CallPilot v0.1.0 — Developer Preview

Your calls, handled by AI. First public release of CallPilot — an open-source AI phone agent on a Quectel EC20/EG25 4G modem: auto-answers calls with a realtime voice AI, dials out, sends/receives SMS, presses IVR menus (DTMF), and records + summarizes every call. All on your own hardware and API keys.

Developer Preview. Verified end-to-end on real hardware (EC20 EC20CEFAGR08A03M4G, macOS): both audio directions confirmed against China Telecom's 10000 IVR — the AI held a multi-turn conversation with the voice menu and pressed keys autonomously — plus SMS balance-query round-trip. This release targets developers; we want your hardware reproduction reports.

Highlights

• 📞 Auto-answer + outbound dialing (single with per-call topic, batch with whitelist) via hardware AT events — not screen automation
• 🧠 Cloud realtime speech-to-speech (Alibaba Qwen Omni default, Doubao scaffolding) with function calling: send SMS, hang up, read OTP, press DTMF
• 💬 SMS send/receive with Chinese UCS2
• 🖥️ Desktop app — phosphor-green dark UI, live transcript, call history, recordings + AI summaries, bilingual EN/中文
• 🛡️ Reliability: starts without a modem attached (background supervisor reconnects), USB drop-off storm root-caused (system sleep → endpoint stall) and mitigated (caffeinate -s, dev.reset(), backoff + cold-restart)

Known limitations

• macOS only in practice; uac_ffmpeg is the only verified audio mode (nmea crashes EC20 USB — don't use it)
• Windows/Linux serial paths exist but are unverified — reports welcome
• Half-duplex (no barge-in); no self-contained installer yet (the .app is a thin shell over your checkout)
• Bring your own DashScope API key + SIM with voice/SMS service

Get started

See the README quick start. Full details in CHANGELOG.md.

Have an EC20/EG25? Please file a hardware report — firmware version, OS, what worked and what didn't.