TelnetStreamExample.ino has errors that prevent it from compiling

Fixes #72

examples/TelnetStreamExample/TelnetStreamExample.ino

@@ -5,28 +5,102 @@
 /* ------------------------------------------------- */
 
 #define SERIAL_SPEED  9600
-#define INFRA_SSID    "MY SSID"
-#define INFRA_PSWD    "MY PASS"
+#define WIFI_SSID     "MY SSID"
+#define WIFI_PASSWORD "MY PASS"
 
 /* ------------------------------------------------- */
 
 ESPTelnetStream telnet;
+IPAddress ip;
+uint16_t  port = 23;
 
 /* ------------------------------------------------- */
 
-void telnetConnected(String ip) {
+bool isConnected() {
+  return (WiFi.status() == WL_CONNECTED);
+}
+
+/* ------------------------------------------------- */
+
+void errorMsg(String error, bool restart = true) {
+  Serial.println(error);
+  if (restart) {
+    Serial.println("Rebooting now...");
+    delay(2000);
+    ESP.restart();
+    delay(2000);
+  }
+}
+
+/* ------------------------------------------------- */
+
+// (optional) callback functions for telnet events
+void onTelnetConnect(String ip) {
+  Serial.print("- Telnet: ");
   Serial.print(ip);
-  Serial.println(" connected.");
+  Serial.println(" connected");
+
+  telnet.println("\nWelcome " + telnet.getIP());
+  telnet.println("(Use ^] + q  to disconnect.)");
 }
 
-void telnetDisconnected(String ip) {
+/* ------------------------------------------------- */
+
+void onTelnetDisconnect(String ip) {
+  Serial.print("- Telnet: ");
   Serial.print(ip);
-  Serial.println(" disconnected.");
+  Serial.println(" disconnected");
 }
 
-void telnetReconnect(String ip) {
+/* ------------------------------------------------- */
+
+void onTelnetReconnect(String ip) {
+  Serial.print("- Telnet: ");
   Serial.print(ip);
-  Serial.println(" reconnected.");
+  Serial.println(" reconnected");
+}
+
+/* ------------------------------------------------- */
+
+void onTelnetConnectionAttempt(String ip) {
+  Serial.print("- Telnet: ");
+  Serial.print(ip);
+  Serial.println(" tried to connected");
+}
+
+/* ------------------------------------------------- */
+
+void onTelnetInput(String str) {
+  // checks for a certain command
+  if (str == "ping") {
+    telnet.println("> pong"); 
+    Serial.println("- Telnet: pong");
+  // disconnect the client
+  } else if (str == "bye") {
+    telnet.println("> disconnecting you...");
+    telnet.disconnectClient();
+  } else {
+    telnet.println(str);
+  }
+}
+
+/* ------------------------------------------------- */
+
+void setupTelnet() {  
+  // passing on functions for various telnet events
+  telnet.onConnect(onTelnetConnect);
+  telnet.onConnectionAttempt(onTelnetConnectionAttempt);
+  telnet.onReconnect(onTelnetReconnect);
+  telnet.onDisconnect(onTelnetDisconnect);
+  telnet.onInputReceived(onTelnetInput);
+
+  Serial.print("- Telnet: ");
+  if (telnet.begin(port)) {
+    Serial.println("running");
+  } else {
+    Serial.println("error.");
+    errorMsg("Will reboot...");
+  }
 }
 
 /* ------------------------------------------------- */