error on MQTTClient.cpp file on compiling

[D4rkd3vilchipihc]

Hi

I have tried to compile this project and I got those errors

{
"resource": "arduino projects/MQTT433gateway-master/lib/MQTT/MqttClient.cpp",
"owner": "generated_diagnostic_collection_name#1",
"severity": 8,
"message": "argument of type "const char (String::)() const" is incompatible with parameter of type "void *"",
"startLineNumber": 40,
"startColumn": 14,
"endLineNumber": 40,
"endColumn": 20
}

{
"resource": "arduino projects/MQTT433gateway-master/lib/MQTT/MqttClient.cpp",
"owner": "cpp",
"severity": 8,
"message": "cannot convert 'String::buffer' from type 'const char* (String::)()const' to",
"startLineNumber": 40,
"startColumn": 34,
"endLineNumber": 40,
"endColumn": 34
}

{
"resource": "arduino projects/MQTT433gateway-master/lib/MQTT/MqttClient.cpp",
"owner": "cpp",
"severity": 8,
"message": "cannot convert 'String::buffer' from type 'const char* (String::)()const' to type 'void*'",
"startLineNumber": 40,
"startColumn": 34,
"endLineNumber": 40,
"endColumn": 34
}

{
"resource": "arduino projects/MQTT433gateway-master/lib/MQTT/MqttClient.cpp",
"owner": "generated_diagnostic_collection_name#1",
"severity": 8,
"message": "expression must be a modifiable lvalue",
"startLineNumber": 41,
"startColumn": 7,
"endLineNumber": 41,
"endColumn": 10
}

{
"resource": "arduino projects/MQTT433gateway-master/lib/MQTT/MqttClient.cpp",
"owner": "cpp",
"severity": 8,
"message": "invalid use of member function (did you forget the '()' ?)",
"startLineNumber": 41,
"startColumn": 11,
"endLineNumber": 41,
"endColumn": 11
}

{
"resource": "arduino projects/MQTT433gateway-master/lib/MQTT/MqttClient.cpp",
"owner": "generated_diagnostic_collection_name#1",
"severity": 8,
"message": "identifier "fwJsonVersion" is undefined",
"startLineNumber": 91,
"startColumn": 28,
"endLineNumber": 91,
"endColumn": 41
}

I'm new at this, I'll try to debug and correct this but your help would be much appreciated

thanks in advance :)

[puuu]

Thanks for pointing out this compilation problem. It is introduced by a new version of the platform espressif8266 version 2.1.0. Due to changes in the String API (esp8266/Arduino#5690).

A fix can be found in the espressif8266_2.1.0 branch. Unfortunately, this update breaks the compilation with older versions of espressif8266.

I'll do some testing before it gets into the master branch.

[puuu]

Fixed in master branch.