Add CardKB support for ProMicro via shared I2C bus

variants/promicro/platformio.ini

@@ -176,4 +176,43 @@ lib_deps =
 [env:ProMicro_kiss_modem]
 extends = Promicro
 build_src_filter = ${Promicro.build_src_filter}
-  +<../examples/kiss_modem/>
+  +<../examples/kiss_modem/>
+; ============================================================
+; Solo build (UI completa on-device) com CardKB no barramento
+; I2C ja usado pelo OLED (SDA=D8, SCL=D7 -- confirmado contra o
+; esquematico oficial da fakeTec V5 rev.B). Requer o patch
+; CARDKB_USE_PRIMARY_WIRE em UITask.h/.cpp e SettingsScreen.h.
+; ============================================================
+[env:ProMicro_companion_solo_dual]
+extends = Promicro
+board_build.ldscript = boards/nrf52840_s140_v6_extrafs.ld
+board_upload.maximum_size = 712704
+; -Ofast (default do core) infla o flash num build solo feature-completo;
+; -Os cabe com folga.
+build_unflags = -Ofast
+build_flags = ${Promicro.build_flags}
+  -I examples/companion_radio/ui-new
+  -D MAX_CONTACTS=350
+  -D MAX_GROUP_CHANNELS=40
+  -D BLE_PIN_CODE=123456
+  -D DUAL_SERIAL=1
+  -D OFFLINE_QUEUE_SIZE=256
+  -D DISPLAY_CLASS=SSD1306Display
+  -D FIRMWARE_SOLO_BUILD=1
+  -D UI_SENSORS_PAGE=1
+  -D ENABLE_SCREENSHOT
+  -Os
+  ; CardKB compartilhando o barramento do OLED/RTC (D8/D7) --
+  ; NAO definir ENV_PIN_SDA/SCL aqui, colidiria com o LoRa (D13/D14).
+  -D CARDKB_USE_PRIMARY_WIRE=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${Promicro.build_src_filter}
+  +<helpers/ui/SSD1306Display.cpp>
+  +<helpers/ui/MomentaryButton.cpp>
+  +<helpers/nrf52/SerialBLEInterface.cpp>
+  +<../examples/companion_radio/*.cpp>
+  +<../examples/companion_radio/ui-new/*.cpp>
+lib_deps = ${Promicro.lib_deps}
+  adafruit/RTClib @ ^2.1.3
+  densaugeo/base64 @ ~1.4.0