ESP32 core class 'Client' defines two additional pure virtual 'connect' functions which are leading to a compilation error (class 'MqttClient' becomes an abstract class and can not be instantiated, since it does not provide implementations for those pure virtual functions). This commit provides this implementation allowing the class 'MqttClient' to be used with the ESP32 core

Author: aentinger

src/MqttClient.cpp

@@ -632,6 +632,16 @@ int MqttClient::connect(const char *host, uint16_t port)
   return connect((uint32_t)0, host, port);
 }
 
+int MqttClient::connect(IPAddress ip, uint16_t port, int /* timeout */)
+{
+  return connect(ip, port);
+}
+
+int MqttClient::connect(const char *host, uint16_t port, int /* timeout */)
+{
+  return connect(host, port);
+}
+
 size_t MqttClient::write(uint8_t b)
 {
   return write(&b, sizeof(b));

src/MqttClient.h

@@ -67,6 +67,8 @@ class MqttClient : public Client {
   // from Client
   virtual int connect(IPAddress ip, uint16_t port = 1883);
   virtual int connect(const char *host, uint16_t port = 1883);
+  virtual int connect(IPAddress ip, uint16_t port, int timeout);
+  virtual int connect(const char *host, uint16_t port, int timeout);
   virtual size_t write(uint8_t);
   virtual size_t write(const uint8_t *buf, size_t size);
   virtual int available();