Hey. I am experimenting with ESP32 wifi Station and access point modes. I am noticing a lot of confusing things and cannot get my head arround how to work it out. I will try to explain my findings as clear as possible hopefully someone with little bit more knowledge can help me troubleshoot these issues.
1.So I have started with this example project:
https://randomnerdtutorials.com/esp32-esp8266-input-data-html-form/
Configuring my ESP32 as station mode, connecting to existing wifi and sending data from my computer to ESP32. Everything works perfectly fine!
Now I would like to add 1 feature to this example. If the entered wifi credentials are wrong or has been changed, start th ESP32 in access point mode. I can connect to this access point on my computer and type in the new wifi credentials. Save them in eeprom, and then the ESP32 will sucessfully connect to the wifi. ( I know there are Wifi manager libraries but I have tried them and could not fully understand how they work therefore I have tried to implement something very simple myself).
2. Before I try to mix station and AP modes in a single sketch, I have decided to first try the access point and see how it behaves. All I did is just changed the wifi mode and started soft AP. The full code:
Now thats where the confusing things start. my guess is that something might be worng with the wifi persistent function?:
//WiFi.persistent(false);
After programming the device, the new wifi network appears on the list:
Clearly thats not the network that I have just created since its a different name? How does that happen? Perhaps I have made this access point some other time a while a go and it somehow saved the configuration? How can I complete wipe the wifi configuration settings? Can someone help me understand how this libraray is supposed to be used in access point mode correctly? I appreciate any help
1.So I have started with this example project:
https://randomnerdtutorials.com/esp32-esp8266-input-data-html-form/
Configuring my ESP32 as station mode, connecting to existing wifi and sending data from my computer to ESP32. Everything works perfectly fine!
Now I would like to add 1 feature to this example. If the entered wifi credentials are wrong or has been changed, start th ESP32 in access point mode. I can connect to this access point on my computer and type in the new wifi credentials. Save them in eeprom, and then the ESP32 will sucessfully connect to the wifi. ( I know there are Wifi manager libraries but I have tried them and could not fully understand how they work therefore I have tried to implement something very simple myself).
2. Before I try to mix station and AP modes in a single sketch, I have decided to first try the access point and see how it behaves. All I did is just changed the wifi mode and started soft AP. The full code:
Code:
/*********
Rui Santos
Complete project details at https://RandomNerdTutorials.com/esp32-esp8266-input-data-html-form/
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
*********/
#include <Arduino.h>
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
AsyncWebServer server(80);
#define MODE_ACCESS_POINT 0
#define MODE_NORMAL 1
// REPLACE WITH YOUR NETWORK CREDENTIALS
const char* ssid = "Pick_to_light";
const char* password = "teltonika20";
const char* PARAM_INPUT_1 = "input1";
const char* PARAM_INPUT_2 = "input2";
const char* PARAM_INPUT_3 = "input3";
// HTML web page to handle 3 input fields (input1, input2, input3)
const char index_html[] PROGMEM = R"rawliteral(
<!DOCTYPE HTML><html><head>
<title>ESP Input Form</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head><body>
<form action="/get">
input1: <input type="text" name="input1">
<input type="submit" value="Submit">
</form><br>
<form action="/get">
input2: <input type="text" name="input2">
<input type="submit" value="Submit">
</form><br>
<form action="/get">
input3: <input type="text" name="input3">
<input type="submit" value="Submit">
</form>
</body></html>)rawliteral";
void notFound(AsyncWebServerRequest *request) {
request->send(404, "text/plain", "Not found");
}
/*
void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
if (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println("WiFi Failed!");
return;
}
Serial.println();
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
*/
void setup() {
Serial.begin(115200);
//WiFi.persistent(false);
WiFi.mode(WIFI_AP);
WiFi.softAP("ESPNOW_test", "esp");
WiFi.softAPdisconnect(false);// when called with false, creates an old access point ? HOW?
Serial.print("MAC address of this node is ");
Serial.println(WiFi.softAPmacAddress());
Serial.println();
Serial.print("IP address: ");
Serial.println(WiFi.softAPIP());
// Send web page with input fields to client
server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/html", index_html);
});
// Send a GET request to <ESP_IP>/get?input1=<inputMessage>
server.on("/get", HTTP_GET, [] (AsyncWebServerRequest *request) {
String inputMessage;
String inputParam;
// GET input1 value on <ESP_IP>/get?input1=<inputMessage>
if (request->hasParam(PARAM_INPUT_1)) {
inputMessage = request->getParam(PARAM_INPUT_1)->value();
inputParam = PARAM_INPUT_1;
}
// GET input2 value on <ESP_IP>/get?input2=<inputMessage>
else if (request->hasParam(PARAM_INPUT_2)) {
inputMessage = request->getParam(PARAM_INPUT_2)->value();
inputParam = PARAM_INPUT_2;
}
// GET input3 value on <ESP_IP>/get?input3=<inputMessage>
else if (request->hasParam(PARAM_INPUT_3)) {
inputMessage = request->getParam(PARAM_INPUT_3)->value();
inputParam = PARAM_INPUT_3;
}
else {
inputMessage = "No message sent";
inputParam = "none";
}
Serial.println(inputMessage);
request->send(200, "text/html", "HTTP GET request sent to your ESP on input field ("
+ inputParam + ") with value: " + inputMessage +
"<br><a href=\"/\">Return to Home Page</a>");
});
server.onNotFound(notFound);
server.begin();
}
void loop() {
}Now thats where the confusing things start. my guess is that something might be worng with the wifi persistent function?:
//WiFi.persistent(false);
After programming the device, the new wifi network appears on the list:
Clearly thats not the network that I have just created since its a different name? How does that happen? Perhaps I have made this access point some other time a while a go and it somehow saved the configuration? How can I complete wipe the wifi configuration settings? Can someone help me understand how this libraray is supposed to be used in access point mode correctly? I appreciate any help
