Make universal pin labelling

[cewbdex]

Label ESP32 and AVR pins so they can be accessed universally (Eg. D1, A1).

• Digital pins
• Analog pins
• Specify common pins for eg. I2C, SPI - needs resolve of Přidat konektory pro I2C a SPI ArduinoLearningKitStarter#21 first
• Test everything on a real board SKIPPED - ups, but should work
• Merge Arduino ESP32 Add ALKS board variant espressif/arduino-esp32#1643
• Merge PIO ESP32 Add ALKS ESP32 board variant platformio/platform-espressif32#113

[cewbdex]

Ax are not possible to map on ESP32, because it already defines "ESP32 Dev Module".

[yaqwsx]

What is the problem exactly?

[JarekParal]

There is already #define A1 pinX probably. Is it true @CornyjK?

And what about create own board configuration for ALKS (for Arduino/PlatformIO)?

ESP32 ALKS ...

[cewbdex]

@JarekParal
Adding new board to boards.txt and making it's /variants/ file would work, it would also eliminate requirement of this library (at least pin definitions) for ESP32. Or you meant another way? Maybie they would accept pull request with our board variant.
EDIT:
Yes, it's already defined in /variants/ESP32/pins_arduino.h.
Switching to "Electronic SweetPeas - ESP320" would solve this issue, but it does not give ability to change certain things (eg. flash mode and flash size).

[JarekParal]

It would be nice to have own board.txt (or pins_arduino.h) and send pull request to Arduino and PlatformIO.

[JarekParal]

What we will do with this @CornyjK :-)?

Are the digital pins (D1, D2, ...) on ESP32 implemented?

[cewbdex]

@JarekParal
In this PR

[JarekParal]

Ok, could you send pull-request @CornyjK?

[cewbdex]

@JarekParal
I think it should be completed first (third point above, also second - send pull request to ESP32 library). In my opinion this should be in next release.

[JarekParal]

I agree with your answer @CornyjK. Could you define pins in this library for SPI, I2C on the ESP32 as I mentioned in the issue RoboticsBrno/ArduinoLearningKitStarter#21.

[cewbdex]

Here is preview of file for PR.

[cewbdex]

SPI/IIC has the same issue as the analog pins.

[JarekParal]

You can set the pins for I2C and SPI on ESP32 in this functions as begin() parameters:

• https://github.com/espressif/arduino-esp32/blob/master/libraries/Wire/src/Wire.h#L55
• https://github.com/espressif/arduino-esp32/blob/master/libraries/SPI/src/SPI.h#L55