There is a notable bug in nRF52-DK with arduino framework

[Navis-Raven]

There is a notable bug with nRF52-DK with arduino framwork, as you can see on github here (see the point 7), click on this link : #33 (comment)

The problematic code is here: https://docs.platformio.org/en/latest/tutorials/nordicnrf52/arduino_debugging_unit_testing.html#writing-unit-tests

there is a problem with function digitalRead since it always returns LOW despite the fact that digitalWrite was called with HIGH value.

IDE: VSCODE with platformio,
SDK/Framwork: Arduino

[Jørgen Holmefjord]

Hi,

You will have to report this issue to the developers of the Arduino code. Nordic does not provide any official support for Arduino.

Best regards,
Jørgen

[Navis-Raven]

This bug with Arduno Framwork occurs only with nRF52-DK hardware and not for Adafruit Huzzah32 and STM32L4 Discovery kit IoT node boards.

So it is a problem between Arduino Framwork and nRF52-DK, and it seems that it is Nordic who has implemented the Arduino Framework into nRF52-DK

[Jørgen Holmefjord]

Thre is most likely a bug in the underlaying libraries mapping arduino functions to nRF52DK registers. Can you provide a link to where it shows that "it seems that it is Nordic who has implemented the Arduino Framework into nRF52-DK"?

[Navis-Raven]

Anyway, If you're sure that is not Nordic I'll try to find, more info about that. 

[Navis-Raven]

Finally This was a documentation issue
you can see here https://github.com/sandeepmistry/arduino-nRF5/issues/308
So we can close this issue