> ## Content Index > Fetch the complete content index at: https://k1wiz.net/llms.txt > Use this file to discover other available public pages before exploring further. # My Solar-Powered Backyard MeshCore Repeater - URL: https://k1wiz.net/my-solar-powered-backyard-meshcore-repeater/ - Published: 2026-10-15T15:58:49.000Z - Updated: 2026-10-15T15:58:49.000Z - Author: John *Off-grid communications, LoRa technology, and a little backyard experimentation.* One of the things I’ve always enjoyed about amateur radio and electronics is experimenting with different ways to communicate. Whether it’s HF, VHF/UHF, digital modes, or experimenting with new technologies, there’s always something interesting to explore. My latest backyard project is a **solar-powered MeshCore repeater**, operating around the clock under my amateur radio callsign, **K1WIZ**, and helping extend the growing MeshCore network throughout the Raleigh-Durham area of North Carolina. It’s a relatively simple installation, but it’s been a lot of fun experimenting with the technology, watching the network grow, and communicating with other MeshCore users throughout the region. **What Is MeshCore?** For those unfamiliar with MeshCore, it’s an off-grid, decentralized text messaging platform that uses **LoRa (Long Range) radio technology** to communicate over the 900 MHz ISM band. ![](https://k1wiz.net/content/images/2026/10/IMG_8805.png) Unlike traditional messaging applications, MeshCore doesn’t require cellular service, Wi-Fi, internet connectivity, or any centralized infrastructure to function. Instead, messages travel directly between radio devices or through a network of strategically placed repeaters that extend their reach. Users typically communicate through a smartphone application connected via Bluetooth to a small LoRa radio called a *companion node*. The companion node handles the actual radio transmission and reception, while the smartphone provides the messaging interface. ![](https://k1wiz.net/content/images/2026/10/IMG_8803.png) MeshCore supports both public and private communications: - **Public channels:** Unencrypted group conversations that other users on the network can receive and participate in. - **Private messaging:** Direct communications protected using AES-256 encryption. - **Repeater infrastructure:** Dedicated nodes that retransmit messages, extending the effective coverage area of the network. ![](https://k1wiz.net/content/images/2026/10/IMG_8804.png) Repeaters can forward both encrypted and unencrypted traffic without needing to decrypt the private message contents. What makes MeshCore particularly interesting is its efficiency. LoRa is designed to transmit relatively small amounts of data over considerable distances using very little power. While it certainly isn’t intended to replace conventional broadband communications, it’s remarkably well suited for short text messages, especially where power consumption and communications independence are important. **My Backyard Installation** My repeater is built around the **RAKwireless RAK4631 platform**, running a relatively recent release of the MeshCore repeater firmware. The hardware is installed inside a weather-resistant enclosure mounted on a pole in my backyard, with an external antenna extending above the enclosure. ![](https://k1wiz.net/content/images/2026/10/IMG_8799-1.jpeg) The repeater operates continuously, listening for nearby MeshCore transmissions and retransmitting eligible messages to help extend their reach across the network. Because the system is relatively low power, it’s an excellent candidate for solar operation. **Powered Entirely by the Sun** The repeater shares an existing solar power system that also operates my **WeatherFlow Tempest weather station**. The installation consists of: - A **50-watt solar panel**. - A **Victron Energy SmartSolar charge controller**. - A **12-volt lithium iron phosphate (LiFePO4) battery**. - DC power conversion hardware supplying the necessary operating voltages to the connected devices. ![](https://k1wiz.net/content/images/2026/10/IMG_8801.jpeg) The battery is housed in a separate enclosure beneath the solar panel, while the Victron controller manages charging and helps maintain the battery. The beauty of this arrangement is that neither the weather station nor the MeshCore repeater requires utility power to operate. During daylight hours, the solar panel replenishes the battery while supplying energy to the connected equipment. Overnight, the battery takes over. The objective is simple: **24 hours a day, 365 days a year, completely independent of the electrical grid**, provided solar production and battery reserves remain sufficient. The Victron SmartSolar controller also provides Bluetooth monitoring, allowing me to check panel voltage, charging current, battery voltage, and historical solar production from my smartphone. For example, one recent reading showed the panel producing approximately 15 watts, with the battery at 12.58 volts and the charge controller operating in bulk charging mode. ![](https://k1wiz.net/content/images/2026/10/IMG_8798.png) It’s nice having that visibility into the system without needing to open the battery enclosure or connect any test equipment. **Coverage Around Raleigh-Durham** My backyard isn’t necessarily an ideal repeater location, but it works surprisingly well. The antenna has relatively good visibility toward the **north and west**, while coverage toward the south and east is somewhat restricted by surrounding terrain, homes, and other obstructions. At approximately 900 MHz, antenna placement, elevation, and surrounding obstacles can make a significant difference in coverage. Even with these limitations, the repeater can communicate with other nodes across the wider Raleigh-Durham MeshCore network, extending my ability to exchange messages well beyond the immediate neighborhood. It’s particularly satisfying to see messages successfully traverse the network through multiple repeaters, knowing that none of those radio hops requires a cellular tower or internet connection. And as more people install companion nodes and repeaters, the network becomes increasingly useful. **Why I Find MeshCore Interesting** As an amateur radio operator, I’ve always appreciated the importance of communications systems that don’t depend entirely on commercial infrastructure. We often take our smartphones and internet connectivity for granted. Under normal circumstances, they’re extraordinarily convenient and reliable. But what happens when the power goes out, a cellular network becomes overloaded, or internet service becomes unavailable? That’s where technologies like MeshCore become interesting. A properly deployed network of battery-powered or solar-powered LoRa devices can continue exchanging text messages without relying on conventional telecommunications infrastructure. ![](https://k1wiz.net/content/images/2026/10/IMG_8806.png) Of course, MeshCore has limitations. It’s a low-bandwidth messaging system, not a replacement for voice communications, internet access, or conventional emergency communications networks. Its usefulness also depends on the availability and reachability of other nodes. Nevertheless, it provides another communications option, and I’ve always believed that having multiple independent ways to communicate is a good thing. **Redundancy matters.** Whether it’s amateur radio, GMRS, satellite communications, or something like MeshCore, having alternatives becomes particularly valuable when the systems we normally depend upon aren’t available. **A Growing Community** Beyond the technology itself, one of the most enjoyable parts of this project has been connecting with other MeshCore enthusiasts. It’s been interesting meeting people across the Raleigh-Durham area who are experimenting with their own companion devices, repeaters, antennas, and installations. There’s something familiar about it for those of us who’ve spent years in amateur radio. People experimenting with equipment, comparing coverage, improving antenna installations, and helping one another troubleshoot problems. Different technology, but very much the same spirit. My little backyard repeater, **K1WIZ**, is just one small part of that growing network. And because it’s solar-powered, it can continue doing its job even when the lights go out. **Final Thoughts** MeshCore is an interesting combination of modern digital communications, low-power radio technology, and the decentralized networking concepts that have fascinated radio experimenters for decades. The hardware is relatively inexpensive, the power requirements are modest, and the ability to build a communications network without depending on cellular or internet infrastructure makes it particularly appealing. For me, this project combines several interests: radio communications, electronics, solar power, and experimenting with technologies that can provide practical benefits. And perhaps the best part is that once it’s installed, it quietly sits in the backyard doing its job, day and night, helping other users exchange messages across the network. If you’re in the Raleigh-Durham area and experimenting with MeshCore, keep an eye out for **K1WIZ** on the network. You just might find yourself passing through my backyard! **73,** **K1WIZ**