Why not compile?

Issues and Errors
1

look my picture?

Pasted image500×600 16.8 KB 

#include <SoftwareSerial.h>
SoftwareSerial SwSerial(2, 3); // RX, TX
#define BLYNK_PRINT SwSerial
#include <BlynkSimpleSerial.h>
#include <SimpleTimer.h>
SimpleTimer timer;
int solartrackerr = A4;
char auth[] = "94c55609544c48c7af09804704d48094";
int temp1,value,volt,luxs;
int ldrrd = A3;
float volts;
void readSolarCell()
    {
      float solartracker = analogRead(solartrackerr);
      float lux = analogRead(ldrrd);
      Blynk.virtualWrite(V20, volts);
      Blynk.virtualWrite(V7, luxs);
      BLYNK_LOG("myBMP180 %8.1f %8.1f", solartracker);
    }
void setup() 
{
Serial.begin(9600);
timer.setInterval(1000, readSolarCell);
timer.setInterval(1000L, sendUptime);
Blynk.begin(auth, IPAddress(192,168,1,3), 8831);
pinMode(solartrackerr, INPUT);
pinMode(ldrrd, INPUT);
}
void sendUptime()
{
  Blynk.virtualWrite(V22, millis() /1000);
}
void loop() {

temp1=analogRead(solartrackerr);
volts= (temp1/511.5)*5;
delay(10);

  value=analogRead(ldrrd);
  volt=(value/1023)*5;
  luxs=((2500/volt)-500)/3.3;
  delay(10);

  Blynk.run();
  timer.run();
}

why?
please learn me? :joy:

2

Look at this example and change the IP address line
https://github.com/blynkkk/blynk-library/blob/master/examples/BoardsAndShields/Arduino_Ethernet_Manual/Arduino_Ethernet_Manual.ino

3

@rendydwiiputra you need the correct headers too.

Are you using an Ethernet Shield?

4

no i am use usb software serial @Costas@Pavel

5

I have used USB serial but not with local servers.
Is your server the same machine that the USB serial device is connected to?

6

ooh so
but i want to make blynk local server USB serial

connected to computer

7

Hello. You don’t need to change Blynk.begin() in case you want to connect to local server via USB.

This is info from USB sketch :

 You can specify port, baud rate, and server endpoint like this:
 ./blynk-ser.sh -c <serial port> -b <baud rate> -s <server address> -p <server port>