Adding telnet for remote debugging purpose

LibreMetric.ino

@@ -1,3 +1,6 @@
+// global config
+
+#include "config.h"
 
 //################# LIBRARIES ##########################
 #include <ESP8266WiFi.h>
@@ -8,6 +11,8 @@
 #include <Adafruit_GFX.h>
 #include <Max72xxPanel.h>
 #include <time.h>
+#include "d_helper.h"
+
 
 //################# DISPLAY CONNECTIONS ################
 // LED Matrix Pin -> ESP8266 Pin
@@ -53,7 +58,13 @@ void setup() {
   Serial.println(F("WiFi connected..."));
   Serial.println(WiFi.localIP());
   configTime(timezone * 3600, dstOffset * 3600, ntpServer); // First sync of time with (S)NTP
-  
+
+#ifdef DEBUG_TELNET
+  // Start the Telnet server
+  telnetServer.begin();
+  telnetServer.setNoDelay(true);
+#endif
+
 //----------------------------------------------------------------------
   server.begin();
   Serial.println(F("Webserver started..."));
@@ -73,6 +84,10 @@ void setup() {
 }
 
 void loop() {
+#ifdef DEBUG_TELNET
+  // Handle Telnet connection for debugging
+  handleTelnet();
+#endif
   server.handleClient();
   matrix.fillScreen(LOW);
   time_t now = time(nullptr);

OTAsetup.cpp

@@ -0,0 +1,31 @@
+
+#include "OTAsetup.h"
+
+void initOTA(){
+  // Set hostname and start OTA
+  ArduinoOTA.setHostname("LibreMetric");
+  // Start of OTA
+  ArduinoOTA.onStart([]() {
+    DEBUG_PRINTLN("OTA Beginning!");
+  });
+  // progress of OTA
+  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
+    DEBUG_PRINTF("progress: %u%%\r", (progress/(total/100)));
+  });
+  // OTA onEnd
+  ArduinoOTA.onEnd([](){
+    DEBUG_PRINTLN("\nOTA ended, let\'s restart");
+  });
+  // OTA error handle
+  ArduinoOTA.onError([](ota_error_t error) {
+    DEBUG_PRINT("ArduinoOTA Error[");
+    DEBUG_PRINT(error);
+    DEBUG_PRINT("]: ");
+    if (error == OTA_AUTH_ERROR) DEBUG_PRINTLN("Auth Failed");
+    else if (error == OTA_BEGIN_ERROR) DEBUG_PRINTLN("Begin Failed");
+    else if (error == OTA_CONNECT_ERROR) DEBUG_PRINTLN("Connect Failed");
+    else if (error == OTA_RECEIVE_ERROR) DEBUG_PRINTLN("Receive Failed");
+    else if (error == OTA_END_ERROR) DEBUG_PRINTLN("End Failed");
+  });
+  ArduinoOTA.begin();
+}

OTAsetup.h

@@ -0,0 +1,10 @@
+
+#ifndef OTAsetup_h
+#define OTAsetup_h
+
+#include <ArduinoOTA.h>
+#include "d_helper.h"
+
+void initOTA();
+
+#endif

config.h

@@ -0,0 +1,6 @@
+// Enable console output via telnet
+// #define DEBUG_TELNET
+
+
+// Enable wifimanager debug
+// #define DEBUG_WifiM

d_helper.cpp

@@ -0,0 +1,31 @@
+// debug helper
+
+#include "d_helper.h"
+
+// in a terminal: telnet esp IP
+#ifdef DEBUG_TELNET
+WiFiServer  telnetServer(23);
+WiFiClient  telnetClient;
+#endif
+
+///////////////////////////////////////////////////////////////////////////
+//   TELNET
+///////////////////////////////////////////////////////////////////////////
+/*
+   Function called to handle Telnet clients
+   https://www.youtube.com/watch?v=j9yW10OcahI
+*/
+#ifdef DEBUG_TELNET
+void handleTelnet(void) {
+  if (telnetServer.hasClient()) {
+    if (!telnetClient || !telnetClient.connected()) {
+      if (telnetClient) {
+        telnetClient.stop();
+      }
+      telnetClient = telnetServer.available();
+    } else {
+      telnetServer.available().stop();
+    }
+  }
+}
+#endif

d_helper.h

@@ -0,0 +1,21 @@
+#ifndef D_helper_h
+#define D_helper_h
+
+void handleTelnet(void);
+
+// ################# Macros for debugging ################
+#ifdef DEBUG_TELNET
+#define     DEBUG_PRINT(x)    telnetClient.print(x)
+#define     DEBUG_PRINTF(x,y)   telnetClient.printf(x,y)
+#define     DEBUG_PRINT_WITH_FMT(x, fmt)    telnetClient.print(x, fmt)
+#define     DEBUG_PRINTLN(x)  telnetClient.println(x)
+#define     DEBUG_PRINTLN_WITH_FMT(x, fmt)  telnetClient.println(x, fmt)
+#else
+#define     DEBUG_PRINT(x)    Serial.print(x)
+#define     DEBUG_PRINTF(x,y)   Serial.printf(x,y)
+#define     DEBUG_PRINT_WITH_FMT(x, fmt)    Serial.print(x, fmt)
+#define     DEBUG_PRINTLN(x)  Serial.println(x)
+#define     DEBUG_PRINTLN_WITH_FMT(x, fmt)  Serial.println(x, fmt)
+#endif
+
+#endif