Imagine a wireless communication device that lasts five years on nothing but a PVC pipe and a stack of D-cell batteries. Sounds too good to be true, right? But that's exactly what [Bertrand Selva] achieved with his ingenious LoRaTube project.
LoRa technology has revolutionized long-range, low-power wireless communication, and its popularity is evident in the countless projects built around it. But here's where it gets controversial: while many LoRa setups rely on solar panels, rechargeable batteries, and complex enclosures, [Bertrand] took a radically simpler approach. His LoRaTube is an autonomous repeater housed entirely within a length of PVC pipe. The antenna protrudes from the top, and inside lies all the essential hardware, powered by a stack of D-sized alkaline cells connected to a supercapacitor-buffered power supply of his own design. This setup is not only weatherproof and budget-friendly but also remarkably durable, with an estimated five-year lifespan thanks to its ultra-low standby current.
And this is the part most people miss: While you can build a basic LoRa repeater in about an hour, off-grid deployment often introduces costly complexities. Solar panels, charge controllers, and rechargeable power supplies add both expense and potential points of failure. [Bertrand]'s solution? Embrace simplicity and ruggedness. Eighteen D-cell batteries stacked in a PVC tube offer affordability and reliability, especially when they power the device for years without needing replacement.
In the video below (in French), [Bertrand] demonstrates raising a LoRaTube repeater and conducting a range test. The project's source code and CAD files are available on the project page, though the adorable outdoor helper cat is, unfortunately, not included. But here’s the question: In a world chasing cutting-edge solutions, is there still a place for such elegantly simple designs? Let us know your thoughts in the comments!
