Flutter BLE Messaging Demo

Reliable peer-to-peer messaging between Android devices over Bluetooth Low Energy (BLE).

No internet. No backend. Just working device-to-device communication.

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Why this exists

BLE communication between smartphones is unreliable and painful to implement.

Common issues:

• GATT errors (133, timeouts)
• unstable connections
• device-specific behavior (especially Huawei)
• broken message delivery

This project demonstrates a working solution that handles these problems.

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What this demo shows

• two phones connect over BLE
• messages are sent and received in real time
• works across different Android vendors
• includes Huawei workaround (pull mode)

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Features

• BLE peer-to-peer communication
• Chunked message transfer
• 4-byte length + JSON framing protocol
• Automatic message reassembly
• GATT operation queue (fixes GATT_BUSY / 133)
• Auto-reconnect logic
• Huawei compatibility mode (pull instead of push)

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Demo APK

Download the demo application:

➡️ https://github.com/pslergy/flutter-ble-messaging-demo/releases

Install on two devices and test BLE messaging locally.

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Screenshots

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Used in

This transport is used in:

Memento Mori Mesh Messenger
https://github.com/pslergy/memento-mori-app

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Use Cases

• offline messaging
• IoT communication
• mesh networking experiments
• peer-to-peer data exchange

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Who is this for

• mobile developers working with BLE
• startups building offline or mesh apps
• IoT developers needing direct device communication
• engineers tired of fighting BLE instability

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Full Source Code (Paid)

Production-ready implementation used in real-world scenarios.

Includes:

• complete Flutter BLE transport layer
• robust connection manager (auto-reconnect, backoff)
• native Android GATT server + advertising
• stable message protocol with chunking
• Huawei-specific reliability fixes
• ready-to-use demo app

Integration time

~10–15 minutes

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Proof

• tested on Samsung and Huawei devices
• handles real BLE edge cases (GATT 133, timeouts)
• stable message delivery across devices

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Purchase

Price: $399

For cooperation issues - pslergy@gmail.com

👉 Buy now (Usdt TRC 20): TBXUd9XyFYfZE9m3BdJ76659As5dm8DdKD

After payment, I kindly ask you to save time - write your nickname in Github, I will add you to the private repository.

Alternatively:

📩 Email: pslergy@gmail.com

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License

This repository contains demo binaries and documentation only.

The full source code is distributed under a commercial license.