Everything I used to turn a 10-year-old Echo Dot into a voice line to my AI chief of staff: - 2nd-gen Echo Dot, already rooted - An always-on Linux box with adb over Wi-Fi - A Python bridge running as a systemd user service - xAI realtime voice (grok-voice-3.0) - Charlie, my agent, reached through a webhook Cost: about $0.08 a minute, with each session capped at 15 minutes. First snag: no sound at all. The playback level was too low, not broken hardware. Full write-up: