ESP32: Initial sort variants by platform (#7340)

variants/esp32/betafpv_2400_tx_micro/platformio.ini

@@ -0,0 +1,18 @@
+[env:betafpv_2400_tx_micro]
+extends = esp32_base
+board = esp32doit-devkit-v1
+board_level = extra
+build_flags =
+  ${esp32_base.build_flags}
+  -D BETAFPV_2400_TX
+  -D VTABLES_IN_FLASH=1
+  -D CONFIG_DISABLE_HAL_LOCKS=1
+  -O2
+  -I variants/esp32/betafpv_2400_tx_micro
+board_build.f_cpu = 240000000L
+upload_protocol = esptool
+;upload_port = /dev/ttyUSB0
+upload_speed = 460800
+lib_deps =
+  ${esp32_base.lib_deps}
+  adafruit/Adafruit NeoPixel @ ^1.12.0

variants/esp32/betafpv_2400_tx_micro/variant.h

@@ -0,0 +1,37 @@
+// https://betafpv.com/products/elrs-micro-tx-module
+
+// 0.96" OLED
+#define I2C_SDA 22
+#define I2C_SCL 32
+
+// NO GPS
+#undef GPS_RX_PIN
+#undef GPS_TX_PIN
+
+#define LORA_SCK 18
+#define LORA_MISO 19
+#define LORA_MOSI 23
+#define LORA_CS 5
+#define RF95_FAN_EN 17
+
+// #define LED_PIN 16 // This is a LED_WS2812 not a standard LED
+#define HAS_NEOPIXEL                         // Enable the use of neopixels
+#define NEOPIXEL_COUNT 1                     // How many neopixels are connected
+#define NEOPIXEL_DATA 16                     // gpio pin used to send data to the neopixels
+#define NEOPIXEL_TYPE (NEO_GRB + NEO_KHZ800) // type of neopixels in use
+
+#define BUTTON_PIN 25
+#define BUTTON_NEED_PULLUP
+
+#undef EXT_NOTIFY_OUT
+
+// SX128X 2.4 Ghz LoRa module
+#define USE_SX1280
+#define LORA_RESET 14
+#define SX128X_CS 5
+#define SX128X_DIO1 4
+#define SX128X_BUSY 21
+#define SX128X_TXEN 26
+#define SX128X_RXEN 27
+#define SX128X_RESET LORA_RESET
+#define SX128X_MAX_POWER 3