Initial support for nano g2 ultra

not yet implemented are GPS and external notification LED and buzzer

variants/nano_g2_ultra/platformio.ini

@@ -0,0 +1,57 @@
+[nrf52840_g2_ultra]
+extends = nrf52_base
+platform_packages = framework-arduinoadafruitnrf52
+build_flags = ${nrf52_base.build_flags}
+  -I src/helpers/nrf52
+  -I lib/nrf52/s140_nrf52_6.1.1_API/include
+  -I lib/nrf52/s140_nrf52_6.1.1_API/include/nrf52
+lib_deps =
+  ${nrf52_base.lib_deps}
+  rweather/Crypto @ ^0.4.0
+  lewisxhe/PCF8563_Library@^1.0.1
+
+[Nano_G2_Ultra]
+extends = nrf52840_g2_ultra
+board = nano-g2-ultra
+board_build.ldscript = boards/nrf52840_s140_v6.ld
+build_flags = ${nrf52840_g2_ultra.build_flags}
+  -I variants/nano_g2_ultra
+  -D NANO_G2_ULTRA
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+  -D SX126X_CURRENT_LIMIT=140
+  -D SX126X_RX_BOOSTED_GAIN=1
+  -D PIN_USER_BTN=38
+build_src_filter = ${nrf52840_g2_ultra.build_src_filter}
+  +<helpers/*.cpp>
+  +<../variants/nano_g2_ultra>
+debug_tool = jlink
+upload_protocol = nrfutil
+
+[env:Nano_G2_Ultra_companion_radio_ble]
+extends = Nano_G2_Ultra
+build_flags =
+  ${Nano_G2_Ultra.build_flags}
+  -I src/helpers/ui
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+  -D BLE_PIN_CODE=0
+  -D BLE_DEBUG_LOGGING=1
+  -D OFFLINE_QUEUE_SIZE=256
+  -D SH1106
+  -D DISPLAY_CLASS=SH1106Display
+;  -D ENABLE_PRIVATE_KEY_IMPORT=1
+;  -D ENABLE_PRIVATE_KEY_EXPORT=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${Nano_G2_Ultra.build_src_filter}
+  +<helpers/nrf52/SerialBLEInterface.cpp>
+  +<helpers/ui/SH1106Display.cpp>
+  +<../examples/companion_radio>
+lib_deps =
+  ${Nano_G2_Ultra.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+  adafruit/Adafruit SH110X @ ~2.1.13
+  adafruit/Adafruit GFX Library @ ^1.12.1
+