Imagine a wireless repeater that lasts five years, powered by nothing more than a PVC pipe and a stack of D-cell batteries. Sounds too simple 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 communication, and its popularity is undeniable—just look at the countless projects built around it. [Bertrand]'s LoRaTube takes this a step further by creating a fully autonomous repeater, cleverly encased in a length of PVC pipe. At the top, you’ll find the antenna, while the interior houses all the essential hardware, including a custom supercap-buffered power supply fueled by those trusty D-cell alkaline batteries. The result? A weatherproof, budget-friendly, self-contained device that, thanks to its ultra-low standby current, is designed to last a solid five years.
But here's where it gets controversial: While you could build a LoRa repeater in about an hour using off-the-shelf components, the cost and complexity of off-grid deployment can quickly spiral out of control. Solar panels, charge controllers, and rechargeable batteries add not only expense but also potential points of failure. [Bertrand]'s approach? Keep it simple, cheap, and rugged. Eighteen D-cell batteries stacked in a PVC tube aren’t just affordable—they’re practically indestructible, especially when they deliver years of reliable operation.
And this is the part most people miss: The beauty of LoRaTube lies in its simplicity. By stripping away unnecessary complexities, [Bertrand] has created a solution that’s not only cost-effective but also remarkably durable. Whether you’re a seasoned maker or a beginner, this project is a testament to the power of thinking outside the box.
Watch [Bertrand] set up a LoRaTube repeater and conduct a range test in the video below (French audio). The source code and CAD files are available on the project page—just don’t expect the outdoor helper cat to come with it! But here’s a thought-provoking question for you: In an era of high-tech solutions, is there still a place for simplicity and ruggedness? Share your thoughts in the comments below!
