A developer has built an offline messaging device that retrieves Telegram content without internet connectivity, using Meshtastic radio modules and a Raspberry Pi as the backbone infrastructure. The system consists of two radio-equipped devices operating on mesh networking technology—one stationary unit at home connected to the Raspberry Pi, and a portable handset the user carries.
The setup functions by transmitting text requests from the portable device via radio frequency to the home node, which then queries Telegram channels, retrieves posts, and transmits the content back wirelessly. The interface strips video and images to conserve bandwidth, displaying only text in transliterated format to maximize readability on the small screen. The system caches posts for offline browsing and also receives direct messages, effectively converting Telegram into a functional paging service independent of cellular or broadband networks.
The primary limitation remains battery depletion during extended use, a common constraint for portable radio devices. The project highlights growing interest in decentralized or offline-first communication alternatives, particularly relevant given increasing scrutiny of centralized messaging platforms by regulators worldwide.