Modular Meshtastic radio case (RAK, Seeed, Heltec, etc.)

I started building Mesh in my neighbourhood and tried out several radios. I wanted to have a printable case that could be used with multiple radios (Seeed, Heltec, RAK) in multiple configurations (with POE, USB-C, external sensors/connections, etc.). I created a case with printable inlet for different radio screw layouts and modular attachment plate to allow screws, zip-ties, U-bolts, etc.

This is still in development so you can expect updates.

For outdoor use I have vent plug on the case. For POE versions I have hole that allows weatherproof RJ45 passthrough. USB-C is on most models. I have location / hole for generic 9 connections with weatherproof passthrough that can be used for external sensors, panels or power. Antenna hole obviously.

The battery top has layout for 18650 cases to be mounted (with heat set inserts of course) and secured with zip ties. If you use cases with more than 1 cell make sure they are in parallel.

Short instructions (I will add proper BOM and instructions later):

• Print the case bottom (with PLA for indoors, PETG/ASA/ABS for outdoor use)

• Print the case top (with PLA for indoors, PETG/ASA/ABS for outdoor use)

• Print the inlet based on your radio (the layout varies, screwholes, position of radio, etc.)

• Print the gaskets. 1x case 4x corner (Varioshore TPU, other may work as well and normal o-rings can be used for corners)

• (Optional) Print the mounting plate. I only have the screw variant uploaded now, but will upload others later when tested and perfected.

• Insert M3 heat set inserts on Case Top corners to allow tightening it on the Case Bottom.

• Other heat set inserts can be optional and you can take shortcuts, but the inlet is designed for short M2 heat set inserts, case bottom for short M3. Case top includes optional heat set insert locations to allow future upgrades such as protection circuit, MPPT or other accessories.

9/3 update: added solar variant models + pictures. I use HY115x115 solar panel from Aliexpress. First seal with silicone  around the connectors (back side of solar panel), then make another round very close to edge (5-10mm) not too much silicone. Then lower the case on top of panel, use the connector hole as your guide (see picture). After silicone has dried a bit, seal the panel from outside with epoxy (see picture). Use CN3791 or similar to charge and protect the batteries.

9/8 update: added mounting plates for vertical and horizontal rail/pipe/mast with u-bolt holes (55mm)

9/8 update: added mounting plate for zipties

10/18 update: added inlet for Seeed radios (+ picture)

11/4 update: added seeed inlet for solar case

4/30/2026 update: shared stp with all models, happy remixing

IN PROGRESS, UPDATES COMING LATER

Connectors that fit:

Vent plug (option 1): https://www.aliexpress.com/item/1005005747707166.html M16x1.5

Vent plug (option 2): https://www.aliexpress.com/item/1005008646432689.html M16x1.5

Aviation plug (general connections): https://www.aliexpress.com/item/1005006373847112.html SP13

Ethernet: https://www.aliexpress.com/item/1005008083912199.html I tested YPM20-CAT6-C02YPM20-CAT6-C02

USB-C passthrough: https://www.aliexpress.com/item/1005005507562292.html there are hundreds of these that fit. Others might be better, soft gasket parts are not very good with this seller.

Battery holders. There are hundreds of these as well. The spacing should be 20mm.

https://www.aliexpress.com/item/1005004726098537.html 2 in parallel

https://www.aliexpress.com/item/1005006283625827.html singles

https://www.aliexpress.com/item/1005005004576756.html 4 slot

Solar panel:

https://www.aliexpress.com/item/1005008792044338.html 9V 2W 115x115

Solar charger:

https://www.aliexpress.com/item/1005008401675841.html Select version (voltage) based on the panel you use

The base model of the case printed in ASA and gaskets printed with Varioshore TPU has been tested to be waterproof to a limit. The case was submerged over night and inside was dry. Note: this was without connectors, just to test the case design and gaskets. Connectors will need to be properly installed with o-rings to be as watertight.