philbowles wrote:I'm confused. Did you attempt to move the code from a "good" board to a "bad" board with the tool? Then where is the erasconfig you are talking about?
OK. I thought a short version of my problem was enough, but here goes the longer more detailed version
My idea was to make a wireless link between two ESP8266 modules; one module working in AP mode, and the other in STA mode. I am using the Witty Cloud board for this setup (one board in STA mode and another board in AP mode).
My problem was, that the module in STA mode could not connect to the module in AP mode. I read a lot of forum posts about other people having trouble with the exact same, and some suggested that using the <i>ESP.eraseConfig();</i> in the setup function (I am using the Arduino IDE for development and compilation of the code), could solve the problem.
The code which I then used on the module which should run as AP is:
Code: Select all// *************************************************
// Prototypes
// *************************************************
void myDelay(int ms);
void blinkLED(int iopin, int msbetweentoggle, int numberofblink, boolean activeHigh);
// *************************************************
// Include headers
// *************************************************
#include <WiFiClient.h>
#include <ESP8266mDNS.h>
#include <ESP8266WiFi.h>
extern "C" {
#include "user_interface.h"
}
// *************************************************
// Definitions
// *************************************************
#define VERSION "1.0"
#define DEVICEID 2
// *************************************************
// Constant definitions
// *************************************************
const int ledPin = 2; // GPIO 2
const int greenLedPin = 12; // GPIO 12
const int blueLedPin = 13; // GPIO 13
const int redLedPin = 15; // GPIO 13
const char* ssid = "abc";
const char* password = "abcabcabc";
long lastTime=0;
long currentTime;
long interval;
IPAddress myIP(192,168,4,1);
IPAddress gateway(255, 255, 255, 0);
MDNSResponder mdns; //stoney
WiFiServer server(80);
void setup()
{
ESP.eraseConfig();
wifi_set_phy_mode(PHY_MODE_11G);
pinMode(greenLedPin, OUTPUT);
digitalWrite(greenLedPin, LOW); // Active HIGH
pinMode(blueLedPin, OUTPUT);
digitalWrite(blueLedPin, LOW); // Active HIGH
pinMode(redLedPin, OUTPUT);
digitalWrite(redLedPin, LOW); // Active HIGH
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, HIGH); // Active LOW
WiFi.disconnect();
delay(1000);
Serial.begin(115200);
Serial.println();
Serial.print("Configuring access point...");
WiFi.disconnect(true);
wifi_station_disconnect();
WiFi.mode(WIFI_AP);
WiFi.softAPConfig(myIP, myIP, gateway);
WiFi.softAP(ssid, password);
Serial.println("done");
IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
Serial.println(myIP);
server.begin();
Serial.println("HTTP server started");
blinkLED(greenLedPin, 100, 5, true);
interval = 5000;
WiFi.printDiag(Serial);
}
void loop()
{
mdns.update(); // Check for any mDNS queries and send responses
currentTime = millis();
if (currentTime - lastTime > interval)
{
myDelay(100); // make a 100msec delay to make the ESP8266 Watchdog happy
lastTime = currentTime;
}
WiFiClient client = server.available(); // Check if a client has connected
if (!client)
{
// delay(100);
return;
}
blinkLED(blueLedPin, 100, 5, true);
Serial.println("");
Serial.println("New client");
// Wait for data from client to become available
while (client.connected() && !client.available())
{
delay(1);
}
// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
client.stop();
}
void myDelay(int ms)
{
int i;
for(i=1;i!=ms;i++)
{
delay(1);
if(i%100 == 0)
{
ESP.wdtFeed();
yield();
}
}
}
void blinkLED(int iopin, int msbetweentoggle, int numberofblink, boolean activeHigh)
{
for (int i=0; i<numberofblink; i++)
{
digitalWrite(iopin, activeHigh);
delay(msbetweentoggle);
digitalWrite(iopin, !activeHigh);
if (numberofblink > 1)
{
delay(msbetweentoggle);
}
}
}
The code did not work, and I was not able to get the link working.
After that, I tried to compile and run an old web server program. But now the ESP8266-module will not connect to my router.
The old web server code is:
Code: Select all#include <ESP8266WiFi.h>
const char* ssid = "SSID";
const char* password = "PASSWORD";
const int ledPin = 2; // GPIO2
WiFiServer server(80);
void setup()
{
Serial.begin(9600);
delay(10);
WiFi.softAPdisconnect(true); // Be sure that the ESP8266 is in standard mode (NOT AP mode)
WiFi.mode(WIFI_STA); // WIFI_AP WIFI_AP_STA WIFI_STA
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, HIGH); // Active LOW
// Connect to WiFi network
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.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop()
{
// Check if a client has connected
WiFiClient client = server.available();
if (!client)
{
return;
}
// Toggle LED to show a client has connected
for (int i=0; i<40; i++)
{
digitalWrite(ledPin, LOW); // Active LOW
delay(100 - i*2);
digitalWrite(ledPin, HIGH);
delay(100 - i*2);
}
// Wait until the client sends some data
Serial.println("new client");
while(client.connected() && !client.available())
{
delay(1);
}
client.flush();
// Prepare the response
String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\n";
s += "<table width='350px'><tr><td>";
s += "<center><p style='font-family:verdana'>Hello World</p></center>\n";
s += "<br><br>\n";
s += "</td></tr></table>\n";
s += "</html>\n";
// Send the response to the client
client.print(s);
delay(1);
Serial.println("Client disonnected");
Serial.println("");
client.stop();
}
I then found a new ESP8266-module, and uploaded the web server code, as shown above, to it, and it works perfect. So my conclusion is: The module which I ran as AP has been "changed" in a way that I will not work as it did before. And my conclusion was that it was due to the <i>ESP.eraseConfig();</i>. That is, that some usefull configuration data has been erased.
Now to the second part of this.
I thought, I could just make a memory dump of the new ESP8266-module, and upload it to the module which has run as AP. For this purpose I used the <i>esptool.py</i> and used the <i>read_flash</i> option to dump all 5 memory areas as specified here:
http://www.electrodragon.com/w/Category:ESP8266_Code_Guide#Firmware_Details. After that, I used the <i>write_flash</i> option to save the dumped data back to the module which has run as AP.
It did not solve my problem.
The module which has run as AP will still not connect to my network with the web server code.
So, my initial question was: Is there something I have forgotten in this process? Will <i>ESP.eraseConfig();</i> erase more info than just the saved SSID and PASSWORD on the ESP8266-module?
I am using Arduino IDE version 1.8.3
Posted: Thu Jun 29, 2017 8:15 am