Initial T-Echo support

Boards.h

@@ -95,6 +95,11 @@
   #define MODEL_C6            0xC6 // Heltec Mesh Node T114, 470-510 MHz
   #define MODEL_C7            0xC7 // Heltec Mesh Node T114, 863-928 MHz
 
+  #define PRODUCT_TECHO       0x15 // LilyGO T-Echo devices
+  #define BOARD_TECHO         0x44
+  #define MODEL_16            0x16 // T-Echo 433 MHz
+  #define MODEL_17            0x17 // T-Echo 868/915 MHz
+
   #define PRODUCT_RAK4631     0x10
   #define BOARD_RAK4631       0x51
   #define MODEL_11            0x11 // RAK4631, 433 Mhz
@@ -631,6 +636,58 @@
       const int pin_led_tx = LED_GREEN;
       const int pin_tcxo_enable = -1;
 
+    #elif BOARD_MODEL == BOARD_TECHO
+      #define _PINNUM(port, pin) ((port) * 32 + (pin))
+      #define MODEM SX1262
+      #define HAS_EEPROM false
+      #define HAS_BLUETOOTH false
+      #define HAS_BLE true
+      #define HAS_CONSOLE false
+      #define HAS_PMU false
+      #define HAS_NP false
+      #define HAS_SD false
+      #define HAS_TCXO true
+      #define HAS_BUSY true
+      #define HAS_INPUT true
+      #define HAS_SLEEP true
+      #define BLE_MANUFACTURER "LilyGO"
+      #define BLE_MODEL "T-Echo"
+
+      #define HAS_INPUT true
+      #define EEPROM_SIZE 296
+      #define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
+
+      #define CONFIG_UART_BUFFER_SIZE 32768
+      #define CONFIG_QUEUE_SIZE 6144
+      #define CONFIG_QUEUE_MAX_LENGTH 200
+
+      #define HAS_DISPLAY true
+      #define HAS_BACKLIGHT true
+      #define DISPLAY_SCALE 1
+      #define PIN_VEXT_EN _PINNUM(0, 12)
+      const int pin_disp_cs = 30;
+      const int pin_disp_dc = 28;
+      const int pin_disp_reset = 2;
+      const int pin_disp_busy = 3;
+      const int pin_disp_en = -1;
+      const int pin_disp_sck = 31;
+      const int pin_disp_mosi = 29;
+      const int pin_disp_miso = -1;
+      const int pin_backlight = 43;
+
+      const int pin_btn_usr1 = 42;
+
+      const int pin_reset = 25;
+      const int pin_cs = 24;
+      const int pin_sclk = 19;
+      const int pin_mosi = 22;
+      const int pin_miso = 23;
+      const int pin_busy = 17;
+      const int pin_dio = 20;
+      const int pin_tcxo_enable = 21;
+      const int pin_led_rx = 14;
+      const int pin_led_tx = 14;
+
     #elif BOARD_MODEL == BOARD_HELTEC_T114
       #define MODEM SX1262
       #define HAS_EEPROM false
@@ -652,13 +709,10 @@
       #define EEPROM_SIZE 296
       #define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
       #define BLE_MANUFACTURER "Heltec"
-      #define BLE_MODEL "HT-n5262"
+      #define BLE_MODEL "T114"
 
-      // ADC
       #define PIN_T114_ADC_EN 6
-
-      // External sensors
-      #define PIN_T114_VEXT_EN 21
+      #define PIN_VEXT_EN 21
 
       // LED
       #define LED_T114_GREEN 3