Add Hardware: BetaFPV 900 Nano TX (#2249)

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/platform/esp32/architecture.h

@@ -97,6 +97,8 @@
 #define HW_VENDOR meshtastic_HardwareModel_BETAFPV_2400_TX
 #elif defined(NANO_G1_EXPLORER)
 #define HW_VENDOR meshtastic_HardwareModel_NANO_G1_EXPLORER
+#elif defined(BETAFPV_900_TX_NANO)
+#define HW_VENDOR meshtastic_HardwareModel_BETAFPV_900_NANO_TX
 #endif
 
 //

variants/betafpv_900_tx_nano/platformio.ini

@@ -0,0 +1,16 @@
+[env:betafpv_900_tx_nano]
+extends = esp32_base
+board = esp32doit-devkit-v1
+build_flags =
+  ${esp32_base.build_flags}
+  -D BETAFPV_900_TX_NANO
+  -D VTABLES_IN_FLASH=1
+  -D CONFIG_DISABLE_HAL_LOCKS=1
+  -O2
+  -I variants/betafpv_900_tx_nano
+board_build.f_cpu = 240000000L
+upload_protocol = esptool
+upload_port = /dev/ttyUSB0
+upload_speed = 460800
+lib_deps =
+  ${esp32_base.lib_deps}

variants/betafpv_900_tx_nano/variant.h

@@ -0,0 +1,28 @@
+// https://betafpv.com/products/elrs-nano-tx-module
+
+// no screen
+#define HAS_SCREEN 0
+
+// NO GPS
+#undef GPS_RX_PIN
+#undef GPS_TX_PIN
+
+#define USE_RF95
+
+#define RF95_SCK 18
+#define RF95_MISO 19
+#define RF95_MOSI 23
+#define RF95_NSS 5
+
+#define LORA_DIO0 4
+#define LORA_RESET 14
+#define LORA_DIO1 2
+#define LORA_DIO2
+#define LORA_DIO3
+
+#define LED_PIN 16 // green - blue is at 17
+
+#define BUTTON_PIN 25
+#define BUTTON_NEED_PULLUP
+
+#undef EXT_NOTIFY_OUT