OFF-GRID • CENSORSHIP RESISTANT • PERSISTENT

Decentralized
LoRa Mesh
Communication

Real-world resilient group messaging that works when the internet doesn't. Self-healing radio mesh with persistent Room Servers. No central servers. No KYC.

Flash Device & Get Started Open Device Manager
Works without internet
End-to-end encrypted
PLSC powered • Heltec V4
Communities & Events
Remote & Off-Grid Teams
Preppers & Sovereignty
Protests & Censored Areas
THE PROJECT

What is PLSChat?

PLSChat is a lightweight, secure LoRa mesh platform built for real-world off-grid use. It turns compatible ESP32 LoRa devices (Heltec V4 recommended) into a self-healing radio network where messages hop between nodes without any internet, cellular towers, or central infrastructure.

Its standout feature is Room Servers — persistent group chat rooms that store the last ~32 messages. Participants can retrieve missed messages even after being offline for hours or days. It's decentralized, radio-powered group chat with store-and-forward resilience.

WHAT IT DOES WELL

Core Capabilities

Self-Healing Mesh Network

Devices automatically relay messages and reroute around offline nodes. The network stays alive even if individual devices drop out. True peer-to-peer radio communication.

Persistent Room Servers

Create or join named group rooms. Messages are stored and forwarded. Catch up on the last ~32 messages when you reconnect — even after long offline periods.

End-to-End Encryption

Messages are encrypted using Diffie-Hellman key exchange. Content stays private between participants. No central party can read your chats.

True Off-Grid Operation

No internet, no cellular, no ISPs, no data centers required. Works in remote wilderness, during blackouts, or under active censorship.

Heltec V4 & ESP32 LoRa Support

Optimized for Heltec V4 (recommended). Also works with LilyGo, T-Deck, RAK and most ESP32 LoRa boards. Flash directly from your browser.

PLSC Token Utility

Device-bound licenses unlock premium features. Aligns with PulseChain ecosystem. Open core protocol with optional paid enhancements.

HONEST & TRANSPARENT

Realistic Limitations & Trade-offs

We built PLSChat for resilience in adversarial or infrastructure-poor environments — not as a universal replacement for internet apps. Here's what you should know upfront.

Geographic & Range Limits

  • • Coverage depends on terrain, antennas, node density and placement. Expect reliable local-to-regional reach in a well-deployed mesh.
  • • Not designed for instant global messaging like internet platforms. Messages propagate physically through the mesh.
  • • Sparse networks or difficult terrain can reduce reliability and increase latency.

Bandwidth & Message Limits

  • • LoRa prioritizes long range and low power. Best suited for short-to-medium text messages and group coordination.
  • • Not ideal for high-volume chat, large files, images, voice notes, or streaming. Data rates are inherently limited.
  • • Not ideal for high-volume chat, large files, images, voice notes, or streaming. Data rates are inherently limited.
  • • Room Servers currently store only the most recent ~32 messages. Retrieve important history promptly.

Hardware Requirement

  • • Requires dedicated compatible LoRa hardware (Heltec V4 recommended). Cannot run as pure software on standard phones or laptops.
  • • Users must acquire, power, and position physical devices. Battery life varies by hardware and duty cycle.
  • • Initial firmware flashing and PLSC license activation require an internet connection (one-time or occasional).

Physical & Operational Security

  • • Physical device seizure remains a risk. Strong user practices (key management, device security) are essential.
  • • Local radio interception is possible with specialized equipment and physical proximity to the mesh area.
  • • Regulatory compliance for radio transmission power and duty cycles is the user's responsibility.
These limitations are intentional design choices that deliver genuine resilience where internet-based systems fail.
ARCHITECTURAL ADVANTAGE

Built for Real Adversarial Conditions

PLSChat has no central servers, relays, or cloud infrastructure that authorities can locate, subpoena, or remotely disable. Messages travel as radio signals between physical devices you control.

Key resilience properties:

  • • Self-healing mesh — network survives node failures
  • • Distributed Room Servers across participating devices
  • • No single point of failure or legal attack surface
  • • Global mass surveillance extremely difficult and expensive
  • • Jamming or disruption requires physical presence and resources

This architecture was specifically designed for scenarios where traditional internet infrastructure is unavailable, monitored, or actively suppressed.

THREAT MODEL FIT
Remote server seizure / legal demands VERY LOW RISK
Internet takedown / mass censorship IMMUNE
Mass metadata surveillance VERY DIFFICULT
Content interception (E2EE) PROTECTED
START BUILDING YOUR MESH

Get Started in Minutes

Flash firmware directly from your browser on your Heltec V4, activate with PLSC, and start communicating off-grid.

STEP 01 — HARDWARE
Get a Heltec V4 (Recommended)
Heltec V4 running PLSChat showing OLED with licence, mode, PLSC, and uptime

Real Heltec V4 running PLSChat

The Heltec V4 is currently the best supported and recommended board. It has a built-in OLED that beautifully displays PLSChat status, mesh info, and more.

Also compatible with LilyGo, T-Deck, RAK and other ESP32 LoRa boards.
STEP 02 — FLASH
Flash Firmware

Use the browser-based Web Flasher. Works directly in Chrome or Edge. Hold the BOOT button on your Heltec V4 when prompted.

Open Web Flasher
STEP 03 — ACTIVATE
Activate & Connect

Buy PLSC tokens, activate your device license via Device Manager, then create or join Room Servers and start messaging off-grid.

Open Device Manager

PLSC token purchase and full documentation coming soon. Core protocol is open. Heltec V4 is the primary supported device right now.