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Updated Compatibility issues (markdown)
Benoît Blanchon
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<!-- MarkdownTOC depth=3 autolink=true bracket=round lowercase_only_ascii=true -->
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- [Arduino Library Manager doesn't list the latest versions of ArduinoJson](#arduino-library-manager-doesnt-list-the-latest-versions-of-arduinojson)
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- [CodeBender](#codebender)
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- [Arduino Zero, mkr1000 and all boards based on SAMD21](#arduino-zero-mkr1000-and-all-boards-based-on-samd21)
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- [Warning: ignoring packed attribute because of unpacked non-POD field](#warning-ignoring-packed-attribute-because-of-unpacked-non-pod-field)
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- [Error: undefined reference to `__cxa_guard_acquire` and `__cxa_guard_release`](#error-undefined-reference-to-cxaguardacquire-and-cxaguardrelease)
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<!-- /MarkdownTOC -->
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Despite the effort on writing portable code, there are compatibility issues with a few platform.
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## Arduino 1.0.x, Energia, Stino and other alternative IDEs
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Energia is a fork or Arduino IDE for TI devices. It has not been updated for the new Arduino library layout.
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Until this gets fix, you need to download the "old-layout" package:
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* ~~[ArduinoJson-v5.0.7.zip](https://github.com/bblanchon/ArduinoJson/releases)~~
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* [ArduinoJson-v5.0.7-old-layout.zip](https://github.com/bblanchon/ArduinoJson/releases)
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For Arduino 1.0.x, see issue [#189](https://github.com/bblanchon/ArduinoJson/issues/189).
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For energia, see issues [#43](https://github.com/bblanchon/ArduinoJson/issues/43), [#97](https://github.com/bblanchon/ArduinoJson/issues/97), [#114](https://github.com/bblanchon/ArduinoJson/issues/114) and [#116](https://github.com/bblanchon/ArduinoJson/issues/116)
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For Stino, see issues [#74](https://github.com/bblanchon/ArduinoJson/issues/74) and [#139](https://github.com/bblanchon/ArduinoJson/issues/139).
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## ESP8266
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Are also conserned all board based on ESP8266: Adafruit HUZZAH, SparkFun Thing, etc.
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There is a known bug in [Arduino core for ESP8266 WiFi chip](https://github.com/esp8266/Arduino) that has been fixed on [August 25th 2015](https://github.com/esp8266/Arduino/commit/47b7bcbeb5d8640205a4d9c2acd8b3817fd3caaa).
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Please make sure you're using a newer version before posting a new issue.
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~~As I'm writing theses lines, you need to use the "staging" version because the "stable" version is too old.~~
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See issues [#101](https://github.com/bblanchon/ArduinoJson/issues/101), [#125](https://github.com/bblanchon/ArduinoJson/issues/125), [#155](https://github.com/bblanchon/ArduinoJson/issues/155) and [#185](https://github.com/bblanchon/ArduinoJson/issues/185) and [#233](https://github.com/bblanchon/ArduinoJson/issues/233).
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## Intel Edison: compilation error
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This is a known bug in [Arduino core for Intel Edison](https://github.com/01org/corelibs-edison).
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A [pull request](https://github.com/01org/corelibs-edison/pull/18) has been submitted ~~but is still waiting for approval.~~
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Until this gets fixed, just insert the following line in your local `cores/arduino/WString.h`:
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const char * c_str() const { return buffer; }
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On Windows, the file is likely to be located here:
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```
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%LOCALAPPDATA%\Arduino15\packages\Intel\hardware\i686\1.6.2+1.0\cores\arduino\WString.h
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```
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See issues [#123](https://github.com/bblanchon/ArduinoJson/issues/123) and [#138](https://github.com/bblanchon/ArduinoJson/issues/138)
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## Intel Galileo: compilation error
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This is a known bug in [Arduino core for Intel Galileo](https://github.com/01org/corelibs-galileo).
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A [pull request](https://github.com/01org/corelibs-galileo/pull/29) has been submitted ~~but is still waiting for approval~~.
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Until this gets fixed, just insert the following line in your local `cores/arduino/WString.h`:
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const char * c_str() const { return buffer; }
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On Windows, the file is likely to be located here:
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```
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%LOCALAPPDATA%\Arduino15\packages\Intel\hardware\i586\1.6.7+1.0\cores\arduino\WString.h
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```
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on mac
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```
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~/Library/Arduino15/packages/Intel/hardware/i586/1.6.7+1.0/cores/arduino/WString.h
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```
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See issue [#299](https://github.com/bblanchon/ArduinoJson/issues/299).
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## RedBearLab boards: compilation error
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This is a known bug in [Arduino core for BLE Nano](https://github.com/RedBearLab/nRF51822-Arduino).
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A [pull request](https://github.com/RedBearLab/nRF51822-Arduino/pull/57) has been submitted ~~but is still waiting for approval.~~
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Until this gets fixed, just insert the following line in your local `cores/arduino/WString.h`:
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const char * c_str() const { return buffer; }
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On Windows, the file is likely to be located here:
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```
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%LOCALAPPDATA%\Arduino15\packages\RedBearLab\hardware\nRF51822\1.0.5\cores\RBL_nRF51822\WString.h
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```
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See issue [#222](https://github.com/bblanchon/ArduinoJson/issues/222)
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## Teensy, and other Arduino compatible boards
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Some platforms need some time to initialize the serial port.
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In that case, you need to add a `delay(1000)` in the `setup()` function.
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See issue [#112](https://github.com/bblanchon/ArduinoJson/issues/112).
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## Known problems with Arduino IDE 1.6.6
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Arduino IDE 1.6.6 bug [#4075](https://github.com/arduino/Arduino/issues/4075) makes the build fail with the following error:
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```
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error: 'namespaceArduinoJson' does not name a type
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```
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You need to upgrade to 1.6.7.
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## Arduino Library Manager doesn't list the latest versions of ArduinoJson
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This is a very common issue.
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@@ -114,31 +24,13 @@ For example, on Windows, you need to delete:
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You don't even need to close Arduino, just re-open the library manager.
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## Visual Micro / Visual Studio
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Due to the non-standard library structure, ArduinoJson won't compile for older versions of Visual Micro - the solution is simply to upgrade to Visual Micro from January 2016 or later.
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See issue [#238](https://github.com/bblanchon/ArduinoJson/issues/238).
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## WifiManager
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There is a [known bug](https://github.com/tzapu/WiFiManager/commit/44e828e77a2454a38371f7d5fb64424acebeb676) in the WifiManager library < 0.12.
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This caused a compilation error in ArduinoJson:
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ArduinoJson/include/ArduinoJson/Internals/../Internals/../Polyfills/isNaN.hpp:29:17: error: 'isnan' was not declared in this scope
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To fix the issue, simply upgrade WifiManager to >= 0.12 or ArduinoJson >= 5.6.2
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See issue [#284](https://github.com/bblanchon/ArduinoJson/issues/284)
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## CodeBender
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For some reason, it's not possible to use ArduinoJson with CodeBender.
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See discussion here: http://feedback.codebender.cc/forums/280538-library-requests/suggestions/7238254-arduinojson-support
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## Arduino Zero and mkr1000 (all boards based on SAMD21)
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## Arduino Zero, mkr1000 and all boards based on SAMD21
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There is a bug in [Arduino SAMD core](https://github.com/arduino/ArduinoCore-samd) that make `prettyPrintTo()` fail (issue [#327](https://github.com/bblanchon/ArduinoJson/issues/327))
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@@ -154,7 +46,7 @@ They are located here on Windows:
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%LOCALAPPDATA%\Arduino15\packages\arduino\hardware\samd\1.6.6\cores\arduino\USB
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```
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## GCC warning: ignoring packed attribute because of unpacked non-POD field
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## Warning: ignoring packed attribute because of unpacked non-POD field
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If you pass the flag `--fpack-struct` to the compiler, it will generate the following warning:
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@@ -166,3 +58,11 @@ No solution has been found so far: you need to remove that flag if you want to g
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See issue [#255](https://github.com/bblanchon/ArduinoJson/issues/255)
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## Error: undefined reference to `__cxa_guard_acquire` and `__cxa_guard_release`
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You need to add the following flag:
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> `-fno-threadsafe-statics`
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> Do not emit the extra code to use the routines specified in the C++ ABI for thread-safe initialization of local statics. You can use this option to reduce code size slightly in code that doesn't need to be thread-safe.
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>
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See issue [#356](https://github.com/bblanchon/ArduinoJson/issues/356).
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