TTGOv2.1 support added

src/hal/ttgov21.h

@@ -0,0 +1,28 @@
+// Hardware related definitions for TTGO V2.1 Board
+// NOT YET TESTED
+
+#define CFG_sx1276_radio 1 // HPD13A LoRa SoC
+
+#define HAS_DISPLAY U8X8_SSD1306_128X64_NONAME_HW_I2C
+#define DISPLAY_FLIP  1 // rotated display
+#define HAS_LED 23
+
+// disable brownout detection (needed on TTGOv2 for battery powered operation)
+#define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
+
+// re-define pin definitions of pins_arduino.h
+#define PIN_SPI_SS    18 // ESP32 GPIO18 (Pin18) -- HPD13A NSS/SEL (Pin4) SPI Chip Select Input
+#define PIN_SPI_MOSI  27 // ESP32 GPIO27 (Pin27) -- HPD13A MOSI/DSI (Pin6) SPI Data Input
+#define PIN_SPI_MISO  19 // ESP32 GPIO19 (Pin19) -- HPD13A MISO/DSO (Pin7) SPI Data Output
+#define PIN_SPI_SCK   5  // ESP32 GPIO5 (Pin5)   -- HPD13A SCK (Pin5) SPI Clock Input
+
+// non arduino pin definitions
+#define RST   LMIC_UNUSED_PIN // connected to ESP32 RST/EN
+#define DIO0  26 // ESP32 GPIO26 wired on PCB to HPD13A
+#define DIO1  32 
+#define DIO2  33
+
+// Hardware pin definitions for TTGO V2 Board with OLED SSD1306 0,96" I2C Display
+#define OLED_RST U8X8_PIN_NONE // connected to CPU RST/EN
+#define OLED_SDA 21  // ESP32 GPIO4 (Pin4)   -- SD1306 D1+D2
+#define OLED_SCL 22 // ESP32 GPIO15 (Pin15) -- SD1306 D0