[Enhancement] Add a digitalRead SPI command

[anecdata]

nina-fw currently supports pinMode, analogWrite, and DigitalWrite. It would be very useful to also be able to read from the ESP32's digital pins via SPI from an attached processor.

[xelll]

it's also useful to be able to read anlog pins value

[anecdata]

Some use cases:

• GPIO expansion;
• Adafruit ESP32 Feather has battery voltage on (unexposed) pin A13 / I35;
• Ability to read specially-configured ESP32 co-processor inputs would allow the main processor to determine the form factor of the attached ESP32 co-processor (e.g., Adafruit Airlift Breakout vs. Adafruit ESP32 Feather vs. Adafruit ESP32 Breakout, etc.), and adapt to its unique capabilities.

[sandeepmistry]

Hi @anecdata,

At this time, we are not interested in implementing this feature, I'm marking the issue as won't fix.

[anecdata]

Now implemented as part of #67

[xelll]

Now implemented as part of #67

👍