Detect OLED or the original stock TFT touch assembly in ordinary V4.2/V4.3
images. Add saved live display.type auto/oled/tft/off selection and report
the active selection in board output. Keep sensors on primary I2C, preserve
shared power, and isolate TFT FSPI from radio HSPI through sleep and changes.
Consolidate future picker/build choices only with application capability
proof. Retain exact legacy OTA identities and separate R8 hardware images.
Document controls and physical qualification limits.
Validation: five serialized Full builds with capability/size/RAM checks;
focused host tests, existing R8/T-Deck/OLED regressions, build-profile suite,
and picker/provider tests. V4.3 OLED live changes and off/auto reboot
persistence passed on Mercerwood. Physical TFT qualification remains pending.
Allow Auto, SSD1306 or SH1106 through display.controller on display-enabled RAK4631 and RAK3401 roles. Persist the choice before restart without changing the active screen policy, and let saved Auto override legacy build defaults.
Share checked settings I/O and the existing atomic writer to keep Full Companion within its flash boundary while retaining features and existing record formats. Cover save failures, backup recovery, startup selection and ambiguous OLED replies.
Validation: 35 targeted host tests passed. RAK4631 Full Companion and RAK3401 unified LoRa OTA repeater build and package checks passed with release-length version strings.
mikecarper