This endeavor is a novel open-source project aimed at establishing a cost-effective communication network for long-distance, off-grid locations. Through the integration of hardware and software elements, we aim to develop a resilient network that surpasses the constraints of traditional communication methods.
At the core of our efforts is the innovative application of LoRa technology. LoRa, short for Long Range, is a distinctive communication protocol that facilitates communication between devices over much greater distances compared to standard methods like Wi-Fi or Bluetooth. This technology proves particularly valuable in areas with limited network infrastructure, providing a dependable option for long-range communication.
The hardware aspect of our project involves a customized adaptation of the "Meshtastic" design, tailored to improve performance and reliability for stable and efficient communication in diverse off-grid scenarios. The flexibility of the Meshtastic design enables us to customize it to suit the specific requirements of our project, enhancing both hardware efficiency and network performance.
+-------------+ Bluetooth +-----------+ LoRa Signal +-----------+ Bluetooth +-------------+
| Smart Phone | <===========> | Mesh node | <===============> | Mesh node | <===========> | Smart Phone |
+-------------+ + ----------+ +-----------+ +-------------+
-
Long-Range Communication: Our project leverages LoRa technology to enable device communication over several kilometers. The range varies based on environmental conditions and hardware specifications, significantly improving traditional Wi-Fi or Bluetooth connections.
-
Low Power Consumption: Efficiency is at the forefront of our design, making it ideal for battery-operated devices. This feature is especially beneficial for remote applications and outdoor scenarios where power resources are scarce.
-
Mesh Networking: The network utilizes a mesh topology, allowing each node within the network to relay messages to other nodes. This structure significantly enhances the resilience and range of the network, making communication more reliable over larger areas.
-
Open-Source Philosophy: We are committed to an open-source approach for this project's software and hardware components. This philosophy fosters a collaborative community environment where users can contribute, modify, and improve the system.
-
GPS Integration: Our devices have GPS functionality, facilitating location sharing and tracking capabilities. This addition is invaluable for navigation and tracking in various scenarios, from recreational activities to critical emergency responses.
-
Versatility in Application: Designed to serve many applications, our system is ideal for hiking, camping, emergency communication, and any other situation where conventional connectivity is unavailable or unreliable.
-
Customizability and Extensibility: Emphasizing the customizable nature of our project, we encourage developers and hobbyists to adapt and extend the system. This openness leads to continuous innovation, allowing for a wide range of personalized applications and enhancements.
Components used in this project:
| Component | Description | Quantity |
|---|---|---|
| Adafruit nRF52840 Feather | micro controller | 1 |
| U-blox NEO-6M GPS | GPS module | 1 |
| Semtech SX1262 LoRa Transceiver | LORA radio chip | 1 |
| SSD1306 oled display | visual display | 1 |
| Custom PCB board | PCB board | 1 |
| 90 degree SMA Connector | Antenna connector | 1 |
| 923Mhz antena | Antenna | 1 |
| Female header | Female header | some |
The top image is Citizen_Mesh_V1_long, and the bottom one is Citizen_Mesh_V1_short.
- Prepare materials
- Solder the component on PCB
- Update bootloader
- Compile Meshtastic
- Upload firmware
There're three ways to update your bootloader:
- USE UF2
- Use Arduino IDE
- Use Command Line
see reference link for detailed steps.
Important
Currently support firmware up to: Meshtastic ver 2.1.11
- Compile
- Flash