Meshtastic RAK19003 + 2x18650 enclosure
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A portable node enclosure for RAK19003. Has room for the extra sensor under the board. Takes a 18650 holder for two
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This is my self designed enclosure for a small portable node using RAK19003. This version should take in all of the versions of RAK19003 but the LED locations are taken from version E (same as versions C and D).
Following images containing the RAK19003 board has the board model taken from RAKwireless website
Corners have 4.5mm holes (7mm deep) so they are great for M3 inserts that I used (4.2 x 5mm). The little quirks that I have made in the holes are because I used 0.6mm nozzle for this and I wanted some continuity for my walls. This didn't have any effect for the applying of the inserts. I used some normal M3 countersunk screws and to be honest, they were left a tad out from the lid. Under a millimeter or so, so nothing too serious.
Board mounting standoffs have 2.5mm holes (5mm deep) that were great for screwing the provided mounting screws in just as they were. The mounting holes on the RAK board are 2.7mm in diameter. I printed my case with PETG and your experience may vary on how smoothly you get to screw the screws in depending on the material. I've included .3mf and .f3d files if you want to do any adjustments.
As you may also observe, the case has some vent slots on the backside for any sensors that need some ventilation (like in my case, I installed RAK1901 temperature and humidity sensor).
The bay for the 18650 battery holder has space of 76.7 x 41.2 x 20.5mm. That was perfect for me to have a snug fit for my random AliExpress 1s2p 2x18650 battery holder.
For the Bluetooth antenna, I made a little space on the left side of the battery bay. In my case I had to remove the 3M adhesive tape from the RAK provided BT antenna to make it fit in there. I am aware that the BT antenna location isn't perfect since the batteries are right next to it but this was the easiest implementation I could think.
You may also observe the I carved the battery holder somewhat. That was for the BT antenna routing but after all it wasn't needed. But my battery holder's height was a bit too much and the lid was left bulging so I showed some knife to it and took some of the holder's plastic out (the top side where the contact bridge is visible on the right on the image above)