ESP8266 Community Forum

- Mon Jan 15, 2018 5:55 pm #73159 I'm trying to upload sketches without connecting the board to the computer with a USB cable. I started by using the basicOTA program from the examples. I can successfully upload the program and get the IP port with my home wifi information. However, when I want to use that IP port to upload a new sketch, I get an error that says error: No response from device. I added the screen shot of this one and the code I used. I only added the code to turn on an LED to see that the program actually works and does something.
I searched google and the Arduino Forum before I posted this, but I couldn't find anything helpful. It seems other people had this problem before but the solutions given to them didn't help me. Can somebody help me with this problem please?

Code: Select all#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>

#define beat 450
const char* ssid = "ID";
const char* password = "pass";

int pin = 14;
void setup() {
  pinMode(pin, OUTPUT);
  Serial.begin(115200);
  Serial.println("Booting");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("Connection Failed! Rebooting...");
    delay(5000);
    ESP.restart();
  }

  // Port defaults to 8266
  // ArduinoOTA.setPort(8266);

  // Hostname defaults to esp8266-[ChipID]
  // ArduinoOTA.setHostname("myesp8266");

  // No authentication by default
  // ArduinoOTA.setPassword((const char *)"123");

  ArduinoOTA.onStart([]() {
    Serial.println("Start");
  });
  ArduinoOTA.onEnd([]() {
    Serial.println("\nEnd");
  });
  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
  });
  ArduinoOTA.onError([](ota_error_t error) {
    Serial.printf("Error[%u]: ", error);
    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
    else if (error == OTA_END_ERROR) Serial.println("End Failed");
  });
  ArduinoOTA.begin();
  Serial.println("Ready");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  ArduinoOTA.handle();
  heartbeat();
  delay(30);
}
void heartbeat() {
  digitalWrite(pin, HIGH);
  delay(beat);
  digitalWrite(pin, LOW);
  delay(beat);
}

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- Tue Jan 16, 2018 1:35 am #73165 For OTA, memory must be at least twice as large as the program size.

- Tue Jan 23, 2018 5:14 pm #73437 Thanks. I just noticed that my sketch utilizes 66% of the memory. How does anyone accomplish what I'm trying to do if the space is so limited? Do they sell NodeMCUs with more memory?