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Bluetooth LE Protocol

Low-bandwidth, cable-free protocol - perfect when Wi-Fi isn't available.

Overview

Bluetooth Low Energy (BLE) provides: - ✅ No Wi-Fi needed - ✅ Low power consumption - ✅ Cable-free operation - ✅ Direct device-to-device

Requirements

Python

pip install bleak

Permissions

  • Bluetooth enabled on both devices
  • Bluetooth permissions granted

Quick Start

Python Receiver

import asyncio
from arvos.examples.ble_receiver import main

asyncio.run(main())

iOS App

  1. Open ARVOS app
  2. Select Bluetooth LE protocol
  3. App automatically starts advertising
  4. Python script discovers and connects

Features

No Wi-Fi Required

  • Direct Bluetooth connection
  • Works anywhere
  • No network setup

Low Power

  • BLE is power-efficient
  • Longer battery life
  • Suitable for mobile use

Automatic Discovery

  • Python script scans for device
  • Connects automatically
  • No manual pairing needed

Limitations

Low Bandwidth

  • Telemetry only (IMU, GPS, Pose)
  • No camera/depth (too large for BLE)
  • Maximum ~20 KB/s throughput

Range

  • Limited to ~10 meters
  • Line of sight helps
  • Walls reduce range

Use Cases

  • Field deployments without Wi-Fi
  • Low power requirements
  • Telemetry-only applications
  • Cable-free setups

Data Format

BLE uses length-prefixed messages: 

[Length (2 bytes)][JSON Data]

Messages are automatically chunked and reassembled.

Example

See BLE Example

Next Steps