ESP32: Initial sort variants by platform (#7340)

variants/esp32/trackerd/platformio.ini

@@ -0,0 +1,8 @@
+[env:trackerd]
+extends = esp32_base
+board = pico32
+board_build.f_flash = 80000000L
+
+build_flags = 
+  ${esp32_base.build_flags} -D PRIVATE_HW -I variants/esp32/trackerd -D BSFILE=\"boards/dragino_lbt2.h\"
+;board_build.partitions = no_ota.csv

variants/esp32/trackerd/variant.h

@@ -0,0 +1,53 @@
+// Initialize i2c bus on sd_dat and esp_led pins, respectively. We need a bus to not hang on boot
+#define HAS_SCREEN 0
+#define I2C_SDA 21
+#define I2C_SCL 22
+
+#undef GPS_RX_PIN
+#undef GPS_TX_PIN
+#define GPS_RX_PIN 9
+#define GPS_TX_PIN 10
+
+#define LED_PIN 13 // 13 red, 2 blue, 15 red
+
+// #define HAS_BUTTON 0
+#define BUTTON_PIN 0
+#define BUTTON_NEED_PULLUP
+
+#define USE_RF95
+#define LORA_DIO0 26 // a No connect on the SX1262 module
+#define LORA_RESET 23
+#define LORA_DIO1 33
+#define LORA_DIO2 32 // Not really used
+
+#undef BAT_MEASURE_ADC_UNIT
+#define BATTERY_PIN 35      // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
+#define ADC_MULTIPLIER 1.34 //  tracked resistance divider is 100k+470k, so it can not fillfull well on esp32 adc
+#define ADC_CHANNEL ADC1_GPIO35_CHANNEL
+#define ADC_ATTENUATION ADC_ATTEN_DB_12 // lower dB for high resistance voltage divider
+
+#undef GPS_RX_PIN
+#undef GPS_TX_PIN
+#undef PIN_GPS_PPS
+
+#define PIN_GPS_EN 12
+#define GPS_EN_ACTIVE 1
+
+#define GPS_TX_PIN 10
+#define GPS_RX_PIN 9
+
+#define PIN_GPS_RESET 25
+// #define PIN_GPS_REINIT 25
+#define GPS_RESET_MODE 1
+
+#define GPS_L76K
+
+#undef PIN_LED1
+#undef PIN_LED2
+#undef PIN_LED3
+
+#define PIN_LED1 13
+#define PIN_LED2 15
+#define PIN_LED3 2
+
+#define ledOff(pin) pinMode(pin, INPUT)