Add LINK32 (Lilygo) Board with Light+Environment sensors

TODO: replace PRIVATE_HW with actual HWID

variants/link32_s3_v1/pins_arduino.h

@@ -0,0 +1,19 @@
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+
+#define USB_VID 0x303a
+#define USB_PID 0x1001
+
+// The default Wire will be mapped to PMU and RTC
+static const uint8_t SDA = 47;
+static const uint8_t SCL = 48;
+
+// Default SPI will be mapped to Radio
+static const uint8_t SS = 21;
+static const uint8_t MOSI = 34;
+static const uint8_t MISO = 33;
+static const uint8_t SCK = 16;
+
+#endif /* Pins_Arduino_h */

variants/link32_s3_v1/platformio.ini

@@ -0,0 +1,12 @@
+[env:link32-s3-v1]
+extends = esp32s3_base
+board = esp32-s3-devkitc-1
+build_flags = 
+  ${esp32_base.build_flags} -D PRIVATE_HW -I variants/link32_s3_v1
+  -DGPS_POWER_TOGGLE ; comment this line to disable triple press function on the user button to turn off gps entirely.
+  -DARDUINO_USB_CDC_ON_BOOT
+  -DARDUINO_USB_MODE=1
+  -DRADIOLIB_EXCLUDE_SX128X=1
+  -DRADIOLIB_EXCLUDE_SX127X=1
+  -DRADIOLIB_EXCLUDE_LR11X0=1
+  

variants/link32_s3_v1/variant.h

@@ -0,0 +1,42 @@
+#define BATTERY_PIN 15
+#define ADC_CHANNEL ADC2_GPIO15_CHANNEL // ADC channel for battery voltage measurement
+#define BATTERY_SENSE_SAMPLES 30
+#define BAT_MEASURE_ADC_UNIT 2 // Use ADC2 for battery measurement
+
+#define USE_SSD1306
+
+#define BUTTON_PIN 0 // Button pin for this board
+#define BUTTON_PIN_ALT 36
+
+#define HAS_NEOPIXEL // If defined, we will use the neopixel library
+#define NEOPIXEL_DATA 35 // Neopixel pin for this board
+#define NEOPIXEL_COUNT 1 // Number of neopixels on this board
+#define NEOPIXEL_TYPE (NEO_GRB + NEO_KHZ800) // type of neopixels in use
+
+#define ADC_MULTIPLIER 2
+
+#define I2C_SDA 47 // I2C pins for this board
+#define I2C_SCL 48
+
+#define USE_SX1262
+
+#define LORA_SCK 16
+#define LORA_MISO 33
+#define LORA_MOSI 34
+#define LORA_CS 21
+#define LORA_RESET 18
+
+#define LORA_DIO0 12 // a No connect on the SX1262 module
+#define LORA_DIO1 13
+#define LORA_DIO2 14 // Not really used
+
+#define LORA_TCXO_GPIO 17
+
+#define TCXO_OPTIONAL
+
+#define SX126X_CS LORA_CS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+#define SX126X_DIO2_AS_RF_SWITCH
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8