Even Realities G2 Smart Glasses - Protocol Documentation

I have been reverse engineering the Even Realities G2 smart glasses BLE protocol. If you are interersted in joining this effort, please do!

What the hell does that even mean???

The G2 glasses use a custom protocol created by EvenRealities. This BLE (bluetooth) protocol is used to transmit data in packets to and from the glasses. Currently, the G2 glasses are restricted to the functionality offered in the Even app - reverse engineering the BLE protocol removes this restriction.

Status

Feature	Status	Notes
BLE Connection	Working	Standard BLE, no special pairing
Authentication	Working	7-packet handshake sequence
Teleprompter	Working	Custom text display confirmed
Calendar Widget	Working	Display events on glasses
Notifications	Partial	Metadata only (app + count)
Even AI	Research	Protocol identified
Navigation	Research	High display traffic observed

Quick Start

bashCopy
cd examples/teleprompter
pip install -r requirements.txt

# Display custom text on glasses
python teleprompter.py "Hello from Python!"

# Multi-line text
python teleprompter.py "Line one
Line two
Line three"

Documentation

• BLE Services & UUIDs - Complete characteristic mapping
• Packet Structure - Transport layer format
• Service Reference - All known service IDs
• Teleprompter Protocol - Text display implementation (Work in Progress)

Protocol Files

• proto/ - Protobuf definitions for payload encoding

Key Findings

CRC Algorithm

• Type: CRC-16/CCITT
• Init: 0xFFFF
• Polynomial: 0x1021
• Scope: Calculated over payload bytes only (skip 8-byte header)
• Format: Little-endian

Packet Structure

[AA] [21] [seq] [len] [01] [01] [svc_hi] [svc_lo] [payload...] [crc_lo] [crc_hi]

Architecture

The G2 uses a dual-channel design:

• Content Channel (0x5401): What to display (text, data)
• Rendering Channel (0x6402): How to display (positioning, styling)

Contributing

Pull requests welcome! Areas needing research:

• Navigation turn-by-turn protocol
• Even AI request/response format
• Translation feature
• Display rendering commands (0x6402)

Credits

• Protocol research by the Even Realities community

Disclaimer

This is an unofficial community project for educational purposes. Not affiliated with Even Realities.

Discord

For all communications, I recommend Discord. Join the EvenRealities Discord Server, which contains a reverse engineering channel containing many threads, including G2 RE.