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internet

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All The News That's Fit To Print On Ken's Blogspot Serving The Internet Since 2006

4/22/2026

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BTC Mesh: Sovereign Communication and Off Grid Bitcoin Transactions

Ever imagined sending a Bitcoin transaction without an internet connection? Or talking to your friends during a total blackout when the cell network just vanishes? It sounds like science fiction, but this technology is an accessible reality, built with low-cost hardware and open-source software. Welcome to the world of mesh networks, Meshtastic, and the **BTC Mesh** project. This guide explores the universe of decentralized communication networks, showing how they work, why they are vital for our digital sovereignty, and how you can use them to strengthen your privacy and resilience—not just in communication, but in your Bitcoin transactions as well. https://fountain.fm/episode/nr8qWgi7XNoBbDkc8GZj https://open.spotify.com/episode/6vKW7Lhi3uOUhlRogAtgej ## What Are Mesh Networks and Why Should You Care? Our connected world runs on a fragile, centralized infrastructure. Cell towers, internet providers, data centers—if one of these points fails, communication stops. A mesh network turns this logic on its head. Here, each participant (or "node") connects directly to other nodes within its reach, forming a web of P2P (peer-to-peer) connections. Instead of data passing through a central server, it hops from node to node until it reaches its destination. The true strength of this approach is **decentralization and resilience**. If a node goes down, the others simply find a new path for the information. The network reconfigures and heals itself. ![LoRa Topology](https://meshtastic.org/assets/images/lora-topology-2-c80684f1eafdf2a71fbaf26e494fb26d.webp)Source: [meshtastic.org](meshtastic.org) ## LoRa and Meshtastic: The Dynamic Duo To create these networks in the real world, the enthusiast community has rallied around a powerful duo: - **LoRa (Long Range):** Think of LoRa as the physical layer—the "radio waves" of our network. It's a technology that allows for long-range wireless communication with incredibly low power consumption. We're talking about cheap little radios that can send small data packets for miles, running for days on a single battery. - **Meshtastic:** If LoRa is the physical medium, Meshtastic is the brain. It's open-source software that equips these radios to form a smart, easy-to-use mesh network. Meshtastic handles everything: discovering other nodes, managing routes, encrypting messages, and providing an interface on your phone, connected via Bluetooth. Meshtastic was originally created as an off-grid communicator, but its usefulness goes far beyond that. Here, privacy is a fundamental pillar. To join a group channel, you need the encryption key. Direct messages are end-to-end encrypted. It's like having a "hardware wallet" for your communication: your private key is secure on your radio, ensuring that only you and the recipient can read the messages. While Meshtastic is the most popular, alternatives like MeshCore exist, which aim to optimize packet routing. However, the network effect is powerful, and the vast majority of users today are on the Meshtastic platform. ## Introducing BTC Mesh: Bitcoin Transactions Via Radio This is where Bitcoin enters the picture. The inspiration for the BTC Mesh project came from a mix of necessity and chance. After buying a LoRa radio on AliExpress that, to my frustration, couldn't transmit over long distances—and the seller simply stopped responding—I discovered it worked perfectly within my apartment. With two radios in hand, one for the base and another "defective" one, I had the perfect test environment for a new use case: sending Bitcoin transactions over the mesh network. [GitHub - eddieoz/btcmesh: BTC Mesh Relay is designed to send Bitcoin payments via LoRa Meshtastic.](https://github.com/eddieoz/btcmesh) BTC Mesh is a simple application that allows anyone on a Meshtastic network to send a Bitcoin transaction (on-chain, layer 1) over the radio network, without needing a direct internet connection. ### How the Magic Works The system has two parts: a **client** and a **server**. - **The Server:** Someone on the network with internet access runs the "server node." This is a computer (a Raspberry Pi can handle it) connected to a LoRa radio and a full Bitcoin node (Bitcoin Core). It acts as the bridge between the off-grid mesh world and the global Bitcoin network. - **The Client:** Anyone else on the network, even miles away and without internet, can use the "client" on their laptop or phone. The process is a choreographed dance designed for the low-speed LoRa network: 1. **Preparing the Transaction:** In a wallet like Sparrow, you create and sign your transaction. Instead of clicking "Broadcast," you copy the "Raw Transaction"—a long hexadecimal text. 2. **Sending Over the Mesh:** In the terminal, you run a simple command, pointing to the server's radio and pasting your raw transaction. 3. **The Communication:** Since the transaction is too large for a single LoRa packet, the client splits it into chunks and starts a conversation with the server: - **Client:** "Hey server! I have a transaction in 15 parts. Can we start?" - **Server:** "Roger that! Awaiting 15 parts. Send the first one." - **Client:** (sends part 1) - **Server:** "Part 1 received. Send part 2." - This "handshake" continues until all parts are confirmed, ensuring the transaction arrives complete. 4. **Validation and Broadcast:** Upon receiving everything, the server reconstructs the transaction, validates it, and hands it off to its local Bitcoin node, which finally broadcasts it to the worldwide network. And that's it! Your transaction is sent to the blockchain, broadcast from a radio, without your IP address ever being exposed. ## Maximum Privacy and Sovereignty BTC Mesh's power lies in its layers of privacy: - **No IP Trail:** Since the transaction is sent via radio, there is no record of your IP address. To the Bitcoin network, the transaction simply originated from the server node. - **End-to-End Encryption:** The communication between the radios is encrypted by Meshtastic. No one in between can see the content of your transaction. - **Extra Layer with Tor:** For maximum privacy, the server node can connect to the internet through the Tor network. This way, not even the server's IP is exposed in the final broadcast. This combination creates a powerful system for censorship-resistant Bitcoin transactions with high privacy. ## Building Your Kit: The Hardware Excited to build your own station? The hardware is cheap and accessible. - **Frequency is Key:** First, know the legal LoRa frequency in your country. In Brazil, use 915 MHz. In Europe, 868 MHz. Buying the wrong frequency will render your radio useless. - **Popular Brands:** - **Heltec:** Very popular, with boards like the T114, V3, and the Wireless Bridge, which comes with a practical design and an e-ink screen. - **RAK Wireless:** Considered more "professional." The RAK4631 model (which I use for my base) is excellent, and the WisBlock line is modular, requiring no soldering. - **LilyGo:** Famous in the "maker" community. Offers boards like the T-Beam (with GPS), T-Echo (small and practical), and the T-Deck (a full communicator with a keyboard). - **Seeed Studio (SenseCAP):** Offers robust devices like the T1000-e (waterproof) and the XIAO ESP32S3 (tiny, perfect for compact projects). - **Antennas:** Don't underestimate the antenna! And a crucial warning: **never, ever, turn on your radio without an antenna connected**, or you could burn out the transmitter. - **3 dBi:** A more "rounded" signal (a sphere), great for short distances with vertical obstacles. - **10 dBi:** A "flatter," more directional signal (a frisbee), for long distances with a clear line of sight. - **Power:** Many boards have connectors for batteries and small solar panels, allowing you to create autonomous nodes. ## Limitations and Considerations Despite its power, LoRa technology has its limits: - **Low Bandwidth:** The network is slow. Think 140-character Twitter. It's perfect for messages, but forget about web browsing. - **Regulation:** Many regions limit the amount of data a radio can transmit per hour ("duty cycle"). Meshtastic respects these limits, which reinforces the need for optimized applications. - **Need for a Bridge:** For a transaction to reach the global network, one node on the mesh needs internet. The network can be fully off-grid for internal communication, but the bridge to the outside world is necessary for certain applications. **MQTT servers** can play this role, connecting distant mesh networks over the internet. ## Use Cases: Beyond Bitcoin - **Disaster Communication:** Projects like [Disaster.Radio](Disaster.Radio) focus on using LoRa to coordinate rescue teams during catastrophes. - **Outdoor Activities:** Essential for hiking and camping in remote locations. - **Internet of Things (IoT):** In agriculture, sensors can cover vast areas. On farms, they can monitor livestock. - **Private Communication:** In a world of surveillance, having a communication channel that you control is an act of sovereignty. ## The Future is Decentralized Projects like BTC Mesh offer a glimpse into a more resilient, private, and decentralized future. They give us the tools to build our own communication and financial networks, free from centralized control. The technology is cheap, the software is free, and the community is vibrant. Building your first node might seem intimidating, but it's a rewarding project and a practical step toward personal sovereignty. So, are you ready to get off the grid?

Sojourns in the digital future

*Turning and turning in the widening gyre; The falcon cannot hear the falconer; Things fall apart; the centre cannot hold; Mere anarchy is loosed upon the world; The blood-dimmed tide is loosed, and everywhere the ceremony of innocence is drowned; The best lack all conviction, while the worst are full of passionate intensity.* - W.B. Yeats, The Second Birth *A man who calls his kinsmen to a feast does not do so to save them from starving. They all have food in their own homes. When we gather together in the moonlit village ground it is not because of the moon. Every man can see it in his own compound. We come together because it is good for kinsmen to do so.* - Chinua Achebe, Things Fall Apart The year is 1990. For the past four years, you have been gradually familiarizing yourself with the infrastructure and tools that make up a still nascent global technology which is being referred to as the Internet. You and some of the peers in your network are now using a personal computer for word processing and a few other functions. However, you are the only one in your peer network accessing this Internet. For you, it all started four years ago. A seed was planted when you listened to a radio interview with an engineer who had worked on something called #ARPANET, a precursor to this new Internet, developed by the U.S. Department of Defense. The engineer described how this emerging Internet would eventually become the public version of ARPANET. The interview piqued your interest and you began sifting through available information to learn more. Four years later, you are now part of a local Internet users group which meets once per week to discuss your respective experiences and prognostications. You are collectively referred to by friends in your non-Internet peer network as that “talking computers group”. Over time, this group has come to occupy an increasingly important role in your life. You now awkwardly straddle two peer groups, continually searching for ways to find overlap and to integrate these two dimensions of your social life. It isn’t easy, and you leap back and forth between hope and despair. You have begun to see more clearly into a future, just over the horizon, where life will be irretrievably transformed by this Internet. You see both opportunities and threats, and you have come to believe that we all need to become invested in this discussion in order to guard against threats and to achieve the greatest good for society. You make the case with your non-Internet peer network, but it is difficult to gain traction. They get the excitement regarding personal computers, but computers talking to each other? Digital communication replacing the postman, the video store, the newspaper, making its way into the workplace and other such predictions? It all seems a bit far fetched. They grow weary of your persistent “wait until you see how the Internet is going to change this” interventions. Eventually, you elect to just keep mostly quiet on this topic when with them. Your local Internet users peer group provides you with much needed community. Still, you lament that you live in a sort of limbo. You imagine what the Internet portends for daily life five, ten, or forty years into the future and how radically transformative it is going to be. However, there is little nourishment from that today. You’re in a period of prolonged waiting. You long for tomorrow, today. You long to be in the imagined world of the ubiquitous Internet, where networked technology and communications will be placed in service of the greater good and an acceleration toward the marvels of human potential. This longing and the awkwardness of straddling divergent peer groups persists for what feels like an eternity. Then, as if out of nowhere, a buzz circulates through your “talking computers group” and other similar groups. It turns out that there are some forward-thinking communities around the world, possibly three or four, that have begun to pull forward the future into the present. They have connected the majority of people in their local community to the Internet and it has begun to permeate many dimensions of daily life throughout their region. You decide that you need to see it for yourself. You book a Pan Am flight and hit the friendly skies to visit one of these communities. After being greeted at the airport by a contact with whom you had corresponded via a clunky chat room, you make the short drive back to the community. En route, you marvel at the small portable phone your contact has nestled beside him, a Motorola. It’s the new “flip phone” you’ve heard about. He tells you that a few homes and businesses in the community just got them, but most are still using older Siemens or Nokia portable phones. “Older?,” you think to yourself, and "wait, these people are all using cellular phones?” The next week spent in the community is filled with more discoveries and revelations... The local postal service has been significantly reduced over the past year. Locals instead resort to electronic mail for most of their routine communications. They're calling it e-mail. Agonizing waits for services and long lines for day-to-day activities have been reduced. Forms and information exchange have mostly gone “online”. There are several major businesses in town which are now processing orders for goods entirely online, with delivery right to your doorstep. More are planning to follow suit. There’s even rumour that within the next couple of years you will be able to pay online for goods purchased online; no need to pay the delivery person at the door by cash or cheque. After a week of living in the digital future, you return home to your life, to your two local peer networks, and your state of limbo. The difference now, is that you have experienced a taste of the future. It is no longer simply imagined. You know it is possible, and what it feels and sounds like. You share tales of the future with both of your peer groups. Your Internet users peer group activates. Many plan to also book that Pan Am flight, so they can see and feel it for themselves. Your other peer group finds it somewhat fascinating, but they mostly nestle back into their daily, analog lives. Fast forward. The year is 2023. For the past four years you have gradually been learning about the global #Bitcoin network and software. You exchange portions of your local “fiat” currency for the commodity money which goes by the same name, Bitcoin or BTC. You are sampling a new digital future. It feels like dĂ©jĂ  vu (all over again). In 2023, you again find yourself part of two divergent peer networks. You again make a pilgrimage to visit communities that are pulling forward the future into the present, using Bitcoin. You again feel as though you are living in a state of limbo back at home, enduring a period of prolonged waiting. In 2023, however, it feels as though your appeal to peers, hoping they will take an interest in your newfound passion, has a different quality to it. The stakes feel much higher, the consequences more grave. It’s hard to put your finger on it, but somehow it feels as though this is a game for all the marbles. You and other so-called Bitcoiners around the world have amassed enough intelligence on a range of interconnected topics revolving around Bitcoin to sense that a battle is being waged. You envision a future where many more facets of life will be mediated digitally, much through artificial intelligence. It doesn’t take much to convince your non Bitcoiner peers of this. However, it's a challenge to keep their attention for a discussion of what's at stake and why Bitcoin matters, both for and in this future. You have shared with your non Bitcoiner peers how money, something that permeates nearly every facet of our lives, is not actually what we thought it was. More aptly put, we have ceased to think at all about what money is, other than the extent to which we possess or lack it. You have made the case that this collective amnesia has very serious consequences. You have invited your peers to consider the history of money and the story of how, over time, humans have chosen to store and exchange value. Your hope is that, like you, they will come to appreciate the harmful impact of our most recent monetary experiment: fiat money. You have shared resources about the insidious nature of inflation, enabled by fiat currencies, and its many downstream social effects. You have highlighted the imperatives of perpetual growth and conspicuous consumption that are required by our global financial systems, propelled by consistently manipulated fiat money. You have described the mechanics of global debt, resource extraction, neocolonialism and how small portions of the world remain relatively affluent at the expense of others which are correspondingly impoverished. You have attempted to connect the dots, tracing the line of fiat money which runs between them. Sadly, this is a dish for which you struggle to find ready bellies; a pregnant discussion for which you struggle to find ready minds. You want your non Bitcoiner peers to see that it is our broken money and the toxic incentives which it aids and abets on a global scale that are at the heart of so much strife, division and inequity in the world. You want them to grasp that it is our diseased fiat money lifeblood which preys upon humanity’s organs. You want them to consider what happens if we carry forward this fiat monetary system fully into the digital realm. You want them to see that this will very likely be a world of Central Bank Digital Currencies (CBDCs) and social credit scores, mass surveillance, censorship, behaviour-control, and state-sanctioned violence; a world whose dystopian cocktail carries a potentially fatal hangover. You want them to grasp that, right now, today, one of the single best strategies we have to prevent such a dystopia is to replace our fiat currencies through mass adoption of Bitcoin. As you did in 1990, however, you mostly keep quiet with your non Bitcoiner peers. You carefully select your moments and your opportunities to plant seeds. You water. You hope that one day soon a garden will blossom. You know that there are milestones on this learning journey, aha moments, and it takes time. You know that there is profound depth and nuance to these matters, and that the learning journey requires not only an intellectual curiosity but a willingness to interrogate conventional wisdom. This is all the more challenging amidst the incessant noise of attention-grabbing media, politically-motivated narratives, and tribalized civic spaces. You learn patience. You find community among other Bitcoiners and you build as a community, globally. You embrace self-deprecating humour, knowing that to many who are close to you and have not embraced this learning journey you appear unhinged at times. Nevertheless, friendships are occasionally strained. Such is the life of one who possesses knowledge while uncomfortably straddling epochs. Yes, things fall apart. Still, maybe, hopefully, through sheer persistence and by the grace of those greater daemons which elevate our humanity, we shall eventually hold the centre.