[plazmabokor]

Discussion #1098: @medmed58 reported that the BIGTREETECH Pi V1.2 board is a mirror image of the maker's model, and sent the official STEP.

What was wrong: the board was built by flipping the maker's drawing instead of turning it. With the USB and Ethernet at the right end, the USB-C, micro-HDMI and power terminal were at the front edge and the GPIO header at the back. In the maker's model it is the other way round: the USB-C, micro-HDMI and power terminal are at the back edge, the GPIO header at the front.

How I checked: I read the maker's STEP and compared the mounting holes and 13 parts one by one. The old model matched only as a reflection, the new one as a proper turn. The one off-grid hole is at (3.3, 17.65) in the STEP and at (67.35, 3.3) in the corrected board, at the front edge.

The fix: in bttPi12 every part's y is now 56 - y, and the four mounting holes are [3.3, 52.7], [61.54, 52.7], [3.3, 3.3], [67.35, 3.3]. Sizes, heights and all other boards are untouched; the microSD slot moves with the rest of the parts.

Tests: the new holes and the microSD slot's new place in tests/unit/sbcBoard.test.ts. On main 550d7fb (still the newest): npm test 533 files, 4642 tests pass (6 skipped); npm run test:e2e 119 files, 1050 tests pass; tsc --noEmit is clean; npm run export works.

🤖 Generated with Claude Code

https://claude.ai/code/session_018PZgw7hpWq3uABHCn8iZMo

[henmedia]

@plazmabokor Thank you, merged. Good catch with the maker's STEP, and thanks for letting medmed58 know in #1098. It goes out with the next release.

[henmedia]

@plazmabokor the corrected BIGTREETECH Pi is out in layerling 1.145.0. Thanks!