Independer

This repository is about a device called Independer. An Open-Source Project.

Encrypted messaging & data sharing via LoRaS & inexpensive hardware (ESP32). Independent from mobile network & WIFI. We use cheap ESP32s, LoRa antennas, 3D prototyping, mini keyboards and develop our own encrypted protocol together with software.

This page is intended for developers - please visit the official website for more information. If you want to join, or have an idea, feel free to write us or start a discussion. The current state of development can be viewed on the project board.

Presentation	Prototype-Video

esp32 - lora - encryption - short-message - protocol - keyboard - platformio - 3d-printing - independent

Maintainer: Maximilian Bundscherer

Overview

This repository describes the concept, the project structure, the encrypted LoraS transfer protocol (LoRaS) and the Independer application protocol. There are two type of devices: Actor (ID e.g. 0x01 or 0x02) with keyboard & accumulator and Gateway (ID e.g. 0g01 or 0g02) opt. with accumulator.

Features

• Actor to Actor (via LoRaS): Send messages directly between two Actors.
• Actor to Gateway (via LoRaS): Send messages via Gateway. Actors can query their messages from Gateways.
• Actor to Actor (via WIFI/Internet): Send messages via Internet. Actors can query their messages from WIFI/Internet.
• Who is near me? Scan the environment to find other Independers.
• Many other functions: Various test functions (Reachability Check, Reception & Transmission Evaluation), Update via WIFI, Notification LED, Deep Sleep Mode, Background-Sync, Battery Status, Send Quota & Gain, NTP-Time-Sync, Auto-Sync, Auto-Sleep, Contacts...

Specifications

• Built on inexpensive Hardware
• Open-Source Software & Protocol
• Open-Source 3D-printed Case
• Multiple ESP32 boards, languages and frequencies are supported
• OLED-Screen
• LoRa & WIFI
• External Antenna Connector
• Mini Keyboard (QWERTY)
• 3000mAh LiPo Battery
• USB Charging (Micro-USB)

Open-Source Project

Anyone can contribute to the project and build their own device. Many more features like GPS visualization, environment scanner, touch screen, alternative transmission and encryption functions are waiting in the future!

Documentation

• How-to, Hardware and Cost Overview
• Antenna Measurements
• Update over WIFI
• Developer Overview
• LoraS-Protocol
• Independer-Protocol
• Server-Protocol

The current state of development can be viewed on the project board.

Included

• Website
• Documentation
• Sourcecode Independer ESP32 (C/C++)
• Sourcecode Independer Server (Python Flask Application)
• Docker Image Independer Server for Linux & Raspberry Pi
• 3D-printed Case
• Releases

More pictures

Devices

3D Printing

UI

Other

Also check out Awesome/Automatic SDR.