IDE 1.8.19/ Linux Ubuntu 18.04 LTS
I have uploaded through the OTA Web Updater function to the ESP32 via wifi.
But if I modify the OTAWebUpdater sketch to include my own sketch it still uploads over wifi but the processor seems frozen afterward; even using the EN button changes nothing. For instance a simple blink sketch included with the binary file for the OTAWebUpdater never initiates. But if I upload just the blink sketch by itself over the wifi the processor starts blinking.
Of course the issue with this is you can never upload OTA again because that bit was left out on the upload. Something is preventing the void loop() from executing or the processor is simply froze from what I can tell.
Another question I had is whether the ESP will be able to transition back after a OTA upload to
a WiFi Client/WiFi Server role included/required in my own sketch.
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <ESPmDNS.h>
#include <Update.h>
#define ONBOARD_LED 2
const char* host = "esp32";
const char* ssid = "hug2g******";
const char* password = "nurse*******";
WebServer server(80);
/*
* Login page
*/
const char* loginIndex =
"<form name='loginForm'>"
"<table width='20%' bgcolor='A09F9F' align='center'>"
"<tr>"
"<td colspan=2>"
"<center><font size=4><b>ESP32 Login Page</b></font></center>"
"<br>"
"</td>"
"<br>"
"<br>"
"</tr>"
"<tr>"
"<td>Username:</td>"
"<td><input type='text' size=25 name='userid'><br></td>"
"</tr>"
"<br>"
"<br>"
"<tr>"
"<td>Password:</td>"
"<td><input type='Password' size=25 name='pwd'><br></td>"
"<br>"
"<br>"
"</tr>"
"<tr>"
"<td><input type='submit' onclick='check(this.form)' value='Login'></td>"
"</tr>"
"</table>"
"</form>"
"<script>"
"function check(form)"
"{"
"if(form.userid.value=='admin' && form.pwd.value=='admin')"
"{"
"window.open('/serverIndex')"
"}"
"else"
"{"
" alert('Error Password or Username')/*displays error message*/"
"}"
"}"
"</script>";
/*
* Server Index Page
*/
const char* serverIndex =
"<script src='https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js'></script>"
"<form method='POST' action='#' enctype='multipart/form-data' id='upload_form'>"
"<input type='file' name='update'>"
"<input type='submit' value='Update'>"
"</form>"
"<div id='prg'>progress: 0%</div>"
"<script>"
"$('form').submit(function(e){"
"e.preventDefault();"
"var form = $('#upload_form')[0];"
"var data = new FormData(form);"
" $.ajax({"
"url: '/update',"
"type: 'POST',"
"data: data,"
"contentType: false,"
"processData:false,"
"xhr: function() {"
"var xhr = new window.XMLHttpRequest();"
"xhr.upload.addEventListener('progress', function(evt) {"
"if (evt.lengthComputable) {"
"var per = evt.loaded / evt.total;"
"$('#prg').html('progress: ' + Math.round(per*100) + '%');"
"}"
"}, false);"
"return xhr;"
"},"
"success:function(d, s) {"
"console.log('success!')"
"},"
"error: function (a, b, c) {"
"}"
"});"
"});"
"</script>";
/*
* setup function
*/
void setup(void) {
Serial.begin(115200);
// Connect to WiFi network
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
/*use mdns for host name resolution*/
if (!MDNS.begin(host)) { //http://esp32.local
Serial.println("Error setting up MDNS responder!");
while (1) {
delay(1000);
}
}
Serial.println("mDNS responder started");
/*return index page which is stored in serverIndex */
server.on("/", HTTP_GET, []() {
server.sendHeader("Connection", "close");
server.send(200, "text/html", loginIndex);
});
server.on("/serverIndex", HTTP_GET, []() {
server.sendHeader("Connection", "close");
server.send(200, "text/html", serverIndex);
});
/*handling uploading firmware file */
server.on("/update", HTTP_POST, []() {
server.sendHeader("Connection", "close");
server.send(200, "text/plain", (Update.hasError()) ? "FAIL" : "OK");
ESP.restart();
}, []() {
HTTPUpload& upload = server.upload();
if (upload.status == UPLOAD_FILE_START) {
Serial.printf("Update: %s\n", upload.filename.c_str());
if (!Update.begin(UPDATE_SIZE_UNKNOWN)) { //start with max available size
Update.printError(Serial);
}
} else if (upload.status == UPLOAD_FILE_WRITE) {
/* flashing firmware to ESP*/
if (Update.write(upload.buf, upload.currentSize) != upload.currentSize) {
Update.printError(Serial);
}
} else if (upload.status == UPLOAD_FILE_END) {
if (Update.end(true)) { //true to set the size to the current progress
Serial.printf("Update Success: %u\nRebooting...\n", upload.totalSize);
} else {
Update.printError(Serial);
}
}
});
server.begin();
}
void loop()
{
server.handleClient();
delay(1000);
digitalWrite(ONBOARD_LED,HIGH);
delay(100);
digitalWrite(ONBOARD_LED,LOW);
}