Backend working

README.md

@@ -1,6 +1,15 @@
 # Esp8266-Laser
 Wifi Host for the Arduino-Laser-Spirograph
 
+#usage:	
+  /motor/{motorNr}/{value}
+  /laser/{value}
+  /ssid/{ssidname}
+  /pwd/{password}
+  /apmode/1 -> SofAP (default), 0 -> client
+  /saveconf -> write wificonfig to file
+  /resetwifi -> reconnect wifi with the new settings (this will work)
+
 #install
 - install arduino ide (1.8.5)
 
@@ -9,13 +18,17 @@ Wifi Host for the Arduino-Laser-Spirograph
 
 - clone/exctract repo to sketchbook
 
-- install this libary 
+- install this libaries
   https://github.com/plerup/espsoftwareserial
+  https://github.com/bblanchon/ArduinoJson/
 
 - follow this instruction:
+	set wifi parameters in data/config.json before upload 
 	http://esp8266.github.io/Arduino/versions/2.0.0/doc/filesystem.html#uploading-files-to-file-system
 
 You may also need to:
 - get and install driver for nodemcu
   https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
 
+
+  

data/config.json

@@ -0,0 +1,5 @@
+{
+	"apMode": 0,
+	"SSID": "",
+	"Password": ""
+}

esp8266-laser.ino

@@ -1,30 +1,24 @@
 /*
   https://github.com/0x1d/esp8266-laser
 
-  #usage:
-  /motor/{motorNr}/{value}
-  /laser/{value}
-  /ssid/{ssidname}
-  /pwd/{password}
-  /wiap/1 -> SofAP, 0 -> client
-  /saveconf -> will write wificonfig to file
 */
+
 #include <ESP8266WiFi.h>
 #include <WiFiClient.h>
 #include <ESP8266WebServer.h>
 #include <ESP8266mDNS.h>
 #include <FS.h>
 #include <SoftwareSerial.h>
+#include <ArduinoJson.h>
 
 SoftwareSerial laserSerial(14, 12, false, 256);
 
-String ssid2     = "XTZ-72315";
-String password2 = "dgzv-6erv-bbbb-bbbb";
 String ssid = "";
 String password = "";
 
-int wifiMode = 0; // 0: client, 1: AP (default)
+int apMode = 1; // 0: client, 1: AP (default) // will be overwriten 
-int wifiTimeout = 20000; //ms
+int apModeRuntime = 0; 
+int wifiTimeout = 10000; //ms
 
 /* Soft AP network parameters */
 char *ssidAP = "laserAp";
@@ -55,42 +49,6 @@ String formatBytes(size_t bytes) {
   }
 }
 
-boolean writeWifiConfigFile() {
-
-}
-
-void readWifiConfigFile() {
-  File f = SPIFFS.open("/config.ini", "r");
-  if (!f) {
-    Serial.println("config file open failed");
-  }
-  Serial.println("Reading wifi config");
-  String s = f.readStringUntil('\n');
-  if (s.substring(0, 4) == "mode") {
-    wifiMode = s.substring(5, 6).toInt();
-    Serial.print("wifiMode=");
-    Serial.print(wifiMode);
-    Serial.println(";");
-  }
-  s = f.readStringUntil('\n');
-  if (s.substring(0, 4) == "ssid") {
-    ssid = String();
-    ssid = s.substring(5);
-    Serial.print("ssid=");
-    Serial.print(ssid);
-    Serial.println(";");
-  }
-  s = f.readStringUntil('\n');
-  if (s.substring(0, 3) == "pwd") {
-    password = String();
-    password = s.substring(4);
-    Serial.print("password=");
-    Serial.print(password);
-    Serial.println(";");
-  }
-  f.close();
-}
-
 String getContentType(String filename) {
   if (server.hasArg("download")) return "application/octet-stream";
   else if (filename.endsWith(".htm")) return "text/html";
@@ -210,37 +168,37 @@ void handlePwd(String uri)
   server.send(200, "text/json", json);
   json = String();
 }
-void handleWiAp(String uri)
+void handleApmode(String uri)
 {
-  wifiMode = uri.substring(6, 7).toInt();
+  apMode = uri.substring(8, 9).toInt();
-  String json = "{ \"handledWiAp\":";
+  apModeRuntime = apMode;
-  json += "{\"softAp\":\"" + (String)wifiMode + "\"}}";
+  String json = "{ \"handledApmode\":";
+  json += "{\"apMode\":\"" + (String)apMode + "\"}}";
   server.send(200, "text/json", json);
   json = String();
 }
 
+bool saveConfigFile() {
+  StaticJsonBuffer<200> jsonBuffer;
+  JsonObject& json = jsonBuffer.createObject();
+  json["apMode"] = apMode;
+  json["SSID"] = ssid;
+  json["Password"] = password;
+
+  File configFile = SPIFFS.open("/config.json", "w");
+  if (!configFile) {
+    Serial.println("Failed to open config file for writing");
+    return false;
+  }
+  json.printTo(configFile);
+  return true;
+}
+
 void handleSaveConf() {
-  boolean success = false;
+  bool success = saveConfigFile();
-  File f = SPIFFS.open("/config.ini", "w");
+  if (success)
-  if (!f) {
-    Serial.println("config file open failed");
-    success = false;
-  }
-  else
   {
-    Serial.println("Writing wifi config");
+    server.send(200, "text/plain", "saved config to file,<br> reset or /resetwifi to apply settings");
-    f.print("mode:");
-    f.println(wifiMode);
-    f.print("ssid:");
-    f.println(ssid);
-    f.print("pwd:");
-    f.println(password);
-    f.close();
-    success = true;
-  }
-  if (success == true)
-  {
-    server.send(200, "text/plain", "saved config to file, reset to apply");
   }
   else
   {
@@ -248,22 +206,58 @@ void handleSaveConf() {
   }
 }
 
+boolean readConfigFile() {
+  Serial.println("Reading config.json");
+  File configFile = SPIFFS.open("/config.json", "r");
+  if (!configFile) {
+    Serial.println("Failed to open config file");
+    return false;
+  }
+  size_t size = configFile.size();
+  if (size > 1024) {
+    Serial.println("Config file size is too large");
+    return false;
+  }
+  // Allocate a buffer to store contents of the file.
+  std::unique_ptr<char[]> buf(new char[size]);
+
+  configFile.readBytes(buf.get(), size);
+
+  StaticJsonBuffer<200> jsonBuffer;
+  JsonObject& json = jsonBuffer.parseObject(buf.get());
+
+  if (!json.success()) {
+    Serial.println("Failed to parse config file");
+    return false;
+  }
+  apMode = json["apMode"];
+  apModeRuntime = apMode;
+  const char* tSsid = json["SSID"];
+  const char* tPwd = json["Password"];
+  ssid = tSsid;
+  password = tPwd;
+  Serial.print("SSID: ");
+  Serial.println(ssid);
+  Serial.print("PW: ");
+  Serial.println(password);
+  return true;
+}
+
 boolean setupWifi() {
-  Serial.print("setupWifi mode=");
+  Serial.print("setupWifi apMode=");
-  Serial.println(wifiMode);
+  Serial.println(apModeRuntime);
-  if (wifiMode == 0)
+  if (apModeRuntime == 0)
   {
     Serial.print("Connecting to ");
     Serial.println(ssid);
 
     WiFi.mode(WIFI_STA);
-    WiFi.begin(ssid.c_str(), password2.c_str());
+    WiFi.begin(ssid.c_str(), password.c_str());
 
     previousMillis = millis();
     while (WiFi.status() != WL_CONNECTED) {
       delay(500);
       Serial.print(".");
-      Serial.print(WiFi.status());
       if (millis() - previousMillis >= wifiTimeout) {
         Serial.println("");
         Serial.println("connection timedout");
@@ -276,7 +270,7 @@ boolean setupWifi() {
     Serial.println(WiFi.localIP());
     return true;
   }
-  else if (wifiMode == 1)
+  else
   {
     Serial.printf("Starting SoftAP %s\n", ssidAP);
     WiFi.mode(WIFI_AP);
@@ -292,62 +286,30 @@ void setup(void) {
   Serial.begin(115200);
   Serial.print("\n");
   SPIFFS.begin();
-  {
+//  {
-    Dir dir = SPIFFS.openDir("/");
+//    Dir dir = SPIFFS.openDir("/");
-    while (dir.next()) {
+//    while (dir.next()) {
-      String fileName = dir.fileName();
+//      String fileName = dir.fileName();
-      size_t fileSize = dir.fileSize();
+//      size_t fileSize = dir.fileSize();
-      Serial.printf("FS File: %s, size: %s\n", fileName.c_str(), formatBytes(fileSize).c_str());
+//      Serial.printf("FS File: %s, size: %s\n", fileName.c_str(), formatBytes(fileSize).c_str());
-    }
+//    }
-    Serial.printf("\n");
+//    Serial.printf("\n");
-  }
+//  }
 
   //WIFI INIT
   WiFi.disconnect();
   delay(100);
-  readWifiConfigFile();
+  if (!readConfigFile())
+  {
+    Serial.println("reading wifi config failed, start SoftAP");
+    apModeRuntime = 1;
+  }
   delay(100);
 
-  delay(100);
+  if (!setupWifi())
-  int n = WiFi.scanNetworks();
-  Serial.println("scan done");
-  if (n == 0)
-    Serial.println("no networks found");
-  else
   {
-    //    Serial.print(n);
+    Serial.println("connect failed, start SoftAP");
-    //    Serial.println(" networks found");
+    apModeRuntime = 1; // fallback to AP mode
-    for (int i = 0; i < n; ++i)
-    {
-      // Print SSID and RSSI for each network found
-      //      Serial.print(i + 1);
-      //      Serial.print(": ");
-      //      Serial.print(WiFi.SSID(i));
-      //      Serial.print(" (");
-      //      Serial.print(WiFi.RSSI(i));
-      //      Serial.print(")");
-      //      Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE) ? " " : "*");
-      delay(10);
-      if (WiFi.SSID(i) == ssid) {
-        Serial.println("found ssid");
-      }
-      else if (WiFi.SSID(i) == ssid.c_str()) {
-        Serial.println("found ssid.c_str");
-      }
-      else if (WiFi.SSID(i) == ssid2) {
-        Serial.println("found ssid2");
-      }
-      else if (WiFi.SSID(i) == ssid2.c_str()) {
-        Serial.println("found ssid2.c_str()");
-      }
-    }
-  }
-
-  boolean wifiConnected = setupWifi();
-  if (!wifiConnected)
-  {
-    Serial.println("set wifiMode=1");
-    wifiMode = 1; // fallback to AP mode
     setupWifi();
   }
 
@@ -364,10 +326,8 @@ void setup(void) {
   //SERVER INIT
   //list directory
   server.on("/listFiles", HTTP_GET, handleFileList);
-  //server.on("/wwc", HTTP_GET, writeWifiConfigFile);
-  //server.on("/rwc", HTTP_GET, readWifiConfigFile);
   server.on("/saveconf", HTTP_GET, handleSaveConf);
-  server.on("/sw", HTTP_GET, setupWifi);
+  server.on("/resetwifi", HTTP_GET, setupWifi);
   server.on("/heap", HTTP_GET, []() {
     String json = "{";
     json += "\"heap\":" + String(ESP.getFreeHeap());
@@ -396,7 +356,6 @@ void handleNotFound() {
   }
   if (uri.substring(0, 6) == "/ssid/")
   {
-
     handleSsid(uri);
     return;
   }
@@ -405,9 +364,14 @@ void handleNotFound() {
     handlePwd(uri);
     return;
   }
-  if (uri.substring(0, 6) == "/wiap/")
+  if (uri.substring(0, 8) == "/apmode/")
   {
-    handleWiAp(uri);
+    handleApmode(uri);
+    return;
+  }
+  if (uri.substring(0,12) == "/config.json")
+  {    
+    server.send(403, "text/plain", "Forbidden");
     return;
   }
   if (!handleFileRead(server.uri()))