Chaski Net: Solar-Powered Mesh for Indigenous Knowledge Exchange

Chaski Net is a decentralized communication and storage platform designed specifically for the nomadic and semi-sedentary indigenous communities of the Peruvian Amazon. It consists of small, waterproof nodes powered by a 20W solar panel and a 12V LiFePO4 battery, each containing a Raspberry Pi Zero 2W and a LoRa radio module. These nodes form a resilient mesh network that can extend over 10 km line-of-sight, carrying text messages, voice notes, and small files. The software stack is tailored for oral cultures: a simple voice-based UI with Quechua and Shipibo-Conibo language support, and a p2p sync algorithm that prioritizes sharing of ceremonial calendars, medicinal plant uses, and hunting stories. The entire system is designed to be assembled locally from kits, with maintenance training provided to youth stewards. Chaski Net is not a replacement for the internet; it is a sovereign, low-bandwidth alternative that respects community protocols and knowledge ownership.

Indigenous communities in the Amazon face a double bind: modern communication infrastructure rarely reaches them, and when it does (e.g., satellite internet), it undermines traditional knowledge by funneling content through foreign platforms. Oral traditions, which are the backbone of their culture, are being lost as elders pass away without transmission. Existing tech solutions (WhatsApp, Facebook) are neither private, durable, nor respectful of oral modes of sharing. A bespoke, community-owned hardware network can bridge this gap while keeping data local and under community control.

• Deploy a 5-node mesh in a pilot village (e.g., Nuevo Belén) to enable daily voice messaging and file sharing
• Achieve >90% uptime on solar power alone, even during the rainy season
• Develop a Quechua/Shipibo voice interface that requires zero reading literacy
• Train 4 community members as "network stewards" to assemble and repair nodes
• Document a repeatable kit assembly guide for other communities
• Ensure that all stored knowledge remains within the community's physical territory

• No connection to the public internet (deliberately walled garden)
• No video streaming or high-bandwidth applications
• No centralized server or cloud dependency
• No proprietary software or subscription fees
• No surveillance or data mining

• Power: 20W monocrystalline solar panel, 12V 20Ah LiFePO4 battery, PWM charge controller, waterproof MC4 connectors
• Compute: Raspberry Pi Zero 2W (1GHz quad-core, 512MB RAM) running a minimized Debian
• Radio: Semtech SX1262 LoRa transceiver (433 MHz, 10 km range with directional antenna, 2 km with omnidirectional)
• Enclosure: IP67 polycarbonate case with desiccant pack, cable glands, and a simple wooden mount
• Sensor (optional): DHT22 for temperature/humidity monitoring (to warn of enclosure failure)
• Software: Meshtastic firmware (custom fork with voice notes and file sync), mbed TLS for encryption, SQLite for local storage

Each node is a store-and-forward router. When a user speaks a voice note via a USB microphone, the Pi records it, compresses it (Opus codec), and encrypts it with a community shared key. The note is then broadcast over LoRa to all nodes within range using a flooding protocol with duplicate suppression. Nodes store all received messages in a local database, indexed by author, date, and type (message, calendar entry, plant recipe). Every node periodically syncs with neighbors to ensure eventual consistency. The UI is a simple button-based menu: press to record, press to listen to new messages, press to scroll. The display is a 128x64 pixel OLED with large icons and text in the local script. The mesh can operate without any master node; each node is interchangeable. A special "ceremony" mode limits message flow during rituals to avoid disruption.

• Power failure: Overcast days or tree cover may deplete batteries. Mitigation: larger panel or battery, plus user training to reduce usage.
• Hardware failure: Humidity and insects may damage enclosures. Mitigation: coated electronics and scheduled maintenance.
• Community adoption: Elders may be skeptical of any technology. Mitigation: co-design with elders and gradual introduction via storytelling.
• Theft or misuse: Nodes could be stolen for scrap metal. Mitigation: tamper-evident mounts and local ownership (each node is painted with community symbols).
• Political interference: Authorities might view the mesh as a communication threat. Mitigation: maintain transparent logs and frame it as cultural preservation.

• What is the optimal trade-off between message size and battery life for voice notes?
• How can we ensure consent for storing sensitive knowledge (e.g., spiritual songs)?
• Should nodes support solar charging via USB-C as a backup?
• How do we handle multilingual messages when multiple scripts are used?
• Can we integrate a simple e-paper screen for lower power consumption?

The lead researcher moved to a different continent after funding for the pilot was cut, and the community focus shifted to a land rights emergency. The plans remain open-source and ready to revive when the time is right.

The name 'Chaski' comes from the Quechua word for messenger-runner. The project was designed in collaboration with the Amazon Indigenous Organization (OINA). All hardware schematics and code are published under a CERN OHL license. A key design principle: any part can be replaced with a local alternative (e.g., Peltier cooler instead of fan).