Add Project for configuring WiFi

WiFiAccessPointConfigurator/WiFiAccessPointConfigurator.ino

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+
+/* Create a WiFi access point and provide a web server on it. */
+
+#include <ESP8266WiFi.h>
+#include <WiFiClient.h> 
+#include <ESP8266WebServer.h>
+#include <ESP8266mDNS.h>
+#include <EEPROM.h>
+#include <errno.h>
+
+#define EEPROM_SIZE 512
+char eeprom[EEPROM_SIZE];
+
+/*  Mode could be 0 for Setup, 1 for normal use
+ *  Setup mode is trigger by setting GPIO3 to ground or at first boot
+*/
+int mode = 0;
+
+/* Set these to your desired credentials. */
+const char *ssid = "ESPConfigurator";
+
+ESP8266WebServer server(80);
+
+/* Just a little test message.  Go to http://192.168.4.1 in a web browser
+ * connected to this access point to see it.
+ */
+void handleRoot() {
+	server.send(200, "text/html", "<h1>You are connected</h1><br/><a href=\"/setup\">Setup</a>");
+}
+
+void handleSetup() {
+  server.send(200, "text/html", "<form action=\"/save\" method=\"get\">"
+  "<div><label for=\"ssid\">Wifi SSID :</label> <input type=\"text\" name=\"ssid\" /></div>"
+  "<div><label for=\"password\">Wifi Password :</label><input type=\"password\" name=\"password\" /> </div>"
+  "<div><label for=\"host\">Hostname :</label><input type=\"text\" name=\"host\" /> </div>"
+  "<div class=\"button\"> <button type=\"submit\">Save</button></div>"
+  "</form>");
+}
+
+void handleGpio() {
+  if(!server.hasArg("gpio") || !server.hasArg("value")){
+    server.send(500, "text/plain", "Bad arguments\r\n");
+    return;
+  }
+
+  digitalWrite(server.arg("gpio").toInt(), server.arg("value").toInt());
+  pinMode(server.arg("gpio").toInt(), OUTPUT);
+  server.send(200, "text/html", "<h1>GPIO" + server.arg("gpio") + " changed to " + server.arg("value") +"</h1>");
+}
+
+int saveConfig(String ssid, String password, String host ){
+  String eeprom;
+  
+  eeprom = "1;"+ssid+";"+password+";"+host+";";
+
+  if(eeprom.length() > EEPROM_SIZE )
+    return -EMSGSIZE;
+    
+  Serial.println("Saving "+eeprom);
+
+  for (int i = 0; i < eeprom.length() && i < EEPROM_SIZE; i++){
+    EEPROM.write(i, eeprom.charAt(i));  
+  }
+
+  EEPROM.commit();
+  delay(100);
+
+  return 0;
+}
+
+void handleSave() {
+  String password;
+  String ssid;
+  String hostName;
+
+  if(!server.hasArg("ssid") || !server.hasArg("password") || !server.hasArg("host")){
+    server.send(500, "text/plain", "Bad arguments\r\n");
+    return;
+  }
+
+  if(saveConfig(server.arg("ssid"), server.arg("password"), server.arg("host")) < 0){
+    server.send(500, "text/plain", "Cannot Save Credentials (Too long ?Contains \";\"?)\r\n");
+    return;
+  }
+     
+  server.send(200, "text/html", "<h1>Configuration Saved</h1>");
+}
+
+void handleNotFound(){
+  String message = "File Not Found\n\n";
+  message += "URI: ";
+  message += server.uri();
+  message += "\nMethod: ";
+  message += (server.method() == HTTP_GET)?"GET":"POST";
+  message += "\nArguments: ";
+  message += server.args();
+  message += "\n";
+  for (uint8_t i=0; i<server.args(); i++){
+    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
+  }
+  server.send(404, "text/plain", message);
+}
+
+void readEEPROM(int &configured, char **ssid, char **password, char **host){
+
+  int i = 2;
+  
+  configured = (EEPROM.read(0) == '1') ;
+
+  if (!configured)
+    return;
+
+  //Read SSID
+  *ssid = &eeprom[2];
+  do {
+    eeprom[i]= EEPROM.read(i);
+    i++;
+  } while(i < EEPROM_SIZE && eeprom[i-1] != ';');
+  eeprom[i-1] = '\0';
+
+  //Read password
+  *password = &eeprom[i];
+  do {
+    eeprom[i]= EEPROM.read(i);
+    i++;
+  } while(i < EEPROM_SIZE && eeprom[i-1] != ';');
+  eeprom[i-1] = '\0';
+
+  //Read HostName
+  *host = &eeprom[i];
+  do {
+    eeprom[i]= EEPROM.read(i);
+    i++;
+  } while(i < EEPROM_SIZE && eeprom[i-1] != ';');
+  eeprom[i-1] = '\0'; 
+
+}
+
+void setupWifi(int configured, int forceSetup, char *confSsid, char *confPassword, char *confHost){
+  IPAddress myIP;
+  if(!configured || forceSetup ){
+    Serial.println("Configuring access point...");
+    /* You can set a password to the AP here */
+    WiFi.softAP(ssid);
+    myIP = WiFi.softAPIP();
+  }else{
+    Serial.println("Connecting to Wifi...");
+    WiFi.begin(confSsid, confPassword);
+    while (WiFi.status() != WL_CONNECTED) {
+      delay(500);
+      Serial.print(".");
+    }
+    Serial.println("");
+    Serial.println("WiFi connected");
+
+    if (!MDNS.begin(confHost)) {
+      Serial.println("Error setting up MDNS responder!");
+      while(1) { 
+        delay(1000);
+      }
+    }
+    Serial.println("mDNS responder started");
+    myIP = WiFi.localIP();
+  }
+  
+  Serial.print("My IP address: ");
+  Serial.println(myIP);
+}
+
+void setup() {
+  pinMode(3, OUTPUT);
+  
+  int configured;
+  char *confSsid;
+  char *confPassword;
+  char *confHost;
+  
+	delay(1000);
+	Serial.begin(115200);
+  Serial.println();
+
+  // Get GPIO 3 Status
+  Serial.swap(); //Switch Serial on GPIO 13 & 15 
+  pinMode(3, INPUT_PULLUP);
+  int txStatus = digitalRead(3);
+  //Serial.swap(); // Switch back
+
+  EEPROM.begin(EEPROM_SIZE);
+  readEEPROM(configured, &confSsid, &confPassword, &confHost);
+  if(configured){
+    Serial.println("Configuration Found !:");
+    Serial.println(confSsid);
+    Serial.println(confPassword);
+    Serial.println(confHost);
+    Serial.println();
+  }else{
+    Serial.println("No configuration saved");
+  }
+  
+  Serial.print("GPIO 3 status :");
+  Serial.print(txStatus);
+	Serial.println();  
+
+  setupWifi(configured, txStatus == 0, confSsid, confPassword, confHost);
+
+	server.on("/", handleRoot);
+  server.on("/setup", handleSetup);
+  server.on("/save", handleSave);
+  if(configured)
+    server.on("/gpio", handleGpio);
+  server.onNotFound(handleNotFound);
+	server.begin();
+	Serial.println("HTTP server started");
+}
+
+void loop() {
+	server.handleClient();
+}