Create GaulixLCrp2040V1b

https://gaulix.fr/carte-gaulix-low-cost-30dbm/

variants/GaulixLCrp2040V1b

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+#define ARDUINO_ARCH_AVR
+
+// Define I2C pins to ensure correct usage of both ports
+#define I2C_SDA 20
+#define I2C_SCL 21
+#define I2C_SDA1 10
+#define I2C_SCL1 11
+
+#define LED_CONN PIN_LED2
+#define LED_PIN LED_BUILTIN
+#define ledOff(pin) pinMode(pin, INPUT)
+
+#define BUTTON_PIN 12
+#define BUTTON_NEED_PULLUP
+#define EXT_NOTIFY_OUT 22
+
+#define BATTERY_PIN PIN_A0 //3 //29     0 //26
+// ratio of voltage divider = 3.0 (R17=200k, R18=100k)
+#define ADC_MULTIPLIER 3.05 //3.065 //3.33 //1.84
+#define BATTERY_SENSE_RESOLUTION_BITS ADC_RESOLUTION
+
+#define DETECTION_SENSOR_EN 28
+
+#define USE_SX1262
+
+#undef LORA_SCK
+#undef LORA_MISO
+#undef LORA_MOSI
+#undef LORA_CS
+
+// RAK BSP somehow uses SPI1 instead of SPI0
+#define HW_SPI1_DEVICE
+#define LORA_SCK (14u)
+#define LORA_MOSI (15u)
+#define LORA_MISO (24u)
+#define LORA_CS (13u)
+
+#define LORA_DIO0 RADIOLIB_NC // No GPIO connection
+#define LORA_RESET 23         // GPIO23
+#define LORA_BUSY 18          // GPIO18
+#define LORA_DIO1 16          // GPIO16
+#define LORA_DIO2 RADIOLIB_NC // Antenna switching, no GPIO connection
+#define LORA_DIO3 RADIOLIB_NC // No GPIO connection
+#define LORA_DIO4 17          // GPIO17
+
+// On rp2040-lora board the antenna switch is wired and works with complementary-pin control logic.
+// See PE4259 datasheet page 4
+
+#ifdef USE_SX1262
+#define SX126X_CS LORA_CS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_BUSY
+#define SX126X_RESET LORA_RESET
+#define SX126X_DIO2_AS_RF_SWITCH // Antenna switch CTRL
+#define SX126X_RXEN LORA_DIO4    // Antenna switch !CTRL via GPIO17
+//#define SX126X_TXEN 19
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+#endif
+
+#define HAS_ETHERNET 1
+#define PIN_ETHERNET_RESET 7 // IO3
+#define PIN_ETHERNET_SS 5
+#define ETH_SPI_PORT SPI
+
+#define PIN_ETH_POWER_EN 6
+
+#define MAX_NUM_NODES 500
+#define MAX_NUM_NODES_FS 500