🚀 Add Conversate real-time rendering example (partial → final ASR behavior, firmware v2.0.7.12)

[yasuy0shi]

Overview

This PR introduces a new example:

examples/conversate/

It demonstrates real-time incremental text rendering on Even G2 using the proprietary Conversate service (0x0B20).

Unlike teleprompter, this path is optimized for ASR-style streaming updates:

• Partial → Final rendering
• Rolling line buffer behavior
• Low-latency incremental redraw

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🔬 Observed Behavior (Firmware v2.0.7.12)

Tested on:

• Even G2 (R unit)
• Firmware: v2.0.7.12 (Feb 2026)

Confirmed behavior:

Service: 0x0B20
Text field: fixed 30-byte UTF-8
CRC: CRC16-CCITT-FALSE
flag=0x00 → partial update
flag=0x01 → finalize line
Rolling buffer size: 2 lines
update_id must increment

Behavior may vary across firmware versions.

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🧪 Reproduction

cd examples/conversate
pip install -r requirements.txt

# Single sentence
python conversate.py "Hello from Conversate!"

# ASR-style demo
python conversate.py --demo

# Line buffer test
python conversate.py --line-test 3 --delay 0.8

Expected result (v2.0.7.12):

Only the last two finalized lines remain visible.

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🧠 Spec Proposal

This PR intentionally separates:

• Observed Behavior (empirical, firmware-specific)
• Spec Proposal (community baseline for discussion)

This keeps the contribution conservative and safe for merge while enabling future protocol formalization.

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📦 Why This Is Useful

This enables:

• Real-time ASR streaming integration
• Subtitle-style rendering
• Incremental transcription systems
• Cross-firmware reverse-engineering validation

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⚠️ Notes

• No existing examples were modified
• teleprompter remains untouched
• Implementation avoids device-specific hardcoded magic values

Contributions and verification from other firmware versions are welcome.

[leovigna]

Hey @yasuy0shi wanna chat? I created a Discord server to build an open sdk for G2. https://discord.gg/Ts9kkCCY

[maciejklimek]

Hey @leovigna, the Discord invite link seems to have expired — would love to join! I have G2 glasses and I'm building an agent system (voice + BLE) where G2 would be the display layer. Very interested in contributing to an open SDK, especially around the Conversate service for real-time text streaming. Could you share a fresh invite link?