้ motor drive เเละมอเตอทำงาน
นี้ของโค้ด esp8266
`#define BLYNK_PRINT Serial`
#include <SimpleTimer.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SoftwareSerial.h>
int pinValue1;
int pinValue2;
int pinValue3;
int pinValue4;
String v2arduino;
//SoftwareSerial esp(5, 4); /** rx,tx(GPIO 5 (D1),GPIO 4 (D2))*/
char auth[] = "hAHI2oi9eShQrBQ6NbpGBm_SAEeWQij2";
char ssid[] = "Mennoy";
char pass[] = "25442544";
char server[] = "oasiskit.com";
SimpleTimer timer;
String myString;
char rdata;
int firstVal, secondVal, thirdVal;
void setup() {
Serial.begin(9600);
//esp.begin(115200);
Blynk.begin(auth, ssid, pass, "oasiskit.com", 8080);
}
void loop()
{
if (Serial.available() == 0 ) {
Blynk.run();
timer.run(); // Initiates BlynkTimer
toarduino();
}
if (Serial.available() > 0 )
{
rdata = Serial.read();
myString = myString + rdata;
// Serial.print(rdata);
if ( rdata == '\n')
{
// new code
String l = getValue(myString, ',', 0);
String m = getValue(myString, ',', 1);
String n = getValue(myString, ',', 2);
firstVal = l.toInt();
secondVal = m.toInt();
thirdVal = n.toInt();
myString = "";
// end new code
}
}
}
String getValue(String data, char separator, int index)
{
int found = 0;
int strIndex[] = { 0, -1 };
int maxIndex = data.length() - 1;
for (int i = 0; i <= maxIndex && found <= index; i++) {
if (data.charAt(i) == separator || i == maxIndex) {
found++;
strIndex[0] = strIndex[1] + 1;
strIndex[1] = (i == maxIndex) ? i + 1 : i;
}
}
return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}
// in Blynk app writes values to the Virtual Pin V3
BLYNK_WRITE(V10)
{
pinValue1 = param.asInt(); // assigning incoming value from pin V10 to a variable
}
// in Blynk app writes values to the Virtual Pin V4
BLYNK_WRITE(V11)
{
pinValue2 = param.asInt(); // assigning incoming value from pin V10 to a variable
}
// in Blynk app writes values to the Virtual Pin V5, this is for the slider
BLYNK_WRITE(V12)
{
pinValue3 = param.asInt(); // assigning incoming value from pin V10 to a variable
}
void toarduino()
{
v2arduino = v2arduino + pinValue1 + "," + pinValue2 + "," + pinValue3;
Serial.println(v2arduino);
delay(100);
v2arduino = "";
}
เเละนี้โค้ดของ arduino คับ
#include <SoftwareSerial.h>
/**
RX = 2
TX = 3
*/
SoftwareSerial nodemcu(2,3);
long int data;
int firstVal, secondVal, thirdVal;
String myString; // complete message from arduino, which consistors of snesors data
char rdata; // received charactors
String cdata; // complete data
int ena = 5;
int enb = 6;
int in1 = 8;
int in2 = 9;
int in3 = 10;
int in4 = 11;
void setup() {
Serial.begin(9600);
nodemcu.begin(9600);
pinMode(ena, OUTPUT);
pinMode(enb, OUTPUT);
pinMode(in1, OUTPUT);
pinMode(in2, OUTPUT);
pinMode(in3, OUTPUT);
pinMode(in4, OUTPUT);
analogWrite(ena, 0);
analogWrite(enb, 0);
}
void loop() {
if (nodemcu.available() == 0 )
{
delay(100); // 100 milli seconds
}
if ( nodemcu.available() > 0 )
{
rdata = nodemcu.read();
myString = myString + rdata;
Serial.print(rdata);
if ( rdata == '\n')
{
Serial.println(myString);
// new code
String l = getValue(myString, ',', 0);
String m = getValue(myString, ',', 1);
String n = getValue(myString, ',', 2);
firstVal = l.toInt(); // for left and right
secondVal = m.toInt(); // forward and reverse
thirdVal = n.toInt(); // speed
myString = "";
if ( (firstVal == 2) && (secondVal == 2) ) // for joystic normal position
{
analogWrite(ena, 0);
analogWrite(enb, 0);
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in3, LOW);
} else
if ( (firstVal == 2) && (secondVal > 3) ) // Forward direction
{
analogWrite(ena, thirdVal);
analogWrite(enb, thirdVal);
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
} else
if ( (firstVal == 2) && (secondVal < 1) ) // reverse direction
{
analogWrite(ena, thirdVal);
analogWrite(enb, thirdVal);
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
} else
if ( (firstVal > 3) && (secondVal == 2) ) // Right
{
analogWrite(ena, thirdVal);
analogWrite(enb, thirdVal);
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
} else
if ( (firstVal < 1) && (secondVal == 2) ) // left
{
analogWrite(ena, thirdVal);
analogWrite(enb, thirdVal);
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
}
}
}
}
String getValue(String data, char separator, int index)
{
int found = 0;
int strIndex[] = { 0, -1 };
int maxIndex = data.length() - 1;
for (int i = 0; i <= maxIndex && found <= index; i++) {
if (data.charAt(i) == separator || i == maxIndex) {
found++;
strIndex[0] = strIndex[1] + 1;
strIndex[1] = (i == maxIndex) ? i + 1 : i;
}
}
return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}`Preformatted text`
