WIP. Needs PA and GPIO verification

variants/radiomaster_nomad_gemini/platformio.ini

@@ -0,0 +1,20 @@
+[env:radiomaster_nomad_gemini]
+extends = esp32_base
+board = esp32doit-devkit-v1
+build_flags =
+  ${esp32_base.build_flags}
+  -DRADIOMASTER_NOMAD_GEMINI
+  -DPRIVATE_HW
+  -DVTABLES_IN_FLASH=1
+  -DCONFIG_DISABLE_HAL_LOCKS=1
+  -O2
+  -Ivariants/radiomaster_nomad_gemini
+  -DMESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR=1
+  -DMESHTASTIC_EXCLUDE_I2C=1
+  -DRADIOLIB_EXCLUDE_SX128X=1
+  -DRADIOLIB_EXCLUDE_SX127X=1
+  -DRADIOLIB_EXCLUDE_SX126X=1
+board_build.f_cpu = 240000000L
+upload_protocol = esptool
+lib_deps =
+  ${esp32_base.lib_deps}

variants/radiomaster_nomad_gemini/rfswitch.h

@@ -0,0 +1,21 @@
+#include "RadioLib.h"
+
+static const uint32_t rfswitch_dio_pins[] = {RADIOLIB_LR11X0_DIO5, RADIOLIB_LR11X0_DIO6, RADIOLIB_LR11X0_DIO7,
+                                             RADIOLIB_LR11X0_DIO8, RADIOLIB_NC};
+
+static const Module::RfSwitchMode_t rfswitch_table[] = {
+    // mode                  DIO5  DIO6 DIO7 DIO8
+    {LR11x0::MODE_STBY, {LOW, LOW, LOW, LOW}},   {LR11x0::MODE_RX, {LOW, LOW, HIGH, LOW}},
+    {LR11x0::MODE_TX, {LOW, LOW, LOW, HIGH}},    {LR11x0::MODE_TX_HP, {LOW, LOW, LOW, HIGH}},
+    {LR11x0::MODE_TX_HF, {LOW, HIGH, LOW, LOW}}, {LR11x0::MODE_GNSS, {LOW, LOW, LOW, LOW}},
+    {LR11x0::MODE_WIFI, {LOW, LOW, LOW, LOW}},   END_OF_MODE_TABLE,
+};
+
+/*
+
+DIO5: RXEN 2.4GHz
+DIO6: TXEN 2.4GHz
+DIO7: RXEN 900MHz
+DIO8: TXEN 900MHz
+
+*/

variants/radiomaster_nomad_gemini/variant.h

@@ -0,0 +1,51 @@
+#define HAS_SCREEN 0
+#define HAS_WIRE 0
+#define HAS_GPS 0
+#undef GPS_RX_PIN
+#undef GPS_TX_PIN
+
+#define PIN_SPI_MISO 33
+#define PIN_SPI_MOSI 32
+#define PIN_SPI_SCK 25
+#define PIN_SPI_NSS 27
+
+#define LORA_RESET 15
+#define LORA_DIO1 37
+#define LORA_DIO2 36
+#define LORA_SCK PIN_SPI_SCK
+#define LORA_MISO PIN_SPI_MISO
+#define LORA_MOSI PIN_SPI_MOSI
+#define LORA_CS PIN_SPI_NSS
+
+// supported modules list
+#define USE_LR1121
+
+#define LR1121_IRQ_PIN LORA_DIO1
+#define LR1121_NRESET_PIN LORA_RESET
+#define LR1121_BUSY_PIN LORA_DIO2
+#define LR1121_SPI_NSS_PIN LORA_CS
+#define LR1121_SPI_SCK_PIN LORA_SCK
+#define LR1121_SPI_MOSI_PIN LORA_MOSI
+#define LR1121_SPI_MISO_PIN LORA_MISO
+
+// #define LR11X0_DIO3_TCXO_VOLTAGE 1.6
+#define LR11X0_DIO_AS_RF_SWITCH
+
+#define HAS_NEOPIXEL                         // Enable the use of neopixels
+#define NEOPIXEL_COUNT 2                     // How many neopixels are connected
+#define NEOPIXEL_DATA 22                     // GPIO pin used to send data to the neopixels
+#define NEOPIXEL_TYPE (NEO_GRB + NEO_KHZ800) // Type of neopixels in use
+#define ENABLE_AMBIENTLIGHTING               // Turn on Ambient Lighting
+
+#define BUTTON_PIN 34
+#define BUTTON_NEED_PULLUP
+
+#undef EXT_NOTIFY_OUT
+
+#define BAT_MEASURE_ADC_UNIT
+#define BATTERY_PIN 26
+#define ADC_CHANNEL ADC2_GPIO26_CHANNEL
+#define BATTERY_SENSE_SAMPLES 30
+
+// ratio of voltage divider = 2.0 (R42=100k, R43=100k)
+#define ADC_MULTIPLIER 2