Epic B: PlatformIO / pioarduino migration #154

_{Recreated from Strycher/Field_Compass-archive#154 — originally opened by @Strycher on 2026-08-09. Credentials redacted where present.}

Parent feature: #151 · Plan: docs/plans/2026-08-09-platformio-hal-design.md

platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.13-1/platform-espressif32.zip

Not platformio/espressif32 — Espressif stopped maintaining PlatformIO support and the official platform tops out at Arduino core 2.x. FC is on 3.3.8. This matches the meshcore/Crosswire projects already under C:\Dev.

Children

B1 platformio.ini · B2 TFT_eSPI via build_flags · B3 pinned lib_deps · B4 src/include/lib layout · B5 build-time FW_VERSION · B6 parity check · B7 integration test (gates Epic C)

Done when

PIO artifact flashed and fully verified on hardware. arduino-cli is retired only after that passes — there is a path back until then.

Unblocks

#147 (WiFi credential provisioning needs build flags)