Screwless heltec v4 case (soldered pin headers, optional GNSS)

Case for Heltec V4

Compact, screwless enclosure for the Heltec V4 LoRa board. The lid is held in place by press-fit (friction), no screws, no threaded inserts, no additional hardware required.

Compatibility

• Heltec WiFi LoRa 32 V4 (not V2/V30 which have different PCB layout)

• 2.54 mm pin headers, soldered

• SMA connector with any standard SMA antenna (stub, whip, rubber duck, omni, directional, etc.). The case has a round cutout that fits the SMA jack itself, so antenna choice is entirely up to you.

• Optional GNSS module compartment: the case includes a dedicated bay sized for the L76K GNSS module. Any module that physically fits will work; it does not have to be the exact L76K.

• LiPo battery with Micro-JST 1.25 connector, in one of the following sizes:

  • 65 × 35 × 10 mm (typical 3000 mAh li-po) 

  • 50 × 33 × 10 mm (typical 2000 mAh li-po)

Printed parts

• Front: with cutouts for display, SMA antenna, USB-C, and integrated buttons

• Pin spacer: rests on the board's pin headers and supports the battery

• Back: two variants, one per battery size (65 × 35 × 10 mm or 50 × 33 × 10 mm)

Print settings

• Material: any 

• Layer height: 0.15-0.25 mm

• Infill: 15%

• Wall loops: 3

• Top/bottom shell layers: 3 each

• Supports: not required. The cutouts for the SMA antenna and USB-C have overhangs, but they can be printed as bridges on my printer (Voron trident). On printers with poor bridging performance, enable supports for these areas only.

Assembly (top to bottom in the assembled state)

1. Insert the Heltec board into the top shell - display, antenna connector, USB-C, and buttons align with the cutouts. Battery and GNSS should already be connected. First align the USB port, then press the screen into place. Ensure that it sits flush with the front face of the case. The antenna connector on the board needs to be rotated as shown in the image.

2. Place the pin spacer onto the board's pin headers as shown in the picture.

3. Place the LiPo battery on the pin spacer. The battery should not sit on its wires. Move them to the side.

4. Press the matching lid (depending on battery size) on top. Make sure to not pinch or pull on any wires while doing so.

Update: 
It seems like I accidentally mirrored the 3000mAh backplate. You can easily fix it with the mirror function of your slicer. ..  Or just use this already fixed backplate from another printables user. :)