error: conflicting return type specified for 'virtual void Sha256Class::write(uint8_t)'

[zaifz]

I'm using Generic ESP8266 module and trying to establish a secure SSL connection. I get the following error after installing all the libraries:

In file included from /Users/huzaifah/Downloads/aws-mqtt-websockets-master/examples/aws-mqtt-websocket-example/aws-mqtt-websocket-example.ino:8:0: /Users/huzaifah/Documents/Arduino/libraries/Others/sha256.h:26:18: error: conflicting return type specified for 'virtual void Sha256Class::write(uint8_t)' virtual void write(uint8_t); ^ In file included from /Users/huzaifah/Library/Arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/Stream.h:26:0, from /Users/huzaifah/Library/Arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/HardwareSerial.h:31, from /Users/huzaifah/Library/Arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/Arduino.h:245, from /Users/huzaifah/Downloads/aws-mqtt-websockets-master/examples/aws-mqtt-websocket-example/aws-mqtt-websocket-example.ino:1: /Users/huzaifah/Library/Arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/Print.h:55:24: error: overriding 'virtual size_t Print::write(uint8_t)' virtual size_t write(uint8_t) = 0; ^ aws-mqtt-websocket-example:48: error: 'MQTT' does not name a type MQTT::Client<IPStack, Countdown, maxMQTTpackageSize, maxMQTTMessageHandlers> *client = NULL; ^ aws-mqtt-websocket-example:65: error: variable or field 'messageArrived' declared void void messageArrived(MQTT::MessageData& md) ^ aws-mqtt-websocket-example:65: error: 'MQTT' has not been declared aws-mqtt-websocket-example:65: error: 'md' was not declared in this scope void messageArrived(MQTT::MessageData& md) ^ aws-mqtt-websocket-example:65: error: variable or field 'messageArrived' declared void void messageArrived(MQTT::MessageData& md) ^ aws-mqtt-websocket-example:65: error: 'MQTT' has not been declared aws-mqtt-websocket-example:65: error: 'md' was not declared in this scope void messageArrived(MQTT::MessageData& md) ^ /Users/huzaifah/Downloads/aws-mqtt-websockets-master/examples/aws-mqtt-websocket-example/aws-mqtt-websocket-example.ino: In function 'bool connect()': aws-mqtt-websocket-example:89: error: 'client' was not declared in this scope if (client == NULL) { ^ aws-mqtt-websocket-example:90: error: expected type-specifier before 'MQTT' client = new MQTT::Client<IPStack, Countdown, maxMQTTpackageSize, maxMQTTMessageHandlers>(ipstack); ^ aws-mqtt-websocket-example:90: error: expected ';' before 'MQTT' aws-mqtt-websocket-example:96: error: type '<type error>' argument given to 'delete', expected pointer delete client; ^ aws-mqtt-websocket-example:97: error: expected type-specifier before 'MQTT' client = new MQTT::Client<IPStack, Countdown, maxMQTTpackageSize, maxMQTTMessageHandlers>(ipstack); ^ aws-mqtt-websocket-example:97: error: expected ';' before 'MQTT' aws-mqtt-websocket-example:128: error: 'client' was not declared in this scope rc = client->connect(data); ^ /Users/huzaifah/Downloads/aws-mqtt-websockets-master/examples/aws-mqtt-websocket-example/aws-mqtt-websocket-example.ino: In function 'void subscribe()': aws-mqtt-websocket-example:143: error: 'client' was not declared in this scope int rc = client->subscribe(aws_topic, MQTT::QOS0, messageArrived); ^ aws-mqtt-websocket-example:143: error: 'MQTT' has not been declared int rc = client->subscribe(aws_topic, MQTT::QOS0, messageArrived); ^ aws-mqtt-websocket-example:143: error: 'messageArrived' was not declared in this scope int rc = client->subscribe(aws_topic, MQTT::QOS0, messageArrived); ^ /Users/huzaifah/Downloads/aws-mqtt-websockets-master/examples/aws-mqtt-websocket-example/aws-mqtt-websocket-example.ino: In function 'void sendmessage()': aws-mqtt-websocket-example:155: error: 'MQTT' has not been declared MQTT::Message message; ^ aws-mqtt-websocket-example:155: error: expected ';' before 'message' MQTT::Message message; ^ aws-mqtt-websocket-example:158: error: 'message' was not declared in this scope message.qos = MQTT::QOS0; ^ aws-mqtt-websocket-example:158: error: 'MQTT' has not been declared message.qos = MQTT::QOS0; ^ aws-mqtt-websocket-example:163: error: 'client' was not declared in this scope int rc = client->publish(aws_topic, message); ^ /Users/huzaifah/Downloads/aws-mqtt-websockets-master/examples/aws-mqtt-websocket-example/aws-mqtt-websocket-example.ino: In function 'void loop()': aws-mqtt-websocket-example:198: error: 'client' was not declared in this scope client->yield(); ^ exit status 1 'MQTT' does not name a type

Kindly help me to analyze the situation and find a solution for the same.

[odelot]

You need to remove this library first /Users/huzaifah/Documents/Arduino/libraries/Others/sha256.h

[zaifz]

Thank you.. This worked :)