ESP32: Initial sort variants by platform (#7340)

variants/esp32/nano-g1/variant.h

@@ -0,0 +1,36 @@
+// #define BUTTON_NEED_PULLUP // if set we need to turn on the internal CPU pullup during sleep
+
+#define I2C_SDA 21
+#define I2C_SCL 22
+
+#define BUTTON_PIN 36     // The middle button GPIO on the Nano G1
+#define EXT_NOTIFY_OUT 13 // Default pin to use for Ext Notify Module.
+
+// common pinout for their SX1262 vs RF95 modules - both can be enabled and we will probe at runtime for RF95 and if
+// not found then probe for SX1262
+#define USE_RF95
+#define USE_SX1262
+
+#define GPS_RX_PIN 34
+#define GPS_TX_PIN 12
+
+#define LORA_DIO0 26 // a No connect on the SX1262 module
+#define LORA_RESET 23
+#define LORA_DIO1 33 // SX1262 IRQ
+#define LORA_DIO2 32 // SX1262 BUSY
+#define LORA_DIO3    // Not connected on PCB
+
+#ifdef USE_SX1262
+#define SX126X_CS LORA_CS // FIXME - we really should define LORA_CS instead
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+// Not really an E22
+#define SX126X_DIO2_AS_RF_SWITCH
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+// Internally the module hooks the SX1262-DIO2 in to control the TX/RX switch (which is the default for the sx1262interface
+// code)
+#endif
+
+// different screen
+#define USE_SH1106