Thingsboard provisioning example not working - thingsboard

Question

For some reason https://github.com/thingsboard/thingsboard-arduino-sdk/blob/master/examples/0008-esp8266_provision_device/0008-esp8266_provision_device.ino is not compiling on Windows Arduino IDE 1.8.19 for FireBeetle ESP32. Error as follows:
Arduino: 1.8.19 (Windows 10), Board: "FireBeetle ESP32-E, Disabled, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 240MHz (WiFi/BT), QIO, 80MHz, 4MB (32Mb), 921600, Core 1, Core 1, None"
C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:7: warning: "WIFI_AP" redefined
#define WIFI_AP "Lemmiku IoT"
In file included from C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi\src/WiFi.h:31,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:4:
C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi\src/WiFiType.h:32: note: this is the location of the previous definition
#define WIFI_AP WIFI_MODE_AP
Provision_test:86:46: error: conversion from 'void(Provision_Data&)' {aka 'void(const ArduinoJson6194_F1::ObjectConstRef&)'} to non-scalar type 'const Provision_Callback' requested
const Provision_Callback provisionCallback = processProvisionResponse;
^~~~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.hpp:24,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.h:9,
from C:\Users\Timo\Documents\Arduino\libraries\ThingsBoard\src/ThingsBoard.h:16,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:2:
C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp: In instantiation of 'typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type ArduinoJson6194_F1::VariantConstRef::as() const [with T = ArduinoJson6194_F1::ObjectRef; typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type = ArduinoJson6194_F1::ObjectRef]':
C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:75:76: required from here
C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:253:34: error: invalid use of incomplete type 'class ArduinoJson6194_F1::InvalidConversion<ArduinoJson6194_F1::VariantConstRef, ArduinoJson6194_F1::ObjectRef>'
return Converter::fromJson(*this);
~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
In file included from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:14,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.hpp:24,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.h:9,
from C:\Users\Timo\Documents\Arduino\libraries\ThingsBoard\src/ThingsBoard.h:16,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:2:
C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/Converter.hpp:14:7: note: declaration of 'class ArduinoJson6194_F1::InvalidConversion<ArduinoJson6194_F1::VariantConstRef, ArduinoJson6194_F1::ObjectRef>'
class InvalidConversion; // Error here? See https://arduinojson.org/v6/invalid-conversion/
^~~~~~~~~~~~~~~~~
Multiple libraries were found for "WiFi.h"
Used: C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi
Not used: C:\Users\Timo\Documents\Arduino\libraries\WiFiEspAT
Not used: C:\Program Files (x86)\Arduino\libraries\WiFi
exit status 1
conversion from 'void(Provision_Data&)' {aka 'void(const ArduinoJson6194_F1::ObjectConstRef&)'} to non-scalar type 'const Provision_Callback' requested
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
Can anyone help out why it's not working?
#devaskim I tried, but nothing:
C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:6: warning: "WIFI_AP" redefined
#define WIFI_AP "Lemmiku IoT"
In file included from C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi\src/WiFi.h:31,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:3:
C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi\src/WiFiType.h:32: note: this is the location of the previous definition
#define WIFI_AP WIFI_MODE_AP
Provision_test:85:46: error: conversion from 'void (*)(Provision_Data&)' {aka 'void (*)(const ArduinoJson6194_F1::ObjectConstRef&)'} to non-scalar type 'const Provision_Callback' requested
const Provision_Callback provisionCallback = &processProvisionResponse;
^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.hpp:24,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.h:9,
from C:\Users\Timo\Documents\Arduino\libraries\ThingsBoard\src/ThingsBoard.h:16,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:2:
C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp: In instantiation of 'typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type ArduinoJson6194_F1::VariantConstRef::as() const [with T = ArduinoJson6194_F1::ObjectRef; typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type = ArduinoJson6194_F1::ObjectRef]':
C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:74:76: required from here
C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:253:34: error: invalid use of incomplete type 'class ArduinoJson6194_F1::InvalidConversion<ArduinoJson6194_F1::VariantConstRef, ArduinoJson6194_F1::ObjectRef>'
return Converter<T>::fromJson(*this);
~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
In file included from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:14,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.hpp:24,
from C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.h:9,
from C:\Users\Timo\Documents\Arduino\libraries\ThingsBoard\src/ThingsBoard.h:16,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:2:
C:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/Converter.hpp:14:7: note: declaration of 'class ArduinoJson6194_F1::InvalidConversion<ArduinoJson6194_F1::VariantConstRef, ArduinoJson6194_F1::ObjectRef>'
class InvalidConversion; // Error here? See https://arduinojson.org/v6/invalid-conversion/
^~~~~~~~~~~~~~~~~
Multiple libraries were found for "WiFi.h"
Used: C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi
Not used: C:\Program Files (x86)\Arduino\libraries\WiFi
Not used: C:\Users\Timo\Documents\Arduino\libraries\WiFiEspAT
exit status 1
conversion from 'void (*)(Provision_Data&)' {aka 'void (*)(const ArduinoJson6194_F1::ObjectConstRef&)'} to non-scalar type 'const Provision_Callback' requested
Hmm, I got something different this time:
C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:6: warning: "WIFI_AP" redefined
#define WIFI_AP "Lemmiku IoT"
In file included from C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi\src/WiFi.h:31,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:3:
C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi\src/WiFiType.h:32: note: this is the location of the previous definition
#define WIFI_AP WIFI_MODE_AP
In file included from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.hpp:24,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.h:9,
from c:\Users\Timo\Documents\Arduino\libraries\ThingsBoard\src/ThingsBoard.h:16,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:2:
c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp: In instantiation of 'typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type ArduinoJson6194_F1::VariantConstRef::as() const [with T = ArduinoJson6194_F1::ObjectRef; typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type = ArduinoJson6194_F1::ObjectRef]':
C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:74:76: required from here
c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:253:34: error: invalid use of incomplete type 'class ArduinoJson6194_F1::InvalidConversion<ArduinoJson6194_F1::VariantConstRef, ArduinoJson6194_F1::ObjectRef>'
return Converter<T>::fromJson(*this);
~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
In file included from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRef.hpp:14,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayIterator.hpp:8,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Array/ArrayRef.hpp:8,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.hpp:24,
from c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson.h:9,
from c:\Users\Timo\Documents\Arduino\libraries\ThingsBoard\src/ThingsBoard.h:16,
from C:\Users\Timo\Documents\Arduino\Provision_test\Provision_test.ino:2:
c:\Users\Timo\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/Converter.hpp:14:7: note: declaration of 'class ArduinoJson6194_F1::InvalidConversion<ArduinoJson6194_F1::VariantConstRef, ArduinoJson6194_F1::ObjectRef>'
class InvalidConversion; // Error here? See https://arduinojson.org/v6/invalid-conversion/
^~~~~~~~~~~~~~~~~
Multiple libraries were found for "WiFi.h"
Used: C:\Users\Timo\AppData\Local\Arduino15\packages\DFRobot\hardware\esp32\0.2.1\libraries\WiFi
Not used: C:\Users\Timo\Documents\Arduino\libraries\WiFiEspAT
exit status 1
Compilation error: exit status 1

Answer 1

As you've already noticed, there are two issues to fix, which I've highlighted in the code sample below.
There is also an open issue about this here: https://github.com/thingsboard/thingsboard-arduino-sdk/issues/89
Note that while this fixes the compilation issues, at least my self-hosted ThingsBoard server fails to register the provisioning request, so there's likely more that's broken with it.
// ...
// FIX #1
//
// We're dealing with const data
//
//JsonObject credentials_value = data["credentialsValue"].as<JsonObject>();
JsonObjectConst credentials_value = data["credentialsValue"].as<JsonObjectConst>();
// ...
// FIX #2
//
// Provision_Callback is a class that takes the callback as a constructor parameter
//
//const Provision_Callback provisionCallback = processProvisionResponse;
const Provision_Callback provisionCallback(processProvisionResponse);
// ...