* refactored platformio.ini, breaking up into variants/*.ini files

variants/lilygo_tlora_v2_1/platformio.ini

@@ -0,0 +1,111 @@
+[LilyGo_TLora_V2_1_1_6]
+extends = esp32_base
+board = ttgo-lora32-v1  ; LILYGO T-LoRa V2.1-1.6 ESP32 with SX1276
+build_unflags = -Os
+build_type = release  ; Set build type to release
+board_build.partitions = min_spiffs.csv ; get around 4mb flash limit
+build_flags =
+  ${esp32_base.build_flags}
+  -Os -ffunction-sections -fdata-sections  ; Optimize for size
+  -D LILYGO_TLORA  ; LILYGO T-LoRa V2.1-1.6 ESP32 with SX1276
+  -D P_LORA_DIO_0=26    ; SX1276 DIO0 interrupt pin
+  -D P_LORA_DIO_1=33    ; SX1276 DIO1 interrupt pin
+  -D P_LORA_NSS=18      ; Chip select - SS pin
+  -D P_LORA_RESET=14    ; Reset pin
+  -D P_LORA_SCLK=5      ; SPI clock
+  -D P_LORA_MISO=19     ; SPI MISO
+  -D P_LORA_MOSI=27     ; SPI MOSI
+  -D P_LORA_TX_LED=2    ; LED pin for TX indication
+  -D PIN_VBAT_READ=35   ; Battery voltage reading (analog pin)
+  -D PIN_USER_BTN=0
+  -D RADIO_CLASS=CustomSX1276
+  -D ARDUINO_LOOP_STACK_SIZE=16384
+  -D DISPLAY_CLASS=SSD1306Display
+  -D WRAPPER_CLASS=CustomSX1276Wrapper
+  -D LORA_TX_POWER=20
+lib_deps =
+  ${esp32_base.lib_deps}
+  adafruit/Adafruit SSD1306 @ ^2.5.13
+
+; === LILYGO T-LoRa V2.1-1.6 with SX1276 environments ===
+[env:LilyGo_TLora_V2_1_1_6_Repeater]
+extends = LilyGo_TLora_V2_1_1_6
+build_src_filter = ${LilyGo_TLora_V2_1_1_6.build_src_filter}
+  +<helpers/ui/*.cpp>
+  +<../examples/simple_repeater>
+build_flags =
+  ${LilyGo_TLora_V2_1_1_6.build_flags}
+  -D ADVERT_NAME='"TLora-V2.1-1.6 Repeater"'
+  -D ADVERT_LAT=-37.0
+  -D ADVERT_LON=145.0
+  -D ADMIN_PASSWORD='"password"'
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+;  -D CORE_DEBUG_LEVEL=3
+
+[env:LilyGo_TLora_V2_1_1_6_terminal_chat]
+extends = LilyGo_TLora_V2_1_1_6
+build_flags =
+  ${LilyGo_TLora_V2_1_1_6.build_flags}
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${LilyGo_TLora_V2_1_1_6.build_src_filter}
+  +<helpers/ui/*.cpp>
+  +<../examples/simple_repeater>
+lib_deps =
+  ${LilyGo_TLora_V2_1_1_6.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_TLora_V2_1_1_6_companion_radio_usb]
+extends = LilyGo_TLora_V2_1_1_6
+build_flags =
+  ${LilyGo_TLora_V2_1_1_6.build_flags}
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+;  -D ENABLE_PRIVATE_KEY_IMPORT=1
+;  -D ENABLE_PRIVATE_KEY_EXPORT=1
+; NOTE: DO NOT ENABLE -->  -D MESH_PACKET_LOGGING=1
+; NOTE: DO NOT ENABLE -->  -D MESH_DEBUG=1
+build_src_filter = ${LilyGo_TLora_V2_1_1_6.build_src_filter}
+  +<helpers/ui/*.cpp>
+  +<../examples/companion_radio>
+lib_deps =
+  ${LilyGo_TLora_V2_1_1_6.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_TLora_V2_1_1_6_companion_radio_ble]
+extends = LilyGo_TLora_V2_1_1_6
+build_flags =
+  ${LilyGo_TLora_V2_1_1_6.build_flags}
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+  -D BLE_PIN_CODE=123456
+;  -D BLE_DEBUG_LOGGING=1
+;  -D ENABLE_PRIVATE_KEY_IMPORT=1
+;  -D ENABLE_PRIVATE_KEY_EXPORT=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${LilyGo_TLora_V2_1_1_6.build_src_filter}
+  +<helpers/esp32/*.cpp>
+  +<helpers/ui/*.cpp>
+  +<../examples/companion_radio>
+lib_deps =
+  ${LilyGo_TLora_V2_1_1_6.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_TLora_V2_1_1_6_room_server]
+extends = LilyGo_TLora_V2_1_1_6
+build_src_filter = ${LilyGo_TLora_V2_1_1_6.build_src_filter}
+  +<helpers/ui/*.cpp>
+  +<../examples/simple_room_server>
+build_flags =
+  ${LilyGo_TLora_V2_1_1_6.build_flags}
+  -D ADVERT_NAME='"TLora-V2.1-1.6 Room"'
+  -D ADVERT_LAT=-37.0
+  -D ADVERT_LON=145.0
+  -D ADMIN_PASSWORD='"password"'
+  -D ROOM_PASSWORD='"hello"'
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1