Hi,

Please ensure the tool bar shows "Release" and not "Debug" then try the upload again.

Also confirm which version of the esp core you have installed?

Thanks

Thanks. It's important to check what was going wrong so I have a question.

Are you uploading with ip address or serial/com?

Thanks

Thanks.

Did you see "Connecting to " in the serial monitor when it did not connect?

Thanks I will try it. The debugger, in COM not IP mode, just uses serial which your code is already using so it will be interesting to find the issue.

By the way, possibly of no interest, the OTA upload is much faster than the serial upload.

Hi,

This issue is resolved in the next release although it might be something the esp team want to investigate. 

The debugger adds adds a small delay to the start of the mcu giving the serial monitor time to open and avoid missing the serial messages sent from the setup() method.

The delay() is injected into the temp build copy of the code at the start of the setup() as per the following example. In my tests, adding this single line of code to your example produces the result that you have described.

Below you can see that I have tested with a delay(3000) and that consistently causes a problem for me. Does it for you?

The next release doesn't bother with the delay if an esp board is selected.

Thanks

The interim update 1704.15 can be downloaded from here

#include <ESP8266WiFi.h>

const char* ssid = "your-ssid";
const char* password = "your-password";

// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);

void setup() {
  delay(3000);  //<<<<< simulate debugger delay
  Serial.begin(115200);
  delay(10);

  // prepare GPIO2
  pinMode(2, OUTPUT);
  digitalWrite(2, 0);
 
  // Connect to WiFi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
 
  WiFi.begin(ssid, password);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
 
  // Start the server
  server.begin();
  Serial.println("Server started");

  // Print the IP address
  Serial.println(WiFi.localIP());
}