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docs: list ProMicro solo build, document CARDKB_I2C, update release notes

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- README's env table and external_keyboard.md's device-support table both
  get a ProMicro row -- missed when the PR #31 merge landed since neither
  was in scope for that commit.
- external_keyboard.md and build_flags.md now cover CARDKB_I2C alongside
  ENV_PIN_SDA/ENV_PIN_SCL: the PR generalised CardKB bus selection to a
  single macro after build_flags.md was first written, so the doc only had
  the older (still valid, but no longer the only) form.
- release-notes.md: added the ProMicro solo build and the new Build Flags
  reference page to v1.26's What's New.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-08-29 10:24:44 +02:00
co-authored by Claude Sonnet 5
parent f952bf237f
commit 433548dfee
4 changed files with 11 additions and 1 deletions
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docs/solo_features/build_flags.md
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@@ -48,7 +48,8 @@ existing `solo/<board>/platformio.ini` for what's already claimed).
| Flag | Adds |
| --- | --- |
| `ENV_PIN_SDA` / `ENV_PIN_SCL` | CardKB (M5Stack I2C keyboard, addr `0x5F`) on a second I2C bus. Probed at boot — harmless with nothing plugged in. See [External Keyboard & Joystick](./external_keyboard.md). |
| `ENV_PIN_SDA` / `ENV_PIN_SCL` | CardKB (M5Stack I2C keyboard, addr `0x5F`) on a second I2C bus (resolves to `Wire1`). Probed at boot — harmless with nothing plugged in. See [External Keyboard & Joystick](./external_keyboard.md). |
| `CARDKB_I2C=<Wire\|Wire1>` | Same CardKB support, naming the bus directly — for a board with no free pins for a second bus, set `CARDKB_I2C=Wire` to share the primary bus (already used by the display/RTC) instead of defining `ENV_PIN_SDA`/`ENV_PIN_SCL`. Takes precedence if both are somehow set. |
| `UI_HAS_JOYSTICK=1` + `UI_HAS_JOYSTICK_UPDOWN=1` (optional) + `JOYSTICK_UP` / `JOYSTICK_DOWN` / `JOYSTICK_LEFT` / `JOYSTICK_RIGHT` + `PIN_USER_BTN` + `PIN_BACK_BTN` | A wired joystick (four direction contacts + a press contact for Enter). Replaces single-button navigation entirely once enabled. See [External Keyboard & Joystick](./external_keyboard.md). |
| `PIN_GPIO1` .. `PIN_GPIO4` | Up to four general-purpose pins, each independently switchable between Off / Input / Output (GPIO1/GPIO2 also get an Analog step, if wired to an ADC-capable pin) from Tools › GPIO, and via the `!gpio1`..`!gpio4` bot commands. Not restricted to any particular board — works anywhere the pins are actually free. See [Tools Screen › GPIO](./tools_screen/tools_screen.md#gpio). |
| `PIN_HALL_SENSOR` + `HALL_ACTIVE_HIGH=1` (optional) | A Hall-effect or reed sensor for a magnetic flip cover: closing locks and blanks the screen instantly, opening unlocks and wakes it, no combo either way. `HALL_ACTIVE_HIGH` is only for a module wired to pull the pin high (rather than low) when the magnet is near. See [Screen Lock › Magnetic cover](./screen_lock/screen_lock.md#magnetic-cover-hall-sensor). |