Nắp lưng dành cho Bộ mở rộng Heltec v4

Back lid for Heltec v4 Expansion Kit

Due to the fact that the Heltec v4 Expansion Kit comes with an embarrassing back lid, I created the present model.

Recommended settings for the lid:
Sparse infill density: 45%
Sparse infill pattern: Gyroid

Support
Important !!! - This will create a protective net over the sensor grid and should not be removed. The appearance is pleasant and quite durable.

Type: Normal
Style: Snug
Support/object XY distance: 0
Support/object first layer gap: 0

For greater durability over time, you can set the following option from Support to 0: Top Z distances
I haven't tested it, I printed with 0.28

For the 4 holes where the lid is fixed you can use Add Support Blocker / Cylinder but it is not absolutely necessary, the support is removed quite easily by pushing from the opposite side.

For the hanging clamp, 2 x M2.5x3x3.5 insert nuts are used.

They are inserted from the side that comes inward with the thin tip first.

See the picture with them inserted.

If the screws extend beyond the nut, use the included spacer, resize its thickness in the slicer according to the size of the screw that extends beyond the nut. The attached spacer has a thickness of 0.65 mm.

Attached, also find a mini screwdriver for the screws that secure the expansion card to the case.

Designed in FreeCAD.

I will also add variants with GPIO access, I don't have a deadline for that.