Added arduino uno backward compatibility pins (#8833)

Co-authored-by: Jan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com>

variants/doitESPduino32/pins_arduino.h

@@ -53,6 +53,42 @@ static const uint8_t CLK = 6;
 static const uint8_t SD0 = 7;
 static const uint8_t SD1 = 8;
 
+//Arduino Uno backward compatibility
+static const uint8_t A0 = 2;
+static const uint8_t A1 = 4;
+static const uint8_t A2 = 35;
+static const uint8_t A3 = 34;
+static const uint8_t A4 = 36;
+static const uint8_t A5 = 39;
+
+static const uint8_t D0   = 3;
+static const uint8_t D1   = 1;
+static const uint8_t D2   = 26;
+static const uint8_t D3   = 25;
+static const uint8_t D4   = 17;
+static const uint8_t D5   = 16;
+static const uint8_t D6   = 27;
+static const uint8_t D7   = 14;
+static const uint8_t D8   = 12;
+static const uint8_t D9   = 13;
+static const uint8_t D10  = 5;
+static const uint8_t D11  = 23;
+static const uint8_t D12  = 19;
+static const uint8_t D13  = 18;
+
+static const uint8_t TX = 1;
+static const uint8_t RX = 3;
+
+#define PIN_WIRE_SDA SDA // backward compatibility
+#define PIN_WIRE_SCL SCL // backward compatibility
+
+#define PIN_SPI_SS   SS   // backward compatibility
+#define PIN_SPI_MOSI MOSI // backward compatibility
+#define PIN_SPI_MISO MISO // backward compatibility
+#define PIN_SPI_SCK  SCK  // backward compatibility
+
+#define PIN_A0 A0 // backward compatibility
+
 // ESP-WROOM-32 does not have GPIO 14, 20(NC), 24, 28, 29, 30, 31, 36, 37, 38, 40+
 // All pins should be PWM capable. The board is a clone of WeMos D1 R32.